Observation of B[+ over c] → J/ψD[+ over s] and B[+ over c] → J/ψD[* over s][superscript +] decays
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Aaij-2013-Observation of B+.pdf
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427.28 KB
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Author(s)
Williams, Michael
Date Issued
December 2013
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
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Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.87.112012
