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Measurement of B meson production cross-sections in proton-proton collisions at s√=7 TeV - Zurich Open Repository and Archive


LHCb Collaboration; et al; Bernet, R; Müller, K; Steinkamp, O; Straumann, U; Vollhardt, A (2013). Measurement of B meson production cross-sections in proton-proton collisions at s√=7 TeV. Journal of High Energy Physics, 2013:117.

Abstract

The production cross-sections of B mesons are measured in pp collisions at a centre-of-mass energy of 7 TeV, using data collected with the LHCb detector corresponding to a integrated luminosity of 0.36 fb−1. The B +, B 0 and B0s mesons are reconstructed in the exclusive decays B + → J/ψK +, B 0 → J/ψK *0 and B0s→J/ψϕ , with J/ψ → μ + μ −, K *0 → K +π− and ϕ → K + K − . The differential cross-sections are measured as functions of B meson transverse momentum p T and rapidity y, in the range 0 < p T < 40 GeV/c and 2.0 < y < 4.5. The integrated cross-sections in the same p T and y ranges, including charge-conjugate states, are measured to be σ(pp→B++X) =38.9±0.3(stat.)±2.5(syst.)±1.3(norm.)μb,σ(pp→B0+X) =38.1±0.6(stat.)±3.7(syst.)±4.7(norm.)μb,σ(pp→B0s+X) =10.5±0.2(stat.)±0.8(syst.)±1.0(norm.)μb, where the third uncertainty arises from the pre-existing branching fraction measurements.

Abstract

The production cross-sections of B mesons are measured in pp collisions at a centre-of-mass energy of 7 TeV, using data collected with the LHCb detector corresponding to a integrated luminosity of 0.36 fb−1. The B +, B 0 and B0s mesons are reconstructed in the exclusive decays B + → J/ψK +, B 0 → J/ψK *0 and B0s→J/ψϕ , with J/ψ → μ + μ −, K *0 → K +π− and ϕ → K + K − . The differential cross-sections are measured as functions of B meson transverse momentum p T and rapidity y, in the range 0 < p T < 40 GeV/c and 2.0 < y < 4.5. The integrated cross-sections in the same p T and y ranges, including charge-conjugate states, are measured to be σ(pp→B++X) =38.9±0.3(stat.)±2.5(syst.)±1.3(norm.)μb,σ(pp→B0+X) =38.1±0.6(stat.)±3.7(syst.)±4.7(norm.)μb,σ(pp→B0s+X) =10.5±0.2(stat.)±0.8(syst.)±1.0(norm.)μb, where the third uncertainty arises from the pre-existing branching fraction measurements.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2013
Deposited On:21 Feb 2014 07:54
Last Modified:05 Apr 2016 17:35
Publisher:Springer
ISSN:1029-8479
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP08(2013)117

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