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Title: Observation of an Excited Charm Baryon Ω∗c Decaying to Ω0cγ
Author: Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 6-Dec-2006
Publisher: American Physical Society
Abstract: We report the first observation of an excited singly charmed baryon Ω ∗ c ( c s s ) in the radiative decay Ω 0 c γ , where the Ω 0 c baryon is reconstructed in the decays to the final states Ω − π + , Ω − π + π 0 , Ω − π + π − π + , and Ξ − K − π + π + . This analysis is performed using a data set of 230.7     fb − 1 collected by the BABAR detector at the PEP-II asymmetric-energy B factory at the Stanford Linear Accelerator Center. The mass difference between the Ω ∗ c and the Ω 0 c baryons is measured to be 70.8 ± 1.0 ( stat ) ± 1.1 ( syst )     MeV / c 2 . We also measure the ratio of inclusive production cross sections of Ω ∗ c and Ω 0 c in e + e − annihilation.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2006, vol. 97, num. 23, p. 232001
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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