J/ψ and ψ(2S) production at forward rapidity in p+p collisions at √s = 510 GeV
PHENIX Collaboration. (2020). J/ψ and ψ(2S) production at forward rapidity in p+p collisions at √s = 510 GeV. Physical Review D, 101(5), Article 052006. https://doi.org/10.1103/PhysRevD.101.052006
Julkaistu sarjassa
Physical Review DTekijät
Päivämäärä
2020Tekijänoikeudet
© 2020 the Authors
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the differential cross section, mean transverse momentum, mean transverse momentum squared of inclusive J/ψ, and cross section ratio of ψ(2S) to J/ψ at forward rapidity in p+p collisions at √s=510 GeV via the dimuon decay channel. Comparison is made to inclusive J/ψ cross sections measured at √s=200 GeV and 2.76–13 TeV. The result is also compared to leading-order nonrelativistic QCD calculations coupled to a color-glass-condensate description of the low-x gluons in the proton at low transverse momentum (pT) and to next-to-leading order nonrelativistic QCD calculations for the rest of the pT range. These calculations overestimate the data at low pT. While consistent with the data within uncertainties above ≈3 GeV/c, the calculations are systematically below the data. The total cross section times the branching ratio is BR dσJ/ψpp/dy(1.2<|y|<2.2,0
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American Physical SocietyISSN Hae Julkaisufoorumista
2470-0010Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/35188892
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