TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Oyanguren, A.
AU  - Ruiz Valls, P.
PY  - 2013
DA  - 2013//
TI  - Observation of B-c(+) -> J/ psi D-s(+) and B-c(+) -> J/ psi D-s*(+) decays
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 112012 - 10pp
VL  - 87
IS  - 11
PB  - Amer Physical Soc
AB  - The decays B-c(+) -> J/ psi D-s(+) and B-c(+) -> J/ psi D-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 root 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/ psi D-s(+))/B(B-c(+) -> J/ psi pi(+)) = 2.90 +/- 0.57 +/- 0.24, B(B-c(+) -> J/psi D-s*(+))/B(B-c(+) -> J/ psi D-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 m(Bc+) = 6276.28 +/- 1.44(stat) +/- 0.36(syst) MeV/c(2), using the B-c(+) -> J/ psi D-s(+) decay mode.
SN  - 1550-7998
UR  - http://arxiv.org/abs/arXiv:1304.4530
UR  - https://doi.org/10.1103/PhysRevD.87.112012
DO  - 10.1103/PhysRevD.87.112012
LA  - English
N1  - WOS:000321070100001
ID  - LHCbCollaborationAaij_etal2013
ER  -