Using pp collision data corresponding to 1.0fb -1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Λb0π +π - spectrum with masses 5911.97±0.12(stat)±0.02(syst)±0.66(Λb0mass)MeV/c2 and 5919.77±0.08(stat)±0.02(syst)±0.66(Λb0mass)MeV/ c2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally excited Λb0 baryons, Λb*0(5912) and Λb*0(5920). © 2012 CERN. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.
Aaij, R., Abellan Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2012). Observation of Excited Λb0 Baryons. PHYSICAL REVIEW LETTERS, 109(17) [10.1103/PhysRevLett.109.172003].
Observation of Excited Λb0 Baryons
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2012
Abstract
Using pp collision data corresponding to 1.0fb -1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Λb0π +π - spectrum with masses 5911.97±0.12(stat)±0.02(syst)±0.66(Λb0mass)MeV/c2 and 5919.77±0.08(stat)±0.02(syst)±0.66(Λb0mass)MeV/ c2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally excited Λb0 baryons, Λb*0(5912) and Λb*0(5920). © 2012 CERN. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.
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