First Measurement of Charm Production in its Fixed-Target Configuration at the LHC

Academic Article


  • © 2019 CERN. for the LHCb Collaboration. The first measurement of heavy-flavor production by the LHCb experiment in its fixed-target mode is presented. The production of J/ψ and D0 mesons 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 D0 production 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.
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    Author List

  • Aaij R; Adeva B; Adinolfi M; Aidala CA; Ajaltouni Z; Akar S; Albicocco P; Albrecht J; Alessio F; Alexander M
  • Volume

  • 122
  • Issue

  • 13