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Excited ρ mesons in Bc→ψ(′)KKS decays

A. V. Luchinsky
Phys. Rev. D 99, 036019 – Published 27 February 2019
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  • INTRODUCTION
  • τ→ντKKS DECAYS
  • Bc→ψ(′)KKS DECAYS
  • CONCLUSION
  • ACKNOWLEDGMENTS
  • APPENDICES
    • References

    Abstract

    In this paper, exclusive decays Bc→J/ψKKS and Bc→ψ(2S)KKS are analyzed. It is shown that contributions of the excited ρ mesons should be taken into account to describe these decays. It is also shown that, unlike the corresponding τ lepton decays, peaks in mKKS distributions caused by these resonances are clearly seen and can be easily separated. Theoretical predictions for the branching fractions of the reactions and mψK distributions are also presented.

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    • Received 8 January 2019

    DOI:https://doi.org/10.1103/PhysRevD.99.036019

    Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

    Published by the American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Branching fraction
    1. Physical Systems
    QuarkoniaVector mesons
    Particles & Fields

    Authors & Affiliations

    A. V. Luchinsky

    • A.A. Logunov Institute for High Energy Physics, NRC Kurchatov Institute, 142281 Protvino, Russian Federation

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    Issue

    Vol. 99, Iss. 3 — 1 February 2019

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    Images

    • Figure 1
      Figure 1

      Feynman diagram for τ→ντKKS decay.

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    • Figure 2
      Figure 2

      Transferred momentum distribution of τ→ντKKS decay (a), τ→ντμν¯μ decay (b), and ρTKKS spectral function (c).

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    • Figure 3
      Figure 3

      Feynman diagram for Bc→KKS decay.

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    • Figure 4
      Figure 4

      Bc→J/ψW form factors. Solid blue and dashed red lined correspond to SR and PM form factor sets, respectively.

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    • Figure 5
      Figure 5

      Bc→J/ψμν and Bc→J/ψKKS distributions. Solid blue and dashed red lines correspond to SR and PM form factor sets, respectively. Vertical dashed lines show the position of excited ρ resonances.

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    • Figure 6
      Figure 6

      Bc→ψ(2S)W form factors. Notations are the same as in Fig. 4.

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    • Figure 7
      Figure 7

      Bc→ψ(2S)μν and Bc→ψ(2S)KKS distributions. Notations are the same as in Fig. 5.

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