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Observation of B[+ over c] → J/ψD[+ over s] and B[+ over c] → J/ψD[* over s][superscript +] decays

Author(s)
Williams, Michael
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Abstract
The decays B[+ over c] → J/ψD[+ over s] and B[+ over c] → J/ψD[*+ over s] are observed for the first time using a dataset, corresponding to an integrated luminosity of 3  fb[superscript −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[+ over c] → J/ψD[+over s]) over B(B[+ over c] → J/ψπ[superscript +])] = 2.90 ± 0.57 ± 0.24, [B(B[+ over c] → J/ψD[*+ over s]) over B(B[+ over c] → J/ψD[+ over s]) = 2.37 ± 0.56 ± 0.10, where the first uncertainties are statistical and the second systematic. The mass of the B[+ over c] meson is measured to be m[subscript B[+ over c]] = 6276.28 ± 1.44(stat) ± 0.36(syst)  MeV/c[superscript 2], using the B[+ over c] → J/ψD[+ over s] decay mode.
Date issued
2013-12
URI
http://hdl.handle.net/1721.1/97448
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaij, R., C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. “Observation of B[+ over c] → J/ψD[+ over s] and B[+ over c] → J/ψD[* over s][superscript +] Decays.” Phys. Rev. D 87, no. 11 (June 2013). © 2013 CERN, for the LHCb Collaboration
Version: Final published version
ISSN
1550-7998
1550-2368

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