First Observation of a Baryonic Bc+ Decay
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 3.0 fb-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.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 2014
- DOI:
- 10.1103/PhysRevLett.113.152003
- arXiv:
- arXiv:1408.0971
- Bibcode:
- 2014PhRvL.113o2003A
- Keywords:
-
- 14.40.Nd;
- 12.39.St;
- 13.25.Hw;
- Bottom mesons;
- Factorization;
- Decays of bottom mesons;
- High Energy Physics - Experiment
- E-Print:
- 20 pages, 2 figures