Observation of excited Λ b 0 baryons
R Aaij, C Abellan Beteta, A Adametz, B Adeva… - Physical Review Letters, 2012 - APS
R Aaij, C Abellan Beteta, A Adametz, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni…
Physical Review Letters, 2012•APSUsing pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the
LHCb detector, two narrow states are observed in the Λ b 0 π+ π-spectrum with masses
5911.97±0.12 (stat)±0.02 (syst)±0.66 (Λ b 0 mass) MeV/c 2 and 5919.77±0.08 (stat)±0.02
(syst)±0.66 (Λ b 0 mass) MeV/c 2. The significances of the observations are 5.2 and 10.2
standard deviations, respectively. These states are interpreted as the orbitally excited Λ b 0
baryons, Λ b* 0 (5912) and Λ b* 0 (5920).
LHCb detector, two narrow states are observed in the Λ b 0 π+ π-spectrum with masses
5911.97±0.12 (stat)±0.02 (syst)±0.66 (Λ b 0 mass) MeV/c 2 and 5919.77±0.08 (stat)±0.02
(syst)±0.66 (Λ b 0 mass) MeV/c 2. The significances of the observations are 5.2 and 10.2
standard deviations, respectively. These states are interpreted as the orbitally excited Λ b 0
baryons, Λ b* 0 (5912) and Λ b* 0 (5920).
Using collision data corresponding to integrated luminosity collected by the LHCb detector, two narrow states are observed in the spectrum with masses 5911.97±0.12(stat)±0.02(syst)±0.66(Λb0 mass) MeV/c2 and 5919.77±0.08(stat)±0.02(syst)±0.66(Λb0 mass) MeV/c2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally excited baryons, and .
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