Measurement of the ratio of the production cross sections times branching fractions of Bc+/- to J/psi pi+/- and B+/- to J/psi K+/- and B(Bc+/- to J/psi pi+/- pi+/- pi-/+)/B(Bc+/- to J/psi pi+/-) in pp collisions at sqrt(s) = 7 TeV

Abstract : The Bc+/- to J/psi pi+/- and Bc+/- to J/psi pi+/- pi+/- pi-/+ decay modes are studied in proton-proton collisions at a center-of-mass energy of 7 TeV with the CMS detector at the LHC. The kinematic region investigated requires Bc+/- mesons with transverse momentum pt > 15 GeV and rapidity abs(y) < 1.6. The data sample corresponds to an integrated luminosity of 5.1 inverse femtobarns. The ratio of the branching fractions B(Bc+/- to J/psi pi+/- pi+/- pi-/+)/B(Bc+/- to J/psi pi+/-) is measured to be 2.55 +/- 0.80 (stat) +/- 0.33 (syst) +0.04/-0.01 (tau[Bc+]). The ratio of the production cross sections times branching fractions (sigma(Bc+) B(Bc+ to J/psi pi+))/ (sigma(B+) B(B+ to J/psi K+)) is determined to be [0.48 +/- 0.05 (stat) +/- 0.03 (syst) +/- 0.05 (tau_{Bc})]%
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Journal of High Energy Physics, Springer, 2015, 01(2015), pp.063. 〈10.1007/JHEP01(2015)063〉
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http://hal.in2p3.fr/in2p3-01077238
Contributeur : Dominique Girod <>
Soumis le : vendredi 24 octobre 2014 - 11:21:56
Dernière modification le : jeudi 10 mai 2018 - 01:59:13

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V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Measurement of the ratio of the production cross sections times branching fractions of Bc+/- to J/psi pi+/- and B+/- to J/psi K+/- and B(Bc+/- to J/psi pi+/- pi+/- pi-/+)/B(Bc+/- to J/psi pi+/-) in pp collisions at sqrt(s) = 7 TeV. Journal of High Energy Physics, Springer, 2015, 01(2015), pp.063. 〈10.1007/JHEP01(2015)063〉. 〈in2p3-01077238〉

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