Prompt and non-prompt J/ψ production in pp collisions at $\sqrt{s} = 7$ TeV

Khachatryan, V.

doi:10.1140/epjc/s10052-011-1575-8

Cited by 156 publications

(109 citation statements)

References 56 publications

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“…They are compared with our previous results published in ref. [7], which are statistically independent and remain of interest since they partially overlap with the present results and cover a lower p T range. A good agreement is observed.…”

Section: Inclusive Cross Section Determinationsupporting

confidence: 77%

“…The sample is selected to have consistent trigger requirements for the data used in the analysis and without overlap with the sample used in ref. [7]. It corresponds to a total integrated luminosity of 36.7 ± 1.5 pb −1 [14].…”

Section: Data Selection and Event Reconstructionmentioning

confidence: 99%

“…[7]. Muon candidates are reconstructed from the combination of muon-detector and silicon-tracker hits.…”

Section: Data Selection and Event Reconstructionmentioning

confidence: 99%

“…In addition to calibrations already applied to the data [20][21][22], residual effects are determined by studying the dependence of the reconstructed dimuon peak shapes on the muon kinematics, as was done in ref. [7].…”

Section: Jhep02(2012)011mentioning

confidence: 99%

“…The muon transverse momenta in data have been calibrated as described in ref. [7]. A difference in the momentum resolution between data and simulated events would also give a systematic uncertainty on the acceptance.…”

Section: Acceptancementioning

confidence: 99%

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J/ψ and ψ(2S) production in pp collisions at $ \sqrt {s} = 7{\text{Tev}} $

Chatrchyan¹,

Khachatryan²,

Sirunyan³

et al. 2012

J. High Energ. Phys.

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100

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A measurement of the J/ψ and ψ(2S) production cross sections in pp collisions at $ \sqrt {s} = 7{\text{TeV}} $ with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb−1. Using a fit to the invariant mass and decay length distributions, production cross sections have been measured separately for prompt and non-prompt charmonium states, as a function of the meson transverse momentum in several rapidity ranges and integrated in the kinematical regions considered in this study. In addition, cross sections restricted to the acceptance of the CMS detector are given, which are not affected by the polarization of the charmonium states. The ratio of the differential production cross sections of the two states, where systematic uncertainties largely cancel, is also determined. The branching fraction of the inclusive B → ψ(2S)X decay is extracted from the ratio of the non-prompt cross sections to be: $ \mathcal{B}\left( {{\text{B}} \to \psi \left( {\text{2S}} \right)X} \right) = \left( {{3}.0{8}\pm 0.{12}\left( {{\text{stat}}. + {\text{syst}}.} \right)\pm 0.{13}\left( {{\text{theor}}.} \right)\pm 0.{42}\left( {{\mathcal{B}_{\text{PDG}}}} \right)} \right) \times {1}{0^{{ - {3}}}}. $

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Section: Inclusive Cross Section Determinationsupporting

confidence: 77%

Section: Data Selection and Event Reconstructionmentioning

confidence: 99%

“…[7]. Muon candidates are reconstructed from the combination of muon-detector and silicon-tracker hits.…”

Section: Data Selection and Event Reconstructionmentioning

confidence: 99%

Section: Jhep02(2012)011mentioning

confidence: 99%

Section: Acceptancementioning

confidence: 99%