Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

J/ψ and ψ (2S) production at forward rapidity in p+p collisions at s =510 GeV

Acharya, U.A. ; Oskarsson, A. LU ; Silvermyr, D. LU orcid and Zou, L. (2020) In Physical Review D 101(5).
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... (More)
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 d 10 GeV/c)=54.3±0.5(stat)±5.5(syst) nb. (Less)
Please use this url to cite or link to this publication:
author
; ; and
author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
101
issue
5
article number
052006
publisher
American Physical Society
external identifiers
  • scopus:85083446113
ISSN
2470-0010
DOI
10.1103/PhysRevD.101.052006
language
English
LU publication?
yes
id
4d9463e7-fbb2-4899-a446-84c2df2eeecc
date added to LUP
2022-04-07 10:41:05
date last changed
2023-04-02 23:19:08
@article{4d9463e7-fbb2-4899-a446-84c2df2eeecc,
  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 d 10 GeV/c)=54.3±0.5(stat)±5.5(syst) nb.}},
  author       = {{Acharya, U.A. and Oskarsson, A. and Silvermyr, D. and Zou, L.}},
  issn         = {{2470-0010}},
  language     = {{eng}},
  number       = {{5}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D}},
  title        = {{J/ψ and ψ (2S) production at forward rapidity in p+p collisions at s =510 GeV}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.101.052006}},
  doi          = {{10.1103/PhysRevD.101.052006}},
  volume       = {{101}},
  year         = {{2020}},
}