%0 Journal Article
%T Observation of B-c(+) -> J/ psi D-s(+) and B-c(+) -> J/ psi D-s*(+) decays
%A LHCb Collaboration (Aaij, R. et al
%A Oyanguren, A.
%A Ruiz Valls, P.
%J Physical Review D
%D 2013
%V 87
%N 11
%I Amer Physical Soc
%@ 1550-7998
%G English
%F LHCbCollaborationAaij_etal2013
%O WOS:000321070100001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1483), last updated on Thu, 01 Aug 2013 14:08:38 +0000
%X 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.
%R 10.1103/PhysRevD.87.112012
%U http://arxiv.org/abs/arXiv:1304.4530
%U https://doi.org/10.1103/PhysRevD.87.112012
%P 112012 - 10pp