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Measurement of B meson production cross-sections in proton-proton collisions at sqrt(s)= 7 TeV

Abstract : The production cross-sections of B mesons are measured using data, corresponding to a integrated luminosity of 0.36 fb-1, collected with the LHCb detector at a centre-of-mass energy of 7 TeV. The B+, B0 and Bs0 mesons are reconstructed in the exclusive decays B+ -> J/psi K+, B0 -> J/psi K*0 and Bs0 -> J/psi phi, with J/psi -> mu+ mu-, K*0 -> K+ pi- and phi -> K+ K-. The differential cross-sections as functions of B meson transverse momentum pT and rapidity y, in the range 0 < pT < 40 GeV/c and 2.0 < y < 4.5, are measured. The integrated cross-sections in the same pT and y range, including charge-conjugate states, are measured to be sigma(pp -> B+ + X) = 38.9 +- 0.3 (stat.) +- 2.5 (syst.) +- 1.3 (norm.) mub, sigma(pp -> B0 + X) = 38.1 +- 0.6 (stat.) +- 3.7 (syst.) +- 4.7 (norm.) mub, sigma(pp -> Bs0 + X) = 10.5 +- 0.2 (stat.) +- 0.8 (syst.) +- 1.0 (norm.) mub, where the third uncertainty arises from the pre-existing branching fraction measurements.
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http://hal.in2p3.fr/in2p3-00835161
Contributor : Sabine Starita <>
Submitted on : Tuesday, June 18, 2013 - 10:41:42 AM
Last modification on : Wednesday, December 2, 2020 - 4:40:02 PM

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R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Measurement of B meson production cross-sections in proton-proton collisions at sqrt(s)= 7 TeV. Journal of High Energy Physics, Springer, 2013, 8, pp.117. ⟨10.1007/JHEP08(2013)117⟩. ⟨in2p3-00835161⟩

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