A baryonic decay of the Bc+ meson, Bc+ → J/ψ p anti-p π+, is observed for the first time, with a significance of 7.3 standard deviations, in pp collision data collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb^−1 taken at center-of-mass energies of 7 and 8 TeV. With the Bc+ → J/ψ π+ decay as the normalization channel, the ratio of branching fractions is measured to be B(Bc+ → J/ψ p anti-p π+)/B(Bc+ → J/ψ π+) = 0.143{−0.034}{+0.039}(stat) ± 0.013(syst). The mass of the Bc+ meson is determined as M(Bc+) = 6274.0 ± 1.8(stat) ± 0.4(syst) MeV/c2, using the Bc+ → J/ψ p anti-p π+ channel.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). First Observation of a Baryonic Bc+ Decay. PHYSICAL REVIEW LETTERS, 113(15), 1-9 [10.1103/PhysRevLett.113.152003].

First Observation of a Baryonic Bc+ Decay

CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

A baryonic decay of the Bc+ meson, Bc+ → J/ψ p anti-p π+, is observed for the first time, with a significance of 7.3 standard deviations, in pp collision data collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb^−1 taken at center-of-mass energies of 7 and 8 TeV. With the Bc+ → J/ψ π+ decay as the normalization channel, the ratio of branching fractions is measured to be B(Bc+ → J/ψ p anti-p π+)/B(Bc+ → J/ψ π+) = 0.143{−0.034}{+0.039}(stat) ± 0.013(syst). The mass of the Bc+ meson is determined as M(Bc+) = 6274.0 ± 1.8(stat) ± 0.4(syst) MeV/c2, using the Bc+ → J/ψ p anti-p π+ channel.
2014
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). First Observation of a Baryonic Bc+ Decay. PHYSICAL REVIEW LETTERS, 113(15), 1-9 [10.1103/PhysRevLett.113.152003].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/355322
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