First measurement of charm production in its fixed-target configuration at the LHC

LHCb Collaboration

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Abstract

The first measurement of heavy-flavor production by the LHCb experiment in its fixed-target mode is presented. The production of  J/ψ  and  Dmesons is studied with beams of protons of different energies colliding with gaseous targets of helium and argon with nucleon-nucleon center-of-mass energies of  √sNN = 86.6  and 110.4 GeV, respectively. The  J/ψ  and Dproduction cross sections in  pHe collisions in the rapidity range [2, 4.6]are found to be σJ/ψ = 652 ± 33 (stat) ± 42 (syst) nb/nucleon and σD0 = 80.8 ± 2.4 ( stat ) ± 6.3 (syst) μb/nucleon, where the first uncertainty is statistical and the second is systematic. No evidence for a substantial intrinsic charm content of the nucleon is observed in the large Bjorken- x  region. 

Original languageEnglish
Article number132002
Number of pages12
JournalPhysical Review Letters
Volume122
Issue number13
DOIs
Publication statusPublished - 2 Apr 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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