Observation of B+c→J/ψD+s and B+c→J/ψD∗+s decays

LHCb Collaboration; et al; Bernet, R; Müller, K; Steinkamp, O; Straumann, U; Vollhardt, A (2013). Observation of B+c→J/ψD+s and B+c→J/ψD∗+s decays. Physical Review D (Particles, Fields, Gravitation and Cosmology), 87(11):112012.

Abstract

The decays B+c→J/ψD+s and B+c→J/ψD*+s are observed for the first time using a dataset, corresponding to an integrated luminosity of 3  fb−1, collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of s√=7 and 8 TeV. The statistical significance for both signals is in excess of 9 standard deviations. The following ratios of branching fractions are measured to be B(B+c→J/ψD+s)B(B+c→J/ψπ+)=2.90±0.57±0.24, B(B+c→J/ψD*+s)B(B+c→J/ψD+s)=2.37±0.56±0.10, where the first uncertainties are statistical and the second systematic. The mass of the B+c meson is measured to be mB+c=6276.28±1.44(stat)±0.36(syst)  MeV/c2, using the B+c→J/ψD+s decay mode.

The decays B+c→J/ψD+s and B+c→J/ψD*+s are observed for the first time using a dataset, corresponding to an integrated luminosity of 3  fb−1, collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of s√=7 and 8 TeV. The statistical significance for both signals is in excess of 9 standard deviations. The following ratios of branching fractions are measured to be B(B+c→J/ψD+s)B(B+c→J/ψπ+)=2.90±0.57±0.24, B(B+c→J/ψD*+s)B(B+c→J/ψD+s)=2.37±0.56±0.10, where the first uncertainties are statistical and the second systematic. The mass of the B+c meson is measured to be mB+c=6276.28±1.44(stat)±0.36(syst)  MeV/c2, using the B+c→J/ψD+s decay mode.

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Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 2013 21 Feb 2014 07:41 05 Apr 2016 17:35 American Physical Society 1550-2368 https://doi.org/10.1103/PhysRevD.87.112012
Permanent URL: https://doi.org/10.5167/uzh-91684