Observation of $B^+_c \rightarrow J/\psi D_s^+$ and $B^+_c \rightarrow J/\psi D_s^{*+}$ decays

Aaij, R; Abellan Beteta, C; Adeva, B; Adinolfi, M; Adrover, C; Affolder, A; Ajaltouni, Z; Albrecht, J; Alessio, F; Alexander, M

doi:10.1103/PhysRevD.87.112012

Observation of $B^+_c \rightarrow J/\psi D_s^+$ and $B^+_c \rightarrow J/\psi D_s^{*+}$ decays

LHCb

Collaboration

Apr 16, 2013

10 pages

Published in:

Phys.Rev.D 87 (2013) 11, 112012,
Phys.Rev.D 89 (2014) 1, 019901 (addendum)

Published: Jun 28, 2013

e-Print:

1304.4530 [hep-ex]

DOI:

PDG:

{{\mathit B}_{{{c}}}^{+}}

\rightarrow

{{\mathit J / \psi}{(1S)}}{{\mathit D}_{{{s}}}^{+}}

Report number:

CERN-PH-EP-2013-051,
LHCB-PAPER-2013-010

Experiments:

CERN-LHC-LHCb

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Abstract: (APS)

The decays Bc+→J/ψDs+ and Bc+→J/ψDs*+ 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(Bc+→J/ψDs+)B(Bc+→J/ψπ+)=2.90±0.57±0.24, B(Bc+→J/ψDs*+)B(Bc+→J/ψDs+)=2.37±0.56±0.10, where the first uncertainties are statistical and the second systematic. The mass of the Bc+ meson is measured to be mBc+=6276.28±1.44(stat)±0.36(syst) MeV/c2, using the Bc+→J/ψDs+ decay mode.

Note:

20 pages, 4 figures

13.25.Hw
13.25.-k
B/c+
branching ratio
branching ratio: ratio: measured
p p: scattering
LHC-B
B/c+: hadronic decay
experimental results
CERN LHC Coll

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