Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
Skip to main content

Exotic Hadrons: Review and Perspectives

  • Published:
Few-Body Systems Aims and scope Submit manuscript

Abstract

The physics of exotic hadrons is revisited and reviewed, with emphasis on flavour configurations which have not yet been investigated. The constituent quark model of multiquark states is discussed in some detail, as it can serve as a guide for more elaborate approaches.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Subscribe and save

Springer+ Basic
$34.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or eBook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Segrè, E.: From X-rays to quarks: modern physicists and their discoveries (Freeman, San Francisco, CA, 1980) trans. of: Personaggi e scoperte nella fisica contemporanea. Milano: Mondadori (1976)

  2. Pais, A.: Inward Bound: of Matter and Forces in the Physical World. Clarendon Press, Oxford (1986)

    Google Scholar 

  3. Ezhela, V.V., Filimonov, B.B., Lugovsky, S.B., Polishchuk, B.V., Striganov, S.I., Stroganov, Y.G., Armstrong, B., Barnett, R.M., Groom, D.E., Gee, P.S., Trippe, T.G., Wohl, C.G., Jackson, J.D.: Particle Physics, One Hundred Years of Discoveries: An Annotated Chronological Bibliography. AIP, New York (1996)

    MATH  Google Scholar 

  4. Breit, G.: Aspects of nucleon-nucleon scattering theory. Rev. Mod. Phys. 34, 766–812 (1962)

    Article  ADS  MATH  Google Scholar 

  5. Chew, G.F., Low, F.E.: Effective range approach to the low-energy p wave pion-nucleon interaction. Phys. Rev. 101, 1570–1579 (1956)

    Article  ADS  MathSciNet  MATH  Google Scholar 

  6. Chew, G.F.: The Analytic S-Matrix: a Basis for Nuclear Democracy. Benjamin, New York (1966)

    Google Scholar 

  7. Ball, J.S., Scotti, A., Wong, D.Y.: One-boson-exchange model of \(NN\) and \(N\bar{N}\) interaction. Phys. Rev. 142, 1000–1012 (1966)

    Article  ADS  Google Scholar 

  8. Olive, K.A., et al.: (Particle Data Group), Review of particle physics. Chin. Phys. C 38, 090001 (2014)

    Article  ADS  Google Scholar 

  9. Montanet, L., Rossi, G.C., Veneziano, G.: Baryonium physics. Phys. Rep. 63, 149–222 (1980)

    ADS  Google Scholar 

  10. Amsler, C., Tornqvist, N.A.: Mesons beyond the naive quark model. Phys. Rep. 389, 61–117 (2004)

    Article  ADS  Google Scholar 

  11. Klempt, E., Zaitsev, A.: Glueballs, hybrids, multiquarks. Experimental facts versus QCD inspired concepts. Phys. Rep. 454, 1–202 (2007). arXiv:0708.4016 [hep-ph]

    Article  ADS  Google Scholar 

  12. Dalpiaz, P., Klapisch, R., Lefevre, P., Macri, M., Montanet, L., Mohl, D., Martin, A., Richard, J.-M., Pirner, H.J.L.: Tecchio, Physics at SuperLEAR. In: Les Houches. Workshop 1987(0414), 0414 (1987)

  13. Amsler, C., et al.: Perspectives in hadron and quark dynamics, prospects of hadron and quark physics with electromagnetic probes. In: Proceedings, 2nd ELFE Workshop on Hadronic Physics, Saint Malo, France, Sept 23–27, 1996. Nucl. Phys. A622, 315C–354C (1997)

  14. von Harrach, D.: (COMPASS), The COMPASS experiment at CERN, Quark lepton nuclear physics. In: Proceedings, International Conference, QULEN’97, Osaka, Japan, May 20–23, 1997. Nucl. Phys. A629, 245C–254C (1998)

  15. Destefanis, M.: (PANDA) The PANDA experiment at FAIR. In: Proceedings, 7th Joint International Hadron Structure’13 Conference (HS 13. Nucl. Phys. Proc. Suppl. 245, 199–206 (2013)

  16. Swanson, E.S.: The new heavy mesons: a status report. Phys. Rep. 429, 243–405 (2006). arXiv:hep-ph/0601110

    Article  ADS  Google Scholar 

  17. Nielsen, M., Navarra, F.S., Lee, S.H.: New charmonium states in QCD sum rules: a concise review. Phys. Rep. 497, 41–83 (2010). arXiv:0911.1958 [hep-ph]

    Article  ADS  Google Scholar 

  18. Hambrock, C.: Exotic heavy quark spectroscopy: theory interpretation vs. data. In: Proceedings, 14th International Conference on B-Physics at Hadron Machines (Beauty 2013), PoS Beauty 2013, 044 (2013), arXiv:1306.0695 [hep-ph]

  19. Chen, H.-X., Chen, W., Liu, X., Zhu, S.-L.: The hidden-charm pentaquark and tetraquark states (2016). doi:10.1016/j.physrep.2016.05.004, arXiv:1601.02092 [hep-ph]

  20. Narison, S.: QCD as a theory of Hadrons: from partons to confinement. In: Nuclear Physics and Cosmology. Cambridge University Press, Cambridge Monographs on Particle Physics (2004)

  21. Pennington, M.R. (ed.): Proceedings, 16th International Conference on Hadron Spectroscopy (Hadron 2015), vol. 1735 (2016)

  22. Bicudo, P., Dubnicka, S., Giacosa, F., Kaminski, R., Marinkovic, M.K. (eds.) Proceedings, International Meeting of Excited QCD 2015, vol. 8 (2015)

  23. https://baryons2016.physics.fsu.edu/indico/event/0/contributions

  24. Achard, P., et al.: (L3), Measurement of exclusive \(\rho ^+ \rho ^-\) production in mid-virtuality two-photon interactions and study of the \(\gamma \gamma ^*\rightarrow \rho \rho \) process at LEP. Phys. Lett. B 615, 19–30 (2005). arXiv:hep-ex/0504016 [hep-ex]

    Article  ADS  Google Scholar 

  25. Achard, P., et al.: (L3), Measurement of exclusive \(\rho ^0 \rho ^0\) production in two photon collisions at high \(Q^{2}\) at LEP. Phys. Lett. B 568, 11–22 (2003). arXiv:hep-ex/0305082 [hep-ex]

    Article  ADS  Google Scholar 

  26. Anikin, I.V., Pire, B., Teryaev, O.V.: Search for isotensor exotic meson and twist-4 contribution to \(\gamma ^* \gamma \rightarrow \rho \rho \). Phys. Lett. B 626, 86–94 (2005). arXiv:hep-ph/0506277 [hep-ph]

    Article  ADS  Google Scholar 

  27. Dorofeev, V. et al.: (VES), The \(J^{PC} = 1^{-+}\) hunting season at VES. In: Proceedings, 9th International Conference on Hadron Spectroscopy (Hadron 2001), AIP Conference Proceedings 619, 143–154 (2002), [143(2001)], arXiv:hep-ex/0110075 [hep-ex]

  28. Thompson, D.R., et al.: (E852), Evidence for exotic meson production in the reaction pi-p–> eta pi-p at 18-GeV/c. Phys. Rev. Lett. 79, 1630–1633 (1997). arXiv:hep-ex/9705011 [hep-ex]

    Article  ADS  Google Scholar 

  29. Alekseev, M., et al.: (COMPASS), Observation of a \(J^{PC} = 1^{-+}\) exotic resonance in diffractive dissociation of 190 GeV/\(c\) \(\pi ^-\) into \(\pi ^-\pi ^- \pi ^+\). Phys. Rev. Lett. 104, 241803 (2010). arXiv:0910.5842 [hep-ex]

    Article  ADS  Google Scholar 

  30. Al Ghoul H., et al.: (GlueX), First results from the GlueX experiment. In: 16th International Conference on Hadron Spectroscopy (Hadron 2015) Newport News, Virginia, USA, Sept 13–18, 2015 (2015) arXiv:1512.03699 [nucl-ex]

  31. Meyer, C.A., Swanson, E.S.: Hybrid mesons. Prog. Part. Nucl. Phys. 82, 21–58 (2015). arXiv:1502.07276 [hep-ph]

    Article  ADS  Google Scholar 

  32. Amsler, C., Hanhart, C.: Non-\(q\bar{q}\) mesons, in [6]

  33. Aubert, B., et al.: (BaBar), Observation of a narrow meson decaying to \(D_s^+ \pi ^0\) at a mass of \(2.32\,\)GeV\(/c^2\). Phys. Rev. Lett. 90, 242001 (2003). arXiv:hep-ex/0304021 [hep-ex]

    Article  ADS  Google Scholar 

  34. Besson, D., et al.: (CLEO), Observation of a narrow resonance of mass \(2.46\,\)GeV\(/c^2\) decaying to \(D*+_s \pi ^0\) and confirmation of the \(D^*_{sJ}(2317)\) state. Phys. Rev. D 68, 032002 (2003). [Erratum: Phys. Rev. D75, 119908 (2007)]

    Article  ADS  Google Scholar 

  35. Godfrey, S., Isgur, N.: Mesons in a relativized quark model with chromodynamics. Phys. Rev. D 32, 189–231 (1985)

    Article  ADS  Google Scholar 

  36. Pignon, D., Piketty, C.A.: Charmed meson spectra. Phys. Lett. B 81, 334–338 (1979)

    Article  ADS  Google Scholar 

  37. Schnitzer, H.J.: Spin dependence and glueball mixing with \(\theta (1640)\) in ordinary meson spectroscopy. Nucl. Phys. B 207, 131–156 (1982)

    Article  ADS  Google Scholar 

  38. Cahn, R.N., Jackson, J.D.: Spin-orbit and tensor forces in heavy-quark light-quark mesons: implications of the new \(D_s\) state at 2.32 GeV. Phys. Rev. D 68, 037502 (2003). arXiv:hep-ph/0305012

  39. Matsuki, T., Morii, T., Sudoh, K.: New heavy-light mesons \(Q\bar{q}\). Prog. Theor. Phys. 117, 1077–1098 (2007). arXiv:hep-ph/0605019 [hep-ph]

    Article  ADS  Google Scholar 

  40. Nielsen, M., D’Elia, R.M., Navarra, F.S., Bracco, M.E.: Testing the nature of the \(D_{sJ}^+(2317)\) and \(X(3782)\) states using QCD sum rules. In: Proceedings, 18th International IUPAP Conference on Few-Body Problems in Physics (FB18). Nucl. Phys. A790, 526–529 (2007)

  41. Vijande, J., Fernandez, F., Valcarce, A.: The puzzle of the \(D\) and \(D_s\) mesons, quarks and nuclear physics. In: Proceedings, 4th International Conference, QNP 2006, Madrid, Spain, June 5–10, 2006, Eur. Phys. J. A31, 722–724 (2007a)

  42. Segovia, J., Entem, D.R., Fernandez, F.: Charmed-strange Meson spectrum: old and new problems. Phys. Rev. D 91, 094020 (2015). arXiv:1502.03827 [hep-ph]

    Article  ADS  Google Scholar 

  43. Godfrey, S., Moats, K.: Properties of excited charm and charm-strange Mesons. Phys. Rev. D 93, 034035 (2016). arXiv:1510.08305 [hep-ph]

    Article  ADS  Google Scholar 

  44. Dover, C.B., Kahana, S.H.: Possibility of charmed hypernuclei. Phys. Rev. Lett. 39, 1506–1509 (1977)

    Article  ADS  Google Scholar 

  45. Dover, C.B., Kahana, S.H., Trueman, T.L.: Bound states of Charmed Baryons and anti-Baryons. Phys. Rev. D 16, 799–815 (1977)

    Article  ADS  Google Scholar 

  46. Isgur, N., Lipkin, H.J.: On the possible existence of stable four quark scalar mesons with charm and strangeness. Phys. Lett. B 99, 151 (1981)

    Article  ADS  Google Scholar 

  47. Cho, S., et al.: (ExHIC), Multi-quark hadrons from Heavy Ion Collisions. Phys. Rev. Lett. 106, 212001 (2011). arXiv:1011.0852 [nucl-th]

    Article  ADS  Google Scholar 

  48. Yu-qi, C., Su-zhi, W.: Production of four-quark states with double heavy quarks at LHC. Phys. Lett. B 705, 93–97 (2011). arXiv:1101.4568 [hep-ph]

    Article  ADS  Google Scholar 

  49. Hyodo, T., Liu, Y.-R., Oka, M., Sudoh, K., Yasui, S.: Production of doubly charmed tetraquarks with exotic color configurations in electron-positron collisions (2012). arXiv:1209.6207 [hep-ph]

  50. Esposito, A., Papinutto, M., Pilloni, A., Polosa, A.D., Tantalo, N.: Doubly charmed tetraquarks in \(B_c\) and \(\Xi _{bc}\) decays. Phys. Rev. D 88, 054029 (2013). arXiv:1307.2873 [hep-ph]

    Article  ADS  Google Scholar 

  51. Abe, K., et al.: (Belle), study of double charmonium production in e\(+\) e\(-\) annihilation at \(\sqrt{s}\sim 10.6\) GeV. Phys. Rev. D 70, 071102 (2004). arXiv:hep-ex/0407009 [hep-ex]

    Article  ADS  Google Scholar 

  52. Martin, A., Richard, J.M.: The eventful story of charmonium singlet states. CERN Cour. 43, 17–18 (2003)

    Google Scholar 

  53. Barnes, T., Olsen, S.L.: Charmonium spectroscopy. Int. J. Mod. Phys. A 24(S1), 305–325 (2009)

    Article  ADS  Google Scholar 

  54. Baglin, C., et al.: (R704, Annecy(LAPP)-CERN-Genoa-Lyon-Oslo-Rome-Strasbourg-Turin), search for the \(p\) wave singlet charmonium state in \(\bar{p} p\) annihilations at the CERN intersecting storage rings. Phys. Lett. B 171, 135–141 (1986)

    Article  ADS  Google Scholar 

  55. Armstrong, T.A., et al.: Observation of the p wave singlet state of charmonium. Phys. Rev. Lett. 69, 2337–2340 (1992)

    Article  ADS  Google Scholar 

  56. Rubin, P., et al.: (CLEO), Observation of the \({}^{1}P_1\) state of charmonium. Phys. Rev. D 72, 092004 (2005). arXiv:hep-ex/0508037 [hep-ex]

    Article  ADS  Google Scholar 

  57. Choi, S.K., et al.: (Belle), Observation of the \(\eta _c(2s)\) in exclusive \(B\rightarrow K K_s K^- \pi ^+\) decays. Phys. Rev. Lett. 89, 102001 (2002), [Erratum: Phys. Rev. Lett. 89, 129901 (2002)], arXiv:hep-ex/0206002 [hep-ex]

  58. Choi, S.K., et al.: (Belle), Observation of a new narrow charmonium state in exclusive \(B^\pm \rightarrow K^\pm \pi ^+ \pi ^- J/\psi \) decays. Phys. Rev. Lett. 91, 262001 (2003). arXiv:hep-ex/0309032

    Article  ADS  Google Scholar 

  59. Lebed, R.F.: Exotic discoveries in familiar places: theory of the onia and exotics. In: 16th International Conference on B-Physics at Frontier Machines (Beauty 2016), 2–6 May 2016. Marseille, France, to appear in PoS, arXiv:1605.07975 [hep-ph]

  60. Aubert, B., et al.: (BABAR), Observation of a broad structure in the \(\pi ^+\pi ^- J/\psi \) mass spectrum around \(4.26\,\)GeV\(/c^2\). Phys. Rev. Lett. 95, 142001 (2005a). arXiv:hep-ex/0506081

    Article  ADS  Google Scholar 

  61. Choi, S.K., et al.: (BELLE Collaboration), Observation of a resonance-like structure in the \(\pi ^\pm \psi ^{\prime }\) mass distribution in exclusive \(B\rightarrow K \pi ^\pm \psi ^{\prime }\) decays. Phys. Rev. Lett. 100, 142001 (2008). arXiv:0708.1790 [hep-ex]

    Article  ADS  Google Scholar 

  62. Abe, K., et al.: (Belle), Observation of a new charmonium state in double charmonium production in \(e^+ e^-\) annihilation at \(\sqrt{s}\sim 10.6\) GeV. Phys. Rev. Lett. 98, 082001 (2007). arXiv:hep-ex/0507019 [hep-ex]

    Article  ADS  Google Scholar 

  63. Pakhlov, P., et al.: (Belle), Production of new charmoniumlike states in \(e^+ e^-\rightarrow J/\psi D^{(*)} \bar{D}^{(*)}\) at \(\sqrt{s} \sim 10\) GeV. Phys. Rev. Lett. 100, 202001 (2008). arXiv:0708.3812 [hep-ex]

    Article  ADS  Google Scholar 

  64. Uehara, S., et al.: (Belle), Observation of a \(\chi _2^{\prime }\) candidate in \(\gamma \gamma \rightarrow D \bar{D}\) production at BELLE. Phys. Rev. Lett. 96, 082003 (2006). arXiv:hep-ex/0512035 [hep-ex]

    Article  ADS  Google Scholar 

  65. Uehara, S., et al.: (Belle), Observation of a charmonium-like enhancement in the \(\gamma \gamma \rightarrow \omega J/\psi \) process. Phys. Rev. Lett. 104, 092001 (2010). arXiv:0912.4451 [hep-ex]

    Article  ADS  Google Scholar 

  66. Shen, C.P., et al.: (Belle), Evidence for a new resonance and search for the \(Y(4140)\) in the \(\gamma \gamma \rightarrow \phi J/\psi \) process. Phys. Rev. Lett. 104, 112004 (2010). arXiv:0912.2383 [hep-ex]

    Article  ADS  Google Scholar 

  67. Pakhlova, G., et al.: (Belle), Observation of a near-threshold enhancement in the \(e^+e^- \rightarrow \Lambda ^+_c\bar{\Lambda }^-_c\) cross section using initial-state radiation. Phys. Rev. Lett. 101, 172001 (2008). arXiv:0807.4458 [hep-ex]

    Article  ADS  Google Scholar 

  68. Sonnenschein, J., Weissman, D: A tetraquark or not a tetraquark: a holography inspired stringy hadron (HISH) perspective (2016). arXiv:1606.02732 [hep-ph]

  69. Guo, F.-K., Haidenbauer, J., Hanhart, C., Meissner, U.-G.: Reconciling the X(4630) with the Y(4660). Phys. Rev. D 82, 094008 (2010). arXiv:1005.2055 [hep-ph]

    Article  ADS  Google Scholar 

  70. Aubert, B., et al.: (BaBar), Search for a charged partner of the X(3872) in the \(B\) meson decay \(B \rightarrow X^- K\), \(X^- \rightarrow J/\psi \pi ^- \pi ^0\). Phys. Rev. D 71, 031501 (2005b). arXiv:hep-ex/0412051 [hep-ex]

    Article  ADS  Google Scholar 

  71. Ablikim, M., et al.: (BESIII Collaboration), Observation of a charged charmoniumlike structure in \(e^+e^- \rightarrow \pi ^+\pi ^-J/\psi \) at \(\sqrt{s}=4.26\) GeV. Phys. Rev. Lett. 110, 252001 (2013). arXiv:1303.5949 [hep-ex]

    Article  ADS  Google Scholar 

  72. Liu, Z.Q., et al.: (Belle Collaboration), Study of \(e^+ e^- \rightarrow \pi ^+ \pi ^- J/\psi \) and observation of a charged charmonium-like state at Belle. Phys. Rev. Lett. 110, 252002 (2013). arXiv:1304.0121 [hep-ex]

    Article  ADS  Google Scholar 

  73. Xiao, T., Dobbs, S., Tomaradze, A., Seth, K.K.: Observation of the charged Hadron \(Z_c^{\pm }(3900)\) and evidence for the neutral \(Z_c^0(3900)\) in \(e^+e^-\rightarrow \pi \pi J/\psi \) at \(\sqrt{s}=4170\) MeV. Phys. Lett. B 727, 366–370 (2013a). arXiv:1304.3036 [hep-ex]

    Article  ADS  Google Scholar 

  74. Nerling, F.: (COMPASS), Highlights from the COMPASS experiment at CERN—Hadron spectroscopy and excitations. In: 4th International Conference on New Frontiers in Physics (ICNFP 2015) Kolymbari, Greece, Aug 23–30, 2015 (2016), arXiv:1601.05025 [hep-ex]

  75. Roel, A. et al.: (LHCb), Observation of \(J/\psi \phi \) structures consistent with exotic states from amplitude analysis of \(B^+\rightarrow J/\psi \phi K^+\) decays (2016a) arXiv:1606.07895 [hep-ex]

  76. Stancu, F.: Can \(Y(4140)\) be a \(c \bar{c} s \bar{s}\) tetraquark? J. Phys. G37, 075017 (2010). arXiv:0906.2485 [hep-ph]

    Article  ADS  Google Scholar 

  77. Høgåsen, H., Richard, J.-M., Sorba, P.: A chromomagnetic mechanism for the X(3872) resonance. Phys. Rev. D 73, 054013 (2006). arXiv:hep-ph/0511039

    Article  ADS  Google Scholar 

  78. Crede, V., Roberts, W.: Progress towards understanding baryon resonances. Rep. Prog. Phys. 76, 076301 (2013). arXiv:1302.7299 [nucl-ex]

    Article  ADS  Google Scholar 

  79. Isgur, N.: An introduction to the quark model for baryons. Int. J. Mod. Phys. E 1, 465–490 (1992)

    Article  ADS  Google Scholar 

  80. Dalitz, R.H., Tuan, S.F.: The phenomenological description of \(K\)-nucleon reaction processes. Ann. Phys. 10, 307–351 (1960)

    Article  ADS  MathSciNet  MATH  Google Scholar 

  81. Oset, E.: in [21]

  82. Isgur, N., Karl, G.: P-wave Baryons in the quark model. Phys. Rev. D 18, 4187 (1978)

    Article  ADS  Google Scholar 

  83. Kamiya, Y., Miyahara, K., Ohnishi, S., Ikeda, Y., Hyodo, T., Oset, E., Weise, W.: Antikaon-nucleon interaction and \(\Lambda \)(1405) in chiral SU(3) dynamics. Nucl. Phys. A 954, 41–57 (2016). arXiv:1602.08852 [hep-ph]

    Article  ADS  Google Scholar 

  84. Close, F.E.: Light hadron spectroscopy: theory and experiment, Lepton and photon interactions at high energies. In: Proceedings, 20th International Symposium, LP 2001, Rome, Italy, July 23–28, 2001, Int. J. Mod. Phys. A17, 3239–3258 (2002), [327(2001)], arXiv:hep-ph/0110081 [hep-ph]

  85. Carter, A.A.: Evidence for an \(S=+1\), \(I=0\) resonance in the \({K}^{+}\)-nucleon system. Phys. Rev. Lett. 18, 801–803 (1967)

    Article  ADS  Google Scholar 

  86. Lea, A.T., Martin, B.R., Oades, G.C.: \({K}^{+}p\) phase-shift analysis below \(1500\,\text{ MeV }/c\). Phys. Rev. 165, 1770–1786 (1968)

    Article  ADS  Google Scholar 

  87. Wilson, B.C., et al.: Phase-shift analysis of the \(K^+\)-nucleon interaction in the \(I=0\) state up to 1.5 GeV\(/c\). Nucl. Phys. B42, 445–453 (1972)

    Article  ADS  Google Scholar 

  88. Albrow, M.G., Andersson-Almehed, S., Bosnjakovic, B., Daum, C., Erne, F.C., Kimura, Y., Lagnaux, J.P., Sens, J.C., Udo, F., Wagner, F.: Elastic scattering of positive kaons on polarized protons between 0.87 and 2.74 Gev\(/c\). Results and phase-shift analysis. Nucl. Phys. B30, 273–305 (1971)

    Article  ADS  Google Scholar 

  89. Martin, B.R.: Kaon-nucleon partial wave amplitudes below \(1.5\,\)GeV\(/c\) for \(I=0\) and 1. Nucl. Phys. B94, 413–430 (1975)

    Article  ADS  Google Scholar 

  90. Kelly, R.L., et al.: (Particle Data Group), Review of particle properties. Particle data group. Rev. Mod. Phys. 52, S1–S286 (1980)

    Article  ADS  Google Scholar 

  91. Nakano, T., et al.: (LEPS), Evidence for narrow \(S=+1\) Baryon resonance in photo-production from neutron. Phys. Rev. Lett. 91, 012002 (2003). arXiv:hep-ex/0301020

    Article  ADS  Google Scholar 

  92. Diakonov, D., Petrov, V., Polyakov, M.V.: Exotic anti-decuplet of baryons: prediction from chiral solitons. Z. Phys. A 359, 305–314 (1997). arXiv:hep-ph/9703373

    Article  ADS  Google Scholar 

  93. Wohl, C.G., Pentaquarks (2008)

  94. Hicks, K.H.: On the conundrum of the pentaquark. Eur. Phys. J. H37, 1–31 (2012)

    MathSciNet  Google Scholar 

  95. Tariq, A.S.B.: Revisiting the pentaquark episode for lattice QCD. In: Proceedings, 25th International Symposium on Lattice field theory (Lattice 2007), PoS LAT2007, 136 (2007), arXiv:0711.0566 [hep-lat]

  96. Jaffe, R.L.: The width of the theta\(+\) exotic baryon in the chiral soliton model. Eur. Phys. J. C 35, 221–222 (2004). arXiv:hep-ph/0401187 [hep-ph]

    Article  ADS  Google Scholar 

  97. Weigel, H.: Axial current matrix elements and pentaquark decay widths in chiral soliton models. Phys. Rev. D 75, 114018 (2007). arXiv:hep-ph/0703072 [hep-ph]

    Article  ADS  MathSciNet  Google Scholar 

  98. Abazov, V.M., et al.: (D0), Observation of the doubly strange \(b\) baryon \(\Omega _b^-\). Phys. Rev. Lett. 101, 232002 (2008). arXiv:0808.4142 [hep-ex]

    Article  ADS  Google Scholar 

  99. Aaltonen, T., et al.: (CDF), Observation of the \(\Omega _b^-\) and measurement of the properties of the \(\Xi _b^-\) and \(\Omega _b^-\). Phys. Rev. D 80, 072003 (2009). arXiv:0905.3123 [hep-ex]

    Article  ADS  Google Scholar 

  100. Aaij, R., et al.: (LHCb), Measurement of the \(\Lambda _b^0\), \(\Xi _b^-\) and \(\Omega _b^-\) baryon masses. Phys. Rev. Lett. 110, 182001 (2013a). arXiv:1302.1072 [hep-ex]

    Article  ADS  Google Scholar 

  101. Amsler, C., et al.: (Particle Data Group), Review of particle physics. Phys. Lett. B 667, 1–1340 (2008a)

    Article  ADS  Google Scholar 

  102. Dong, Y., Faessler, A., Gutsche, T., Kumano, S., Lyubovitskij, V.E.: Strong three-body decays of \(\Lambda _c(2940)^+\). Phys. Rev. D 83, 094005 (2011). arXiv:1103.4762 [hep-ph]

    Article  ADS  Google Scholar 

  103. Aaij, R., et al.: (LHCb), Observation of two new \(\Xi _b^-\) baryon resonances. Phys. Rev. Lett. 114, 062004 (2015a). arXiv:1411.4849 [hep-ex]

    Article  ADS  Google Scholar 

  104. Aaij, R. et al. (LHCb), Measurement of the properties of the \(\Xi _b^{*0}\) baryon, (2016b). arXiv:1604.03896 [hep-ex]

  105. Ebert, D., Faustov, R.N., Galkin, V.O., Martynenko, A.P.: Mass spectra of doubly heavy baryons in the relativistic quark model. Phys. Rev. D 66, 014008 (2002). arXiv:hep-ph/0201217 [hep-ph]

    Article  ADS  Google Scholar 

  106. Fleck, S., Richard, J.M.: Baryons with double charm. Prog. Theor. Phys. 82, 760–774 (1989)

    Article  ADS  Google Scholar 

  107. Mattson, M., et al.: (SELEX), First observation of the doubly charmed baryon \(\Xi _{cc}^+\). Phys. Rev. Lett. 89, 112001 (2002). arXiv:hep-ex/0208014

    Article  ADS  Google Scholar 

  108. Ocherashvili, A., et al.: (SELEX), Confirmation of the double charm baryon \(\Xi _{cc}^+(3520)\) via its decay to \(pD^+ K^-\). Phys. Lett. B 628, 18–24 (2005). arXiv:hep-ex/0406033

    Article  ADS  Google Scholar 

  109. Ratti, S.P.: New results on c-baryons and a search for cc-baryons in FOCUS, Proceedings, 5th International Conference on Hyperons, charm and beauty hadrons (BEACH 2002), Nucl. Phys. Proc. Suppl. 115, 33–36 (2003), [33(2003)]

  110. Aubert, B., et al.: (BaBar), Search for doubly charmed baryons \(\Xi _{cc}^+\) and \(\Xi _{cc}^{++}\) in BaBar. Phys. Rev. D 74, 011103 (2006a). arXiv:hep-ex/0605075 [hep-ex]

    Article  ADS  Google Scholar 

  111. Kato, Y., et al.: (Belle), Search for doubly charmed baryons and study of charmed strange baryons at Belle. Phys. Rev. D 89, 052003 (2014). arXiv:1312.1026 [hep-ex]

    Article  ADS  Google Scholar 

  112. Aaij, R., et al.: (LHCb), Search for the doubly charmed baryon \(\Xi _{cc}^+\). JHEP 12, 090 (2013b). arXiv:1310.2538 [hep-ex]

    ADS  Google Scholar 

  113. Brodsky, S., de Teramond, G., Karliner, M.: Puzzles in hadronic physics and novel quantum chromodynamics phenomenology. Ann. Rev. Nucl. Part. Sci. 62, 1–35 (2012), [Ann. Rev. Nucl. Part. Sci. 62, 2082(2011)], arXiv:1302.5684 [hep-ph]

  114. Karliner, M., Rosner, J.L.: Baryons with two heavy quarks: masses, production, decays, and detection. Phys. Rev. D 90, 094007 (2014). arXiv:1408.5877 [hep-ph]

    Article  ADS  Google Scholar 

  115. Gelman, B.A.: Nussinov, S.: Does a narrow tetraquark \((cc\bar{u} \bar{d})\) state exist? Phys. Lett. B 551, 296–304 (2003). arXiv:hep-ph/0209095 [hep-ph]

    Article  ADS  Google Scholar 

  116. Cohen, T.D.: Doubly heavy hadrons and the domain of validity of doubly heavy diquark-anti-quark symmetry. Phys. Rev. D 74, 094003 (2006). arXiv:hep-ph/0606084 [hep-ph]

    Article  ADS  Google Scholar 

  117. Gignoux, C., Silvestre-Brac, B., Richard, J.M.: Possibility of stable multi-quark baryons. Phys. Lett. B 193, 323 (1987)

    Article  ADS  Google Scholar 

  118. Lipkin, H.J.: New new possibilities for exotic hadrons: anticharmed strange Baryons. Phys. Lett. B 195, 484 (1987)

  119. Aitala, E.M., et al.: (E791), Search for the pentaquark via the \(P^0(\bar{c} s)\) decay. Phys. Rev. Lett. 81, 44–48 (1998). arXiv:hep-ex/9709013 [hep-ex]

    Article  ADS  Google Scholar 

  120. Aitala, E.M., et al.: (E791), Search for the pentaquark via the \(P^0(\bar{c} s) \rightarrow K^{0,*} K^- p\) decay. Phys. Lett. B 448, 303–310 (1999)

    Article  ADS  Google Scholar 

  121. Aktas, A., et al.: (H1), Evidence for a narrow anti-charmed baryon state. Phys. Lett. B 588, 17 (2004). arXiv:hep-ex/0403017 [hep-ex]

    Article  ADS  Google Scholar 

  122. Chekanov, S., et al.: (ZEUS), Search for a narrow charmed baryonic state decaying to \(D^{*\pm } p^\mp \) in \(ep\) collisions at HERA. Eur. Phys. J. C 38, 29–41 (2004). arXiv:hep-ex/0409033 [hep-ex]

    Article  Google Scholar 

  123. Aubert, B., et al.: (BaBar), Search for the charmed pentaquark candidate \(\Theta _c(3100)\) in \(e^+e^-\) annihilations at \(\sqrt{s} = 10.58\,\)GeV. Phys. Rev. D 73, 091101 (2006b). arXiv:hep-ex/0604006 [hep-ex]

    Article  ADS  Google Scholar 

  124. Baum, G., Kyynäräinen, J., Tripet, A.: (NA58 Collaboration), COMPASS: a proposal for a common muon and proton apparatus for structure and spectroscopy, Tech. Rep. CERN-SPSLC-96-14. SPSLC-P-297 (CERN, Geneva, 1996)

  125. Aaij, R., et al.: (LHCb), Observation of \(J/\psi p\) resonances consistent with pentaquark states in \(\Lambda _b^0\rightarrow J/\psi K^-p\) decays. Phys. Rev. Lett. 115, 072001 (2015b). arXiv:1507.03414 [hep-ex]

    Article  ADS  Google Scholar 

  126. Aaij, R. et al. (LHCb), Model-independent evidence for \(J/\psi p\) contributions to \(\Lambda _b^0\rightarrow J/\psi p K^-\) decays, (2016c). arXiv:1604.05708 [hep-ex]

  127. Aaij, R., et al.: (LHCb), Observation of the \(\Lambda _b^0 \rightarrow J/\psi p \pi ^-\) decay. JHEP 07, 103 (2014). arXiv:1406.0755 [hep-ex]

    Article  ADS  Google Scholar 

  128. Burns, T.J.: Phenomenology of P\(_{c}\)(4380)\(^{+}\), P\(_{c}\)(4450)\(^{+}\) and related states. Eur. Phys. J. A 51, 152 (2015). arXiv:1509.02460 [hep-ph]

    Article  ADS  Google Scholar 

  129. Wang, E., Chen, H.-X., Geng, L.-S., Li, D.-M., Oset, E.: A hidden-charm pentaquark state in \(\Lambda ^0_b \rightarrow J/\psi p \pi ^-\) decay. Phys. Rev. D 93, 094001 (2016). arXiv:1512.01959 [hep-ph]

    Article  ADS  Google Scholar 

  130. Aaij, R. et al. (LHCb), Evidence for exotic hadron contributions to \(\Lambda _b^0 \rightarrow J/\psi p \pi ^-\) decays, Phys. Rev. Lett. 117, 082003 (2016d), [Addendum: Phys. Rev. Lett. 117(10), 109902 (2016)], arXiv:1606.06999 [hep-ex]

  131. Kubarovsky, V., Voloshin, M.B.: Formation of hidden-charm pentaquarks in photon-nucleon collisions. Phys. Rev. D 92, 031502 (2015). arXiv:1508.00888 [hep-ph]

    Article  ADS  Google Scholar 

  132. Kubarovsky, V., Voloshin, M.B.: Search for hidden-charm pentaquark with CLAS12, (2016). arXiv:1609.00050 [hep-ph]

  133. Blin, H., Fernández-Ramírez, C., Jackura, A., Mathieu, V., Mokeev, V.I., Pilloni, A., Szczepaniak, A.P.: Studying the P\(_c\)(4450) resonance in J/\(\psi \) photoproduction off protons. Phys. Rev. D 94, 034002 (2016). arXiv:1606.08912 [hep-ph]

    Article  ADS  Google Scholar 

  134. Karliner, M., Rosner, J.L.: Photoproduction of exotic Baryon resonances. Phys. Lett. B 752, 329–332 (2016). arXiv:1508.01496 [hep-ph]

    Article  ADS  Google Scholar 

  135. Meziani, Z.E., et al.: A search for the LHCb charmed ’Pentaquark’ using photo-production of \(J/{\psi }\) at threshold in hall C at Jefferson Lab, (2016). arXiv:1609.00676 [hep-ex]

  136. Mattione, P.: in [21]

  137. Arndt, R.A., Hyslop III, J.S., Roper, L.D.: Nucleon-nucleon partial wave analysis to 1100 MeV. Phys. Rev. D 35, 128 (1987)

    Article  ADS  Google Scholar 

  138. Arndt, R.A., Strakovsky, I.I., Workman, R.L., Bugg, D.V.: Analysis of the reaction \(\pi ^+ d\rightarrow p p\) to 500 MeV. Phys. Rev. C 48, 1926–1938 (1993)

    Article  ADS  Google Scholar 

  139. Arndt, R.A., Strakovsky, I.I., Workman, R.L.: Analysis of \(\pi d\) elastic scattering data to 500 MeV. Phys. Rev. C 50, 1796–1806 (1994). arXiv:nucl-th/9407032 [nucl-th]

    Article  ADS  Google Scholar 

  140. Tatischeff, B., et al.: Evidence for narrow dibaryons at 2050 MeV, 2122 MeV, and 2150 MeV observed in inelastic \(p p\) scattering. Phys. Rev. C 59, 1878–1889 (1999)

    Article  ADS  Google Scholar 

  141. Parker, B., Seth, K.K., Ginsburg, C.M., O’Reilly, B., Sarmiento, M.: Search for a \(T=2\) Dibaryon. Phys. Rev. Lett. 63, 1570 (1989)

    Article  ADS  Google Scholar 

  142. De Boer, F.W.N., et al.: Search for bound states of neutrons and negative pions. Phys. Rev. Lett. 53, 423–426 (1984)

    Article  ADS  Google Scholar 

  143. Adlarson, P., et al.: (WASA-at-COSY) Evidence for a new resonance from polarized neutron-proton scattering. Phys. Rev. Lett. 112, 202301 (2014a). arXiv:1402.6844 [nucl-ex]

    Article  ADS  Google Scholar 

  144. Adlarson, P., et al.: (WASA-at-COSY), Neutron-proton scattering in the context of the d* (2380) resonance. Phys. Rev. C 90, 035204 (2014b). arXiv:1408.4928 [nucl-ex]

    Article  ADS  Google Scholar 

  145. Goldman, T., Maltman, K., Stephenson Jr., G.J., Schmidt, K.E., Wang, F.: An ’inevitable’ nonstrange dibaryon. Phys. Rev. C 39, 1889–1895 (1989)

    Article  ADS  Google Scholar 

  146. Ohnishi, S., Ikeda, Y., Kamano, H., Sato, T.: Signature of strange dibaryon in kaon-induced reaction. In: Proceedings, 5th asia-pacific conference on few-body problems in physics 2011 (APFB2011). Few Body Syst. 54, 347–351 (2013), arXiv:1109.4724 [nucl-th]

  147. Hashimoto, T., et al.: (J-PARC E15), Search for the deeply bound \(K^-pp\) state from the semi-inclusive forward-neutron spectrum in the in-flight \(K^-\) reaction on \(^3\)He. PTEP 2015, 061D01 (2014), arXiv:1408.5637 [nucl-ex]

  148. Zel’dovich, Y.B.: Energy levels in a distorted Coulomb field. Sov. Phys. Solid State 1, 1497–1501 (1960)

    MathSciNet  Google Scholar 

  149. Gal, A., Friedman, E., Batty, C.J.: On the interplay between Coulomb and nuclear states in exotic atoms. Nucl. Phys. A 606, 283–291 (1996)

    Article  ADS  Google Scholar 

  150. Combescure, M., Khare, A., Raina, A., Richard, J.-M., Weydert, C.: Level rearrangement in exotic atoms and quantum dots. Int. J. Mod. Phys. B 21, 3765–3781 (2007). arXiv:cond-mat/0701006 [cond-mat]

    Article  ADS  MATH  Google Scholar 

  151. Jaffe, R.L.: Perhaps a stable dihyperon, Phys. Rev. Lett. 38, 195–198 (1977), [Erratum: Phys. Rev. Lett. 38, 617(1977)]

  152. Dalitz, R.H., Davis, D.H., Fowler, P.H., Montwill, A., Pniewski, J., Zakrzewski, J.A.: The Identified \(\Lambda \Lambda \) Hypernuclei and the Predicted \(H\) Particle. Proc. R. Soc. Lond. A426, 1–17 (1989)

    Article  ADS  Google Scholar 

  153. Kuhn, C., Hippolyte, B., Coffin, J.P., Baudot, J., Belikov, I., Dietrich, D., Germain, M., Suire, C.: Search for strange dibaryons in STAR and ALICE, Strange quarks in matter. Proceedings, 6th International Conference, SQM 2001, Frankfurt, Germany, September 24–29, 2001. J. Phys. G28, 1707–1714 (2002)

    Article  ADS  Google Scholar 

  154. Goldman, T., Maltman, K., Stephenson Jr., G.J., Schmidt, K.E., Wang, F.: Strangeness \(-\)3 dibaryons. Phys. Rev. Lett. 59, 627 (1987)

    Article  ADS  Google Scholar 

  155. Huang, H., Jialun, P., Fan, W.: Further study of the \(N\Omega \) dibaryon within constituent quark models. Phys. Rev. C 92, 065202 (2015). arXiv:1507.07124 [hep-ph]

    Article  ADS  Google Scholar 

  156. Thomas, L.H.: The interaction between a neutron and a proton and the structure of \(^3\)H. Phys. Rev. 47, 903–909 (1935)

    Article  ADS  MATH  Google Scholar 

  157. Zhukov, M.V., Danilin, B.V., Fedorov, D.V., Bang, J.M., Thompson, I.J., Vaagen, J.S.: Bound state properties of Borromean Halo nuclei: \({}^6\)He and \({}^{11}\)Li. Phys. Rep. 231, 151–199 (1993)

    Article  ADS  Google Scholar 

  158. Richard, J.-M.: Borromean binding (2003). http://theor.jinr.ru/Few-body/Belyaev-70/, arXiv:nucl-th/0305076 [nucl-th]

  159. Hiyama, E.: Few-body aspects of hypernuclear physics. Few Body Syst. 53, 189–236 (2012)

    Article  ADS  Google Scholar 

  160. Filikhin, I.N., Gal, A.: Light \(\Lambda \Lambda \) hypernuclei and the onset of stability for \(\Lambda \Xi \) hypernuclei. Phys. Rev. C 65, 041001 (2002). arXiv:nucl-th/0110008 [nucl-th]

    Article  ADS  Google Scholar 

  161. Garcilazo, H., Valcarce, A., Carames, T.F.: The \(N\Lambda \Lambda -\Xi NN\) bound state problem with \(N\Lambda \Sigma \) and \(N\Sigma \Sigma \) channels. J. Phys. G42, 025103 (2015)

    Article  ADS  Google Scholar 

  162. Richard, J.-M., Wang, Q., Zhao, Q.: Lightest neutral hypernuclei with strangeness \(-1\) and \(-2\). Phys. Rev. C 91, 014003 (2015). arXiv:1404.3473 [nucl-th]

    Article  ADS  Google Scholar 

  163. Garcilazo, H., Valcarce, A., Vijande, J.: Maximal isospin few-body systems of nucleons and \(\Xi \) hyperons. Phys. Rev. C 94, 024002 (2016). arXiv:1608.05192 [nucl-th]

    Article  ADS  Google Scholar 

  164. Carbonell, J., Lazauskas, R., Delande, D., Hilico, L., Kiliç, S.: A new vibrational level of the H\(_{2}^{+}\) molecular ion. EPL (Europhysics Letters) 64, 316–322 (2003). arXiv:physics/0207007

    Article  ADS  Google Scholar 

  165. Varga, K., Usukura, J., Suzuki, Y.: Second bound state of the positronium molecule and biexcitons. Phys. Rev. Lett. 80, 1876–1879 (1998). arXiv:cond-mat/9802261

    Article  ADS  Google Scholar 

  166. Czarnecki, A.: Positronium and polyelectrons. Nucl. Phys. A 827, 541–543c (2009)

    Article  ADS  Google Scholar 

  167. Richard, J.-M.: Critically bound four-body molecules. Phys. Rev. A 67, 034702 (2003). arXiv:physics/0302004

    Article  ADS  Google Scholar 

  168. Roy, D.P.: History of exotic meson (4-quark) and baryon (5-quark) states. J. Phys. G30, R113 (2004). arXiv:hep-ph/0311207

    Article  ADS  Google Scholar 

  169. Rosner, J.L.: Possibility of baryon-anti-baryon enhancements with unusual quantum numbers. Phys. Rev. Lett. 21, 950–952 (1968)

    Article  ADS  Google Scholar 

  170. Rossi, G., Veneziano, G.: The string-junction picture of multiquark states: an update. JHEP 06, 041 (2016). arXiv:1603.05830 [hep-th]

    Article  ADS  Google Scholar 

  171. Artru, X.: String model with baryons: topology, classical motion. Nucl. Phys. B 85, 442 (1975)

    Article  ADS  Google Scholar 

  172. Muller, V.F.: On composite hadrons in nonabelian lattice gauge theories. Nucl. Phys. B 116, 470 (1976)

    Article  ADS  Google Scholar 

  173. Hasenfratz, P., Horgan, R.R., Kuti, J., Richard, J.M.: Heavy Baryon Spectroscopy in the QCD bag model. Phys. Lett. B 94, 401–404 (1980a)

    Article  ADS  Google Scholar 

  174. Carlson, J., Kogut, J.B., Pandharipande, V.R.: A quark model for baryons based on quantum chromodynamics. Phys. Rev. D 27, 233 (1983)

    Article  ADS  Google Scholar 

  175. Bagan, E., Latorre, J.I., Merkurev, S.P., Tarrach, R.: The baryon loop tension from continuum QCD. Phys. Lett. B 158, 145 (1985)

    Article  ADS  Google Scholar 

  176. de la Ripelle, M.F., Lassaut, M.: Transformation of a three-body interaction into a sum of pairwise potentials: application to the quark-string-junction and the Urbana potentials. Few Body Syst. 23, 75–86 (1997)

    Article  MathSciNet  Google Scholar 

  177. Evangelista, C., et al.: Evidence for a narrow width Boson of Mass 2.95 GeV. Phys. Lett. B72, 139 (1977)

    Article  ADS  Google Scholar 

  178. Jaffe, R.L.: \(Q^2\bar{Q}{}^2\) resonances in the Baryon-antibaryon system. Phys. Rev. D 17, 1444 (1978)

    Article  ADS  MathSciNet  Google Scholar 

  179. Chan, H.-M., Fukugita, M., Hansson, T.H., Hoffman, H.J., Konishi, K., Høgåsen, H.: Tsun Tsou, S.: Color chemistry: a study of metastable multi-quark molecules. Phys. Lett. B76, 634–640 (1978)

    Article  ADS  Google Scholar 

  180. Fermi, E., Yang, C.-N.: Are mesons elementary particles? Phys. Rev. 76, 1739–1743 (1949)

    Article  ADS  MATH  Google Scholar 

  181. Shapiro, I.S.: The physics of nucleon-anti-nucleon systems. Phys. Rep. 35, 129–185 (1978)

    Article  ADS  Google Scholar 

  182. Buck, W.W., Dover, C.B., Richard, J.-M.: The interaction of nucleons with anti-nucleons. 1. General features of the \(\bar{N} N\) spectrum in potential models. Ann. Phys. 121, 47 (1979)

    Article  ADS  Google Scholar 

  183. Voloshin, M.B., Okun, L.B.: Hadron molecules and charmonium atom. JETP Lett. 23, 333–336 (1976)

    ADS  Google Scholar 

  184. De Rujula, A., Georgi, H., Glashow, S.L.: Molecular charmonium: a new spectroscopy? Phys. Rev. Lett. 38, 317 (1977)

    Article  ADS  Google Scholar 

  185. Le Yaouanc, A., Oliver, L., Pene, O., Raynal, J.C.: Strong decays of \(\psi (4.028)\) as a radial excitation of charmonium. Phys. Lett. B71, 397 (1977a)

    Article  ADS  Google Scholar 

  186. Le Yaouanc, A., Oliver, L., Pene, O., Raynal, J.C.: Why is \(\psi ^{\prime \prime \prime }(4.414)\) so narrow? Phys. Lett. B72, 57 (1977b)

    Article  ADS  Google Scholar 

  187. Eichten, E., Gottfried, K., Kinoshita, T., Lane, K.D., Yan, T.-M.: Charmonium: comparison with experiment. Phys. Rev. D 21, 203 (1980)

    Article  ADS  Google Scholar 

  188. Törnqvist, N.A.: Possible large deuteron-like meson meson states bound by pions. Phys. Rev. Lett. 67, 556–559 (1991)

    Article  ADS  Google Scholar 

  189. Manohar, A.V., Wise, M.B.: Exotic \(Q Q \bar{q} \bar{q}\) states in QCD. Nucl. Phys. B 399, 17–33 (1993). arXiv:hep-ph/9212236

    Article  ADS  Google Scholar 

  190. Ericson, T.E.O.: Strength of pion exchange in hadronic molecules. Phys. Lett. B 309, 426–430 (1993)

    Article  ADS  Google Scholar 

  191. Törnqvist, N.A.: From the deuteron to deusons, an analysis of deuteron - like meson meson bound states. Z. Phys. C 61, 525–537 (1994). arXiv:hep-ph/9310247 [hep-ph]

    Article  ADS  Google Scholar 

  192. Ferretti, J., Galatà, G., Santopinto, E.: Interpretation of the X(3872) as a charmonium state plus an extra component due to the coupling to the meson-meson continuum. Phys. Rev. C 88, 015207 (2013). arXiv:1302.6857 [hep-ph]

    Article  ADS  Google Scholar 

  193. Thomas, C.E., Close, F.E.: Is X(3872) a molecule? Phys. Rev. D 78, 034007 (2008). arXiv:0805.3653 [hep-ph]

    Article  ADS  Google Scholar 

  194. Ohkoda, S., Yamaguchi, Y., Yasui, S., Sudoh, K., Hosaka, A.: Exotic mesons with hidden bottom near thresholds. Phys. Rev. D 86, 014004 (2012a). arXiv:1111.2921 [hep-ph]

    Article  ADS  Google Scholar 

  195. Cleven, M., Guo, F.-K., Hanhart, C., Wang, Q., Zhao, Q.: Employing spin symmetry to disentangle different models for the \(XYZ\) states. Phys. Rev. D 92, 014005 (2015). arXiv:1505.01771 [hep-ph]

    Article  ADS  Google Scholar 

  196. Hofmann, J., Lutz, M.F.M.: Coupled-channel study of baryon resonances with charm. In: Proceedings, 11th International Conference on Hadron spectroscopy (Hadron 2005) (2005) arXiv:nucl-th/0510091 [nucl-th]

  197. Hofmann, J., Lutz, M.F.M.: Coupled-channel study of crypto-exotic baryons with charm. Nucl. Phys. A 763, 90–139 (2005b). arXiv:hep-ph/0507071 [hep-ph]

    Article  ADS  Google Scholar 

  198. Xiao, C.W., Nieves, J., Oset, E.: Combining heavy quark spin and local hidden gauge symmetries in the dynamical generation of hidden charm baryons. Phys. Rev. D 88, 056012 (2013b). arXiv:1304.5368 [hep-ph]

    Article  ADS  Google Scholar 

  199. Yang, Z.-C., Sun, Z.-F., He, J., Liu, X., Zhu, S.-L.: The possible hidden-charm molecular baryons composed of anti-charmed meson and charmed baryon. Chin. Phys. C 36, 6–13 (2012). arXiv:1105.2901 [hep-ph]

    Article  ADS  Google Scholar 

  200. Landsberg, L.G.: Do the narrow cryptoexotic baryon resonances exist? Phys. Atom. Nucl. 57, 2127–2131 (1994), [Yad. Fiz.57N12,2210(1994)]

  201. Wong, C.-Y.: Molecular states of heavy quark mesons. Phys. Rev. C 69, 055202 (2004). arXiv:hep-ph/0311088 [hep-ph]

    Article  ADS  Google Scholar 

  202. Ohkoda, S., Yamaguchi, Y., Yasui, S., Sudoh, K., Hosaka, A.: Exotic mesons with double charm and bottom flavor. Phys. Rev. D 86, 034019 (2012b). arXiv:1202.0760 [hep-ph]

    Article  ADS  Google Scholar 

  203. Karliner, M., Rosner, J.L.: New exotic Meson and Baryon resonances from doubly-heavy hadronic molecules. Phys. Rev. Lett. 115, 122001 (2015). arXiv:1506.06386 [hep-ph]

    Article  ADS  Google Scholar 

  204. Yasui, S., Sudoh, K.: Exotic nuclei with open heavy flavor mesons. Phys. Rev. D 80, 034008 (2009). arXiv:0906.1452 [hep-ph]

    Article  ADS  Google Scholar 

  205. Froemel, F., Julia-Diaz, B., Riska, D.O.: Bound states of double flavor hyperons. Nucl. Phys. A 750, 337–356 (2005). arXiv:nucl-th/0410034 [nucl-th]

    Article  ADS  Google Scholar 

  206. Liu, Y.-R., Oka, M.: \(\Lambda _c N\) bound states revisited. Phys. Rev. D 85, 014015 (2012). arXiv:1103.4624 [hep-ph]

    Article  ADS  Google Scholar 

  207. Meguro, W., Liu, Y.-R., Oka, M.: Possible \(\Lambda _c\Lambda _c\) molecular bound state. Phys. Lett. B 704, 547–550 (2011). arXiv:1105.3693 [hep-ph]

    Article  ADS  Google Scholar 

  208. Huang, H., Ping, J., Wang, F.: Possible \(H\)-like dibaryon states with heavy quarks. Phys. Rev. C 89, 035201 (2014). arXiv:1311.4732 [hep-ph]

    Article  ADS  Google Scholar 

  209. Lee, N., Luo, Z.-G., Chen, X.-L., Zhu, S.-L.: Possible deuteron-like molecular states composed of heavy baryons. Phys. Rev. D 84, 014031 (2011). arXiv:1104.4257 [hep-ph]

    Article  ADS  Google Scholar 

  210. Li, N., Zhu, S.-L.: Hadronic molecular states composed of heavy flavor baryons. Phys. Rev. D 86, 014020 (2012). arXiv:1204.3364 [hep-ph]

    Article  ADS  Google Scholar 

  211. Julia-Diaz, B., Riska, D.O.: Nuclei of double charm hyperons, the structure of Baryons. In: Proceedings, 10th international conference, Baryons’04, Palaiseau, France, Oct 25–29, 2004. Nucl. Phys. A755, 431–434 (2005). arXiv:nucl-th/0405061 [nucl-th]

  212. Van Hove, L.: Future prospects of particle physics. In: 7th European symposium on nucleon antinucleon interactions: antiproton 86, Thessaloniki, Greece, Sept 1–5, 1986 (1986)

  213. Ochs, W.: The status of glueballs. J. Phys. G40, 043001 (2013). arXiv:1301.5183 [hep-ph]

    Article  ADS  Google Scholar 

  214. Tang, L., Qiao, C.-F.: Mass spectra of \(0^{+-}\), \(1^{-+}\), and \(2^{+-}\) exotic glueballs. Nucl. Phys. B 904, 282–296 (2016). arXiv:1509.00305 [hep-ph]

    Article  ADS  MathSciNet  MATH  Google Scholar 

  215. Buisseret, F., Semay, C., Mathieu, V., Silvestre-Brac, B.: Excited string and constituent gluon descriptions of hybrid mesons. In: Proceedings, 20th European Conference on Few-Body Problems in Physics (EFB20), Few Body Syst. 44, 87–89 (2008)

  216. Giles, R., Tye, S.H.H.: The application of the quark-confining string to the psi spectroscopy. Phys. Rev. D 16, 1079 (1977)

    Article  ADS  Google Scholar 

  217. Horn, D., Mandula, J.: A model of mesons with constituent gluons. Phys. Rev. D 17, 898 (1978)

    Article  ADS  Google Scholar 

  218. Hasenfratz, P., Horgan, R.R., Kuti, J., Richard, J.M.: The effects of colored glue in the QCD motivated bag of heavy quark-anti-quark systems. Phys. Lett. B 95, 299 (1980b)

    Article  ADS  Google Scholar 

  219. Mandula, J.E.: Quark-anti-quark-gluon exotic fields for lattice QCD. Phys. Lett. B 135, 155–158 (1984)

    Article  ADS  Google Scholar 

  220. Juge, K.J., Kuti, J., Morningstar, C.: The heavy-quark hybrid meson spectrum in lattice qcd. AIP Conf. Proc. 688, 193–207 (2004). arXiv:nucl-th/0307116

    Article  ADS  Google Scholar 

  221. Berwein, M., Vairo, A., Brambilla, N., Castella, J.T.: Quarkonium hybrids with non-relativistic filed theory, Phys. Rev. D 62, 114019 (2015). arXiv:15110.04299 [hep-ph]

  222. Shifman, M.A., Vainshtein, A.I., Zakharov, V.I.: Theoretical foundations. Nucl. Phys. B147, 385–447 (1979a)

    Article  ADS  Google Scholar 

  223. Shifman, M.A., Vainshtein, A.I., Zakharov, V.I.: QCD and resonance physics. Applications. Nucl. Phys. B147, 448–518 (1979b)

    Article  ADS  Google Scholar 

  224. Shifman, M.A., Vainshtein, A.I., Zakharov, V.I.: QCD and resonance physics. The rho-omega mixing. Nucl. Phys. B147, 519–534 (1979c)

    Article  ADS  Google Scholar 

  225. Matheus, R.D., Narison, S., Nielsen, M., Richard, J.M.: Can the \(X(3872)\) be a \(1^{++}\) four-quark state? Phys. Rev. D 75, 014005 (2007). arXiv:hep-ph/0608297

    Article  ADS  Google Scholar 

  226. Chen, H.-X., Liu, X., Hosaka, A., Zhu, S.-L.: The Y(2175) state in the QCD sum rule. Phys. Rev. D 78, 034012 (2008). arXiv:0801.4603 [hep-ph]

    Article  ADS  Google Scholar 

  227. Narison, S., Navarra, F.S., Nielsen, M.: Investigating different structures for the \(X(3872)\). In: Proceedings, 15th High-Energy Physics International Conference on Quantum Chromodynamics (QCD 10), Nucl. Phys. Proc. Suppl. 207208, 249–252 (2010), arXiv:1007.4575 [hep-ph]

  228. DeTar, C.: LQCD: Flavor Physics and Spectroscopy, (2015), Lepton-Photon 2015, Ljubljana, Slovenia, to appear in PoS, arXiv:1511.06884 [hep-lat]

  229. Fiebig, H.R., Rabitsch, K., Markum, H., Mihaly, A.: Exploring the \(\pi ^+\pi ^+\) interaction in lattice qcd. Few Body Syst. 29, 95–120 (2000). arXiv:hep-lat/9906002

    Article  ADS  Google Scholar 

  230. Inoue, T., et al.: (HAL QCD), Bound H-dibaryon in Flavor SU(3) Limit of Lattice QCD. Phys. Rev. Lett. 106, 162002 (2011). arXiv:1012.5928 [hep-lat]

    Article  ADS  Google Scholar 

  231. Beane, S.R., et al.: (NPLQCD), Evidence for a bound H-dibaryon from Lattice QCD. Phys. Rev. Lett. 106, 162001 (2011). arXiv:1012.3812 [hep-lat]

    Article  ADS  Google Scholar 

  232. Suganuma, H., Iritani, T., Okiharu, F., Takahashi, T.T., Yamamoto, A.: Lattice QCD study for confinement in Hadrons. AIP Conf. Proc. 1388, 195–201 (2011). arXiv:1103.4015 [hep-lat]

    Article  ADS  Google Scholar 

  233. Aoki, S., Doi, T., Hatsuda, T., Ikeda, Y., Inoue, T., Ishii, N., Murano, K., Nemura, H., Sasaki, K.: (HAL QCD), Lattice QCD approach to nuclear physics. PTEP 2012, 01A105 (2012). arXiv:1206.5088 [hep-lat]

    Google Scholar 

  234. Kirscher, J., Barnea, N., Gazit, D., Pederiva, F., van Kolck, U.: Spectra and scattering of light latticenuclei from effective field theory. Phys. Rev. C 92, 054002 (2015). arXiv:1506.09048 [nucl-th]

    Article  ADS  Google Scholar 

  235. Dudek, J.J.: Hadron scattering and resonances in QCD. In: Proceedings, 16th International Conference on Hadron Spectroscopy (Hadron 2015), AIP Conference Proceedings 1735, 020014 (2016)

  236. Francis, A., Hudspith, R.J., Lewis, R., Maltman, K.: Doubly bottom strong-interaction stable tetraquarks from lattice QCD (2016). arXiv:1607.05214 [hep-lat]

  237. Green, A.M., Pennanen, P.: An interquark potential model for multiquark systems. Phys. Rev. C 57, 3384–3391 (1998). arXiv:hep-lat/9804003 [hep-lat]

    Article  ADS  Google Scholar 

  238. Michael, C., Pennanen, P.: (UKQCD), Two heavy-light mesons on a lattice. Phys. Rev. D 60, 054012 (1999). arXiv:hep-lat/9901007 [hep-lat]

    Article  ADS  Google Scholar 

  239. Bali, G., Hetzenegger, M.: Static-light meson-meson potentials. PoS LATTICE 2010, 142 (2010). arXiv:1011.0571 [hep-lat]

    Google Scholar 

  240. Bicudo, P., Cichy, K., Peters, A., Wagner, M.: BB interactions with static bottom quarks from lattice QCD. Phys. Rev. D 93, 034501 (2016). arXiv:1510.03441 [hep-lat]

    Article  ADS  Google Scholar 

  241. De Rújula, A., Georgi, H., Glashow, S.L.: Hadron masses in a gauge theory. Phys. Rev. D 12, 147–162 (1975)

    Article  ADS  Google Scholar 

  242. Takahashi, H., et al.: Observation of a \({}_{\Lambda \Lambda }^{6}{\rm He}\) double hypernucleus. Phys. Rev. Lett. 87, 212502 (2001)

    Article  ADS  Google Scholar 

  243. Oka, M., Shimizu, K., Yazaki, K.: The dihyperon state in the quark cluster model. Phys. Lett. B 130, 365 (1983)

    Article  ADS  Google Scholar 

  244. Rosner, J.L.: SU(3) breaking and the \(H\) dibaryon. Phys. Rev. D 33, 2043 (1986)

    Article  ADS  Google Scholar 

  245. Karl, G., Zenczykowski, P.: \(H\) dibaryon spectrocopy. Phys. Rev. D 36, 2079 (1987)

    Article  ADS  Google Scholar 

  246. Faessler, A., Straub, U.: Baryon baryon interaction in the quark model and the \(H\) dibaryon. In: Erice 1989, Proceedings, the Nature of Hadrons and Nuclei by Electron Scattering, 323–332. Prog. Part. Nucl. Phys. 24, 323–332 (1990)

  247. Leandri, J., Silvestre-Brac, B.: Systematics of \(\bar{Q} Q^4\) systems with a pure chromomagnetic interaction. Phys. Rev. D 40, 2340–2352 (1989)

    Article  ADS  Google Scholar 

  248. Silvestre-Brac, B., Leandri, J.: Systematics of \(q^6\) systems in a simple chromomagnetic model. Phys. Rev. D 45, 4221–4239 (1992)

    Article  ADS  Google Scholar 

  249. Leandri, J., Silvestre-Brac, B.: Dibaryon states containing two different types of heavy quarks. Phys. Rev. D 51, 3628–3637 (1995)

    Article  ADS  Google Scholar 

  250. Lichtenberg, D.B., Roncaglia, R.: Colormagnetic interaction, diquarks, and exotic hadrons. In: International Workshop on Diquarks, Turin, Italy, Nov 2–4, 1992 (1992)

  251. Buccella, F., Høgåsen, H., Richard, J.-M., Sorba, P.: Chromomagnetism, flavour symmetry breaking and S-wave tetraquarks. Eur. Phys. J. C 49, 743–754 (2007). arXiv:hep-ph/0608001

    Article  ADS  Google Scholar 

  252. Ader, J.P., Richard, J.M., Taxil, P.: Do narrow heavy multiquark states exist? Phys. Rev. D 25, 2370 (1982)

    Article  ADS  Google Scholar 

  253. Heller, L., Tjon, J.A.: On the existence of stable dimesons. Phys. Rev. D 35, 969 (1987)

    Article  ADS  Google Scholar 

  254. Zouzou, S., Silvestre-Brac, B., Gignoux, C., Richard, J.M.: Four quark bound states. Z. Phys. C 30, 457 (1986)

    Article  ADS  Google Scholar 

  255. Carlson, J., Heller, L., Tjon, J.A.: Stability of dimesons. Phys. Rev. D 37, 744 (1988)

    Article  ADS  Google Scholar 

  256. Bressanini, D., Mella, M., Morosi, G.: Stability of four-body systems in three and two dimensions: A theoretical and quantum monte carlo study of biexciton molecules. Phys. Rev. A 57, 4956–4959 (1998)

    Article  ADS  Google Scholar 

  257. Varga, K., Usukura, J., Suzuki, Y.: Recent applications of the stochastic variational method. In: Desplanques, B., Protasov, K., Silvestre-Brac, B., Carbonell, J. (eds.) Few-Body Problems in Physics ’98 (1999) p. 11

  258. Lloyd, R.J., Vary, J.P.: All charm tetraquarks. Phys. Rev. D 70, 014009 (2004). arXiv:hep-ph/0311179 [hep-ph]

    Article  ADS  Google Scholar 

  259. Cafer, A.Y., Richard, J.-M., Rubinstein, J.H.: Stability of asymmetric tetraquarks in the minimal-path linear potential. Phys. Lett. B 674, 227–231 (2009). arXiv:0901.3022 [math-ph]

    Article  ADS  Google Scholar 

  260. Lenz, F., Londergan, J.T., Moniz, E.J., Rosenfelder, R., Stingl, M., Yazaki, K.: Quark confinement and hadronic interactions. Ann. Phys. 170, 65 (1986)

    Article  ADS  Google Scholar 

  261. Vijande, J., Valcarce, A., Richard, J.M.: Stability of multiquarks in a simple string model. Phys. Rev. D 76, 114013 (2007b). arXiv:0707.3996 [hep-ph]

    Article  ADS  Google Scholar 

  262. Richard, J.-M.: Stability of the pentaquark in a naive string model. Phys. Rev. C 81, 015205 (2010). arXiv:0908.2944 [hep-ph]

    Article  ADS  Google Scholar 

  263. Vijande, J., Valcarce, A., Richard, J.-M.: Stability of hexaquarks in the string limit of confinement. Phys. Rev. D 85, 014019 (2012). arXiv:1111.5921 [hep-ph]

    Article  ADS  Google Scholar 

  264. Vijande, J., Valcarce, A., Richard, J.-M.: Adiabaticity and color mixing in tetraquark spectroscopy. Phys. Rev. D 87, 034040 (2013). arXiv:1301.6212 [hep-ph]

    Article  ADS  Google Scholar 

  265. Silvestre-Brac, B., Semay, C., Narodetskii, I.M., Veselov, A.I.: The Baryonic \(Y\)-shape confining potential energy and its approximants. Eur. Phys. J. C 32, 385–397 (2003). arXiv:hep-ph/0309247 [hep-ph]

    Article  ADS  Google Scholar 

  266. Bicudo, P., Cardoso, M.: Iterative method to compute the Fermat points and Fermat distances of multiquarks. Phys. Lett. B 674, 98–102 (2009). arXiv:0812.0777 [physics.comp-ph]

    Article  ADS  Google Scholar 

  267. Dmitrašinović, V., Sato, T., Šuvakov, M.: Low-lying spectrum of the \(Y\)-string three-quark potential using hyper-spherical coordinates. Eur. Phys. J. C 62, 383–397 (2009). arXiv:0906.2327 [hep-ph]

    Article  ADS  Google Scholar 

  268. Semay, C., Silvestre-Brac, B.: Diquonia and potential models. Z. Phys. C 61, 271–275 (1994)

    Article  ADS  Google Scholar 

  269. Janc, D., Rosina, M.: The \(T_{cc} = D D^*\) molecular state. Few Body Syst. 35, 175–196 (2004). arXiv:hep-ph/0405208

    ADS  Google Scholar 

  270. Vijande, J., Weissman, E., Valcarce, A., Barnea, N.: Are there compact heavy four-quark bound states? Phys. Rev. D 76, 094027 (2007c). arXiv:0710.2516 [hep-ph]

    Article  ADS  Google Scholar 

  271. Vijande, J., Valcarce, A., Richard, J.M., Sorba, P.: Search for doubly-heavy dibaryons in a quark model. Phys. Rev. D 94, 034038 (2016). arXiv:1608.03982 [hep-ph]

    Article  ADS  Google Scholar 

  272. Hartree, D.R.: The Calculation of Atomic Structures. Wiley, New York (1957)

    MATH  Google Scholar 

  273. Quigg, C., Rosner, J.L.: Quantum mechanics with applications to quarkonium. Phys. Rep. 56, 167–235 (1979)

    Article  ADS  MathSciNet  Google Scholar 

  274. Grosse, H., Martin, A.: Exact results on potential models for quarkonium systems. Phys. Rep. 60, 341 (1980)

    Article  ADS  MathSciNet  Google Scholar 

  275. Grosse, H., Martin, A.: Particle physics and the Schrödinger Equation; new ed., Cambridge monographs on particle physics, nuclear physics, and cosmology (Cambridge Univ., Cambridge, 2005)

  276. Richard, J.-M., Taxil, P.: The ordering of low lying bound states of three identical particles. Nucl. Phys. B 329, 310–326 (1990)

    Article  ADS  Google Scholar 

  277. Stancu, F., Stassart, P.: Negative parity nonstrange baryons. Phys. Lett. B 269, 243–246 (1991)

    Article  ADS  Google Scholar 

  278. Richard, J.M.: The nonrelativistic three-body problem for baryons. Phys. Rep. 212, 1–76 (1992)

    Article  ADS  Google Scholar 

  279. Mitroy, J., et al.: Theory and application of explicitly correlated Gaussians. Rev. Mod. Phys. 85, 693 (2013)

  280. Hiyama, E., Kino, Y., Kamimura, M.: Gaussian expansion method for few-body systems. Prog. Part. Nucl. Phys. 51, 223–307 (2003)

    Article  ADS  Google Scholar 

  281. Anselmino, M., Predazzi, E., Ekelin, S., Sverker, F., Lichtenberg, D.B.: Diquarks. Rev. Mod. Phys. 65, 1199–1234 (1993)

    Article  ADS  Google Scholar 

  282. Brodsky, S.J., de Téramond, G.F., Dosch, H., Lorcé, C.: Meson/Baryon/Tetraquark Supersymmetry from Superconformal Algebra and Light-Front Holography, Conference on New Physics at the Large Hadron Collider Singapore, Singapore, February 29-March 4, 2016. Int. J. Mod. Phys. A31, 1630029 (2016), arXiv:1606.04638 [hep-ph]

  283. Lichtenberg, D.B., Roncaglia, R., Predazzi, E.: Predicting exotic hadron masses from supersymmetry and a quark-diquark model. J. Phys. G23, 865–874 (1997)

    Article  ADS  Google Scholar 

  284. Grach, I.L., Narodetsky, I.M.: Diquark correlations in the proton. Few Body Syst. 16, 151–163 (1994)

    Article  ADS  Google Scholar 

  285. Fleck, S., Silvestre-Brac, B., Richard, J.M.: Search for diquark clustering in Baryons. Phys. Rev. D 38, 1519–1529 (1988)

    Article  ADS  Google Scholar 

  286. Martin, A.: Regge trajectories in the quark model. Z. Phys. C 32, 359 (1986)

    Article  ADS  MathSciNet  Google Scholar 

  287. Braaten, E., Langmack, C., Hudson, S.D.: Born-Oppenheimer approximation for the \(XYZ\) mesons. Phys. Rev. D 90, 014044 (2014). arXiv:1402.0438 [hep-ph]

    Article  ADS  Google Scholar 

  288. Dubynskiy, S., Voloshin, M.B.: Hadro-Charmonium. Phys. Lett. B 666, 344–346 (2008). arXiv:0803.2224 [hep-ph]

    Article  ADS  Google Scholar 

  289. Voloshin, M.B.: \(Z_c(3900)\); What is inside? Phys. Rev. D 87, 091501 (2013). arXiv:1304.0380 [hep-ph]

    Article  ADS  Google Scholar 

  290. Wu, T.T., Wu, S.L.: Augmented standard model and the simplest scenario. Int. J. Mod. Phys. A 30, 1550201 (2015)

    Article  ADS  MathSciNet  MATH  Google Scholar 

  291. Ikaros, I.Y., Bigi, D., Yuri, L., Khoze, V.A., Kuhn, J.H., Zerwas, P.M.: Production and decay properties of ultraheavy quarks. Phys. Lett. B 181, 157–163 (1986)

    Article  ADS  Google Scholar 

  292. Luo, M., Wang, K., Tao, X., Zhang, L., Zhu, G.: Squarkonium, diquarkonium, and octetonium at the LHC and their diphoton decays. Phys. Rev. D 93, 055042 (2016). arXiv:1512.06670 [hep-ph]

    Article  ADS  Google Scholar 

  293. Backović, M.: A Theory of Ambulance Chasing (2016). arXiv:1603.01204 [physics.soc-ph]

  294. Hey, A.J.G., Kelly, R.L.: Baryon spectroscopy. Phys. Rep. 96, 71 (1983)

    Article  ADS  Google Scholar 

  295. Dytman, S.A.: Impact of recent data on N* structure. In: ICTP 4th International Conference on Perspectives in Hadronic Physics Trieste, Italy, May 12–16, 2003, Eur. Phys. J. A 19( Suppl 1), 61–65 (2004), [61 (2004)]

  296. Briceno, R.A., et al.: Issues and opportunities in exotic hadrons. Chin. Phys. C 40, 042001 (2016). arXiv:1511.06779 [hep-ph]

    Article  ADS  Google Scholar 

  297. Jaffe, R.L., Low, F.E.: The connection between quark model eigenstates and low-energy scattering. Phys. Rev. D 19, 2105–2118 (1979)

    Article  ADS  Google Scholar 

  298. Fredriksson, S., Jändel, M.: The diquark deuteron. Phys. Rev. Lett. 48, 14 (1982)

    Article  ADS  Google Scholar 

  299. Maiani, L., Polosa, A.D., Riquer, V.: From pentaquarks to dibaryons in \(\Lambda _b\)(5620) decays. Phys. Lett. B 750, 37–38 (2015). arXiv:1508.04459 [hep-ph]

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to J.-M. Richard.

Additional information

This article belongs to the special issue “30th anniversary of Few-Body Systems”.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Richard, JM. Exotic Hadrons: Review and Perspectives. Few-Body Syst 57, 1185–1212 (2016). https://doi.org/10.1007/s00601-016-1159-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00601-016-1159-0