Prompt and non-prompt J/ψ production in pp collisions at √s = 7 TeV
The production of J/ψ mesons is studied in pp collisions at √s = 7 TeV with the CMS experiment at the LHC. The measurement is based on a dimuon sample corresponding to an integrated luminosity of 314 nb[superscript -1]. The J/ψ differential cross section is determined, as a function of the J/ψ trans...
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Other Authors: | |
Format: | Article |
Published: |
Springer Nature
2018
|
Online Access: | http://hdl.handle.net/1721.1/116909 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0002-2822-3375 https://orcid.org/0000-0001-8189-3741 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 |
Summary: | The production of J/ψ mesons is studied in pp collisions at √s = 7 TeV with the CMS experiment at the LHC. The measurement is based on a dimuon sample corresponding to an integrated luminosity of 314 nb[superscript -1]. The J/ψ differential cross section is determined, as a function of the J/ψ transverse momentum, in three rapidity ranges. A fit to the decay length distribution is used to separate the prompt from the non-prompt (b hadron to J/ψ) component. Integrated over J/ψ transverse momentum from 6.5 to 30 GeV/c and over rapidity in the range |y| < 2.4, the measured cross sections, times the dimuon decay branching fraction, are 70.9 ± 2.1(stat.) ± 3.0(syst.) ± 7.8(luminosity) nb for prompt J/ψ mesons assuming unpolarized production and 26.0 ± 1.4(stat.) ± 1.6(syst.) ± 2.9(luminosity) nb for J/ψ mesons from b-hadron decays. © CERN for the benefit of the CMS collaboration 2011. |
---|