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Title: J / ψ production at low transverse momentum in p + p and d + Au collisions at s N N = 200 GeV

In this paper, we report on the measurement of J/ψ production in the dielectron channel at midrapidity (|y| < 1) in p + p and d + Au collisions at s N N = 200 from the STAR experiment at the Relativistic Heavy Ion Collider. The transverse momentum p T spectra in p + p for p T < 4 GeV/c and d + Au collisions for p T < 3 GeV/c are presented. These measurements extend the STAR coverage for J/ψ production in p + p collisions to low p T . The < p$$2\atop{T}$$ > from the measured J/ψ invariant cross section in p + p and d + Au collisions are evaluated and compared to similar measurements at other collision energies. The nuclear modification factor for J/ψ is extracted as a function of p T and collision centrality in d + Au and compared to model calculations using the modified nuclear parton distribution function and a final-state J/ψ nuclear absorption cross section.
  1. AGH University of Science and Technology, FPACS (Poland). et al.
Publication Date:
Report Number(s):
Journal ID: ISSN 2469-9985; PRVCAN; R&D Project: PO 004; KB0202012
Grant/Contract Number:
SC00112704; AC02-05CH11231
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 93; Journal Issue: 6; Journal ID: ISSN 2469-9985
American Physical Society (APS)
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Orgs:
STAR Collaboration
Country of Publication:
United States
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Relativistic heavy-ion collisions; hadron-hadron interactions; nucleon induced nuclear reactions; particle and resonance production; quard-gluon plasma
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1256768; OSTI ID: 1459371