skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Forward J / ψ production at high energy: Centrality dependence and mean transverse momentum

Abstract

Forward rapidity J/$$\psi$$ meson production in proton-nucleus collisions can be an important constraint of descriptions of the small- x nuclear wave function. In an earlier work we studied this process using a dipole cross section satisfying the Balitsky-Kovchegov equation, fit to HERA inclusive data and consistently extrapolated to the nuclear case using a standard Woods-Saxon distribution. In this paper we present further calculations of these cross sections, studying the mean transverse momentum of the meson and the dependence on collision centrality. We also extend the calculation to backward rapidities using nuclear parton distribution functions. Here, we show that the parametrization is overall rather consistent with the available experimental data. However, there is a tendency towards a too strong centrality dependence. This can be traced back to the rather small transverse area occupied by small- x gluons in the nucleon that is seen in the HERA data, compared to the total inelastic nucleon-nucleon cross section.

Authors:
 [1];  [1];  [2]
  1. Univ. of Jyvaskyla (Finland). Dept. of Physics; Univ. of Helsinki (Finland). Helsinki Inst. of Physics
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Academy of Finland
OSTI Identifier:
1351720
Report Number(s):
BNL-113690-2017-JA
Journal ID: ISSN 2470-0010; PRVDAQ; R&D Project: KB0301020; KB0301020; TRN: US1701347
Grant/Contract Number:
SC0012704; 267321; 273464
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Ducloué, B., Lappi, T., and Mäntysaari, H. Forward J/ψ production at high energy: Centrality dependence and mean transverse momentum. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.074031.
Ducloué, B., Lappi, T., & Mäntysaari, H. Forward J/ψ production at high energy: Centrality dependence and mean transverse momentum. United States. doi:10.1103/PhysRevD.94.074031.
Ducloué, B., Lappi, T., and Mäntysaari, H. 2016. "Forward J/ψ production at high energy: Centrality dependence and mean transverse momentum". United States. doi:10.1103/PhysRevD.94.074031. https://www.osti.gov/servlets/purl/1351720.
@article{osti_1351720,
title = {Forward J/ψ production at high energy: Centrality dependence and mean transverse momentum},
author = {Ducloué, B. and Lappi, T. and Mäntysaari, H.},
abstractNote = {Forward rapidity J/$\psi$ meson production in proton-nucleus collisions can be an important constraint of descriptions of the small- x nuclear wave function. In an earlier work we studied this process using a dipole cross section satisfying the Balitsky-Kovchegov equation, fit to HERA inclusive data and consistently extrapolated to the nuclear case using a standard Woods-Saxon distribution. In this paper we present further calculations of these cross sections, studying the mean transverse momentum of the meson and the dependence on collision centrality. We also extend the calculation to backward rapidities using nuclear parton distribution functions. Here, we show that the parametrization is overall rather consistent with the available experimental data. However, there is a tendency towards a too strong centrality dependence. This can be traced back to the rather small transverse area occupied by small- x gluons in the nucleon that is seen in the HERA data, compared to the total inelastic nucleon-nucleon cross section.},
doi = {10.1103/PhysRevD.94.074031},
journal = {Physical Review D},
number = 7,
volume = 94,
place = {United States},
year = 2016,
month =
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 3works
Citation information provided by
Web of Science

Save / Share: