Using pp collision data corresponding to 1.0 fb^−1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Λ0b π+ π− spectrum with masses 5911.97 ± 0.12(stat) ± 0.02(syst) ± 0.66(Λ0b mass) MeV/c^2 and 5919.77 ± 0.08(stat) ± 0.02(syst) ± 0.66(Λ0b 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 Λ0b baryons, Λ0b*(5912) and Λ0b*(5920).

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2012). Observation of Excited Λ0b Baryons. PHYSICAL REVIEW LETTERS, 109(17), 1-8 [10.1103/PhysRevLett.109.172003].

Observation of Excited Λ0b Baryons

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2012

Abstract

Using pp collision data corresponding to 1.0 fb^−1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Λ0b π+ π− spectrum with masses 5911.97 ± 0.12(stat) ± 0.02(syst) ± 0.66(Λ0b mass) MeV/c^2 and 5919.77 ± 0.08(stat) ± 0.02(syst) ± 0.66(Λ0b 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 Λ0b baryons, Λ0b*(5912) and Λ0b*(5920).
2012
R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2012). Observation of Excited Λ0b Baryons. PHYSICAL REVIEW LETTERS, 109(17), 1-8 [10.1103/PhysRevLett.109.172003].
R. Aaij; C. Abellan Beteta; A. Adametz; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/128794
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