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Title: Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions at s NN = 200 GeV

Abstract

The BRAHMS collaboration has measured transverse momentum spectra of pions, kaons, protons, and antiprotons at rapidities 0 and 3 for Cu+Cu collisions at s NN = 200 GeV. As the collisions become more central the collective radial flow increases while the temperature of kinetic freeze-out decreases. The temperature is lower and the radial flow weaker at forward rapidity. Pion and kaon yields with transverse momenta between 1.5 and 2.5 GeV/c are suppressed for central collisions relative to scaled p + p collisions. This suppression, which increases as the collisions become more central, is consistent with jet quenching models and is also present with comparable magnitude at forward rapidity. At such rapidities, initial state effects may also be present and persistence of the meson suppression to high rapidity may reflect a combination of jet quenching and nuclear shadowing. In conclusion, the ratio of protons to mesons increases as the collisions become more central and is largest at forward rapidities.

Authors:
 [1]
  1. Univ. of Oslo (Norway). Department of Physics. et al.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Org.:
BRAHMS Collaboration
OSTI Identifier:
1340370
Alternate Identifier(s):
OSTI ID: 1266411
Report Number(s):
BNL-112479-2016-JA
Journal ID: ISSN 2469-9985; R&D Project: PO 004; KB0202012; TRN: US1701777
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 1; Journal ID: ISSN 2469-9985
Publisher:
APS
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Relativistic Heavy Ion Collider

Citation Formats

Arsene, I. C. Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions at sNN=200 GeV. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.94.014907.
Arsene, I. C. Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions at sNN=200 GeV. United States. doi:10.1103/PhysRevC.94.014907.
Arsene, I. C. Wed . "Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions at sNN=200 GeV". United States. doi:10.1103/PhysRevC.94.014907. https://www.osti.gov/servlets/purl/1340370.
@article{osti_1340370,
title = {Rapidity and centrality dependence of particle production for identified hadrons in Cu + Cu collisions at sNN=200 GeV},
author = {Arsene, I. C.},
abstractNote = {The BRAHMS collaboration has measured transverse momentum spectra of pions, kaons, protons, and antiprotons at rapidities 0 and 3 for Cu+Cu collisions at sNN=200 GeV. As the collisions become more central the collective radial flow increases while the temperature of kinetic freeze-out decreases. The temperature is lower and the radial flow weaker at forward rapidity. Pion and kaon yields with transverse momenta between 1.5 and 2.5 GeV/c are suppressed for central collisions relative to scaled p + p collisions. This suppression, which increases as the collisions become more central, is consistent with jet quenching models and is also present with comparable magnitude at forward rapidity. At such rapidities, initial state effects may also be present and persistence of the meson suppression to high rapidity may reflect a combination of jet quenching and nuclear shadowing. In conclusion, the ratio of protons to mesons increases as the collisions become more central and is largest at forward rapidities.},
doi = {10.1103/PhysRevC.94.014907},
journal = {Physical Review C},
number = 1,
volume = 94,
place = {United States},
year = {2016},
month = {7}
}

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