A baryonic decay of the Bc+ meson, Bc+→J/ψpp¯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 3.0fb-1 taken at center-of-mass energies of 7 and 8 TeV. With the Bc+→J/ψπ+ decay as the normalization channel, the ratio of branching fractions is measured to be B(Bc+→J/ψpp¯π+)/B(Bc+→J/ψπ+)=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/ψpp¯π+ channel.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2014). First observation of a baryonic Bc+ decay. PHYSICAL REVIEW LETTERS, 113(15) [10.1103/PhysRevLett.113.152003].

First observation of a baryonic Bc+ decay

Borsato, M;CALVI, MARTA;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;KUCHARCZYK, MARCIN;Martinelli, M;
2014

Abstract

A baryonic decay of the Bc+ meson, Bc+→J/ψpp¯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 3.0fb-1 taken at center-of-mass energies of 7 and 8 TeV. With the Bc+→J/ψπ+ decay as the normalization channel, the ratio of branching fractions is measured to be B(Bc+→J/ψpp¯π+)/B(Bc+→J/ψπ+)=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/ψpp¯π+ channel.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (all)
English
2014
113
15
152003
none
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2014). First observation of a baryonic Bc+ decay. PHYSICAL REVIEW LETTERS, 113(15) [10.1103/PhysRevLett.113.152003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/89348
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