The decays Bc+ → J/ψ Ds+ and Bc+ → J/ψ Ds*+ 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/ψ Ds+)/B(Bc+ → J/ψ π+) = 2.90 ± 0.57 ± 0.24, B(Bc+ → J/ψ Ds*+)/B(Bc+ → J/ψ Ds+) = 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 m_Bc+ = 6276.28 ± 1.44(stat) ± 0.36(syst) MeV/c2, using the Bc+ → J/ψ Ds+ decay mode.

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2013). Observation of Bc+ → J/ψ Ds+ and Bc+ → J/ψ Ds*+ Decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(11), 1-10 [10.1103/PhysRevD.87.112012].

Observation of Bc+ → J/ψ Ds+ and Bc+ → J/ψ Ds*+ Decays

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

Abstract

The decays Bc+ → J/ψ Ds+ and Bc+ → J/ψ Ds*+ 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/ψ Ds+)/B(Bc+ → J/ψ π+) = 2.90 ± 0.57 ± 0.24, B(Bc+ → J/ψ Ds*+)/B(Bc+ → J/ψ Ds+) = 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 m_Bc+ = 6276.28 ± 1.44(stat) ± 0.36(syst) MeV/c2, using the Bc+ → J/ψ Ds+ decay mode.
2013
R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2013). Observation of Bc+ → J/ψ Ds+ and Bc+ → J/ψ Ds*+ Decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(11), 1-10 [10.1103/PhysRevD.87.112012].
R. Aaij; C. Abellan Beteta; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/155100
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