A1 Journal article (refereed)
J/ψ and ψ(2S) production at forward rapidity in p+p collisions at √s = 510 GeV (2020)

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

JYU authors or editors

Publication details

All authors or editors: PHENIX Collaboration

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2020

Volume: 101

Issue number: 5

Article number: 052006

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.101.052006

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68513

Publication is parallel published: https://arxiv.org/abs/1912.13424

Abstract

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

Keywords: particle physics

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2