Measurement of Ds± production asymmetry in pp collisions at √s=7 and 8 TeV

The LHCb Collaboration

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The inclusive Ds ± production asymmetry is measured in pp collisions collected by the LHCb experiment at centre-of-mass energies of s=7 and 8 TeV. Promptly produced Ds ± mesons are used, which decay as Ds ± → ϕπ±, with ϕ → K+K−. The measurement is performed in bins of transverse momentum, pT, and rapidity, y, covering the range 2.5 < pT< 25.0 GeV/c and 2.0 < y < 4.5. No kinematic dependence is observed. Evidence of nonzero Ds ± production asymmetry is found with a significance of 3.3 standard deviations.
Original languageEnglish
Article number8
Number of pages21
JournalJournal of High Energy Physics
Issue number8
Publication statusPublished - 2018
Externally publishedYes


  • Charm physics
  • Forward physics
  • Hadron-Hadron scattering (experiments)
  • Heavy quark production
  • QCD

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