First Observation of a Baryonic B+c Decay

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Title:	First Observation of a Baryonic B+c Decay
Author:	Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN
Other authors:	Universitat Ramon Llull. La Salle; CERN
Abstract:	A baryonic decay of the B+c meson, B+c→J/ψp¯pπ+, 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 B+c→J/ψπ+ decay as the normalization channel, the ratio of branching fractions is measured to be B(B+c→J/ψp¯pπ+)/B(B+c→J/ψπ+)=0.143+0.039−0.034(stat)±0.013(syst). The mass of the B+c meson is determined as M(B+c)=6274.0±1.8(stat)±0.4(syst) MeV/c2, using the B+c→J/ψp¯pπ+ channel.
Publication date:	2014-10-10
Subject (UDC):	53 - Física
Subject(s):	Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear)
Rights:	© CERN L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/
Pages:	9 p.
Document type:	Article Article - Published version
DOI:	https://doi.org/10.1103/PhysRevLett.113.152003
Published by:	American Physical Society
Publish at:	Physical Review Letters, 2014, Vol. 113, No. 15 (Octubre)
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