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Title: PHENIX Results for J/{psi} Transverse Momentum and Rapidity Dependence in Au+Au and Cu+Cu Collisions

Abstract

The PHENIX experiment at RHIC has measured J/{psi} production in {radical}(s{sub NN})=200 GeV Au+Au and Cu+Cu collisions at forward (1.2 < |y| < 2.2) and mid (|y| < 0.35) rapidities. The most recent results for the rapidity and transverse momentum dependence of J/{psi} production are presented and compared with PHENIX baseline p + p measurements and selected theoretical calculations. We find that the J/{psi} production is significantly more suppressed, as compared to p + p, at forward rapidity than at mid rapidity in central Au+Au collisions.

Authors:
 [1];  [2];  [3];  [2];  [3];  [2];  [2];  [4];  [2];  [2];  [3];  [5]
  1. University of Colorado
  2. ORNL
  3. University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
  4. University of Tennessee, Knoxville (UTK)
  5. The
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931203
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions: Quark Matter 2006, Shanghai, China, 20061114, 20061120
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PARTICLE RAPIDITY; PRODUCTION; QUARK MATTER; TRANSVERSE MOMENTUM; COLLISIONS

Citation Formats

Glenn, A. M., Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, and PHENIX, Collaboration. PHENIX Results for J/{psi} Transverse Momentum and Rapidity Dependence in Au+Au and Cu+Cu Collisions. United States: N. p., 2007. Web.
Glenn, A. M., Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, & PHENIX, Collaboration. PHENIX Results for J/{psi} Transverse Momentum and Rapidity Dependence in Au+Au and Cu+Cu Collisions. United States.
Glenn, A. M., Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, and PHENIX, Collaboration. Mon . "PHENIX Results for J/{psi} Transverse Momentum and Rapidity Dependence in Au+Au and Cu+Cu Collisions". United States. doi:.
@article{osti_931203,
title = {PHENIX Results for J/{psi} Transverse Momentum and Rapidity Dependence in Au+Au and Cu+Cu Collisions},
author = {Glenn, A. M. and Awes, Terry C and Batsouli, Sotiria and Cianciolo, Vince and Efremenko, Yuri and Read Jr, Kenneth F and Silvermyr, David O and Sorensen, Soren P and Stankus, Paul W and Young, Glenn R and Zhang, Chun and PHENIX, Collaboration},
abstractNote = {The PHENIX experiment at RHIC has measured J/{psi} production in {radical}(s{sub NN})=200 GeV Au+Au and Cu+Cu collisions at forward (1.2 < |y| < 2.2) and mid (|y| < 0.35) rapidities. The most recent results for the rapidity and transverse momentum dependence of J/{psi} production are presented and compared with PHENIX baseline p + p measurements and selected theoretical calculations. We find that the J/{psi} production is significantly more suppressed, as compared to p + p, at forward rapidity than at mid rapidity in central Au+Au collisions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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  • We have carried out a wide study of Cold Nuclear Matter (CNM) effects on J/{Psi} = production in dAu, CuCu and AuAu collisions at {radical}s{sub NN} = 200 GeV. We have studied the effects of three different gluon-shadowing parameterizations, using the usual simplified kinematics for which the momentum of the gluon recoiling against the J/{Psi} is neglected as well as an exact kinematics for a 2 {yields} 2 process, namely g + g {yields} J/{psi} + g as expected from LO pQCD. We have shown that the rapidity distribution of the nuclear modification factor R{sub dAu}, and particularly its anti-shadowingmore » peak, is systematically shifted toward larger rapidities in the 2 {yields} 2 kinematics, irrespective of which shadowing parameterization is used. In turn, we have noted differences in the effective final-state nuclear absorption needed to fit the PHENIX dAu data. Taking advantage of our implementation of a 2 {yields} 2 kinematics, we have also computed the transverse momentum dependence of the nuclear modification factor, which cannot be predicted with the usual simplified kinematics. All the corresponding observables have been computed for CuCu and AuAu collisions and compared to the PHENIX and STAR data. Finally, we have extracted the effective nuclear absorption from the recent measurements of RCP in dAu collisions by the PHENIX collaboration.« less
  • J/{psi} production has been measured in Au+Au and Cu+Cu at {radical}(s{sub NN})=200 GeV by the PHENIX experiment at the relativistic heavy ion collider (RHIC) during 2004 and 2005, respectively, at mid-rapidity (|{eta}|{le} 0.35) via J/{psi} {yields} e{sup +}e{sup -} decay and at forward rapidity (1.2 {le}|{eta}|{le} 2.2) via J/{psi} {yields} {mu}{sup +}{mu}{sup -} decay. The nuclear modification factor (RAA) of J/{psi} is presented as a function of the collision centrality for Au+Au collisions (final results) and Cu+Cu collisions (preliminary results) in both rapidity windows. These results are compared to SPS results at lower energy and to various theoretical calculations.
  • The PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC)has measured J/{psi} production for rapidities -2.2<y<2.2 in Au+Au collisions at {radical}(s{sub NN})=200 GeV. The J/{psi} invariant yield and nuclear modification factor R{sub AA} as a function of centrality, transverse momentum, and rapidity are reported. A suppression of J/{psi} relative to binary collision scaling of proton-proton reaction yields is observed. Models which describe the lower energy J/{psi} data at the CERN Super Proton Synchrotron invoking only J/psi destruction based on the local medium density predicta significantly larger suppression at RHIC and more suppression at midrapidity than at forward rapidity. Bothmore » trends are contradicted by our data.« less
  • The PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC)has measured J/{psi} production for rapidities -2.2<y<2.2 in Au+Au collisions at {radical}(s{sub NN})=200 GeV. The J/{psi} invariant yield and nuclear modification factor R{sub AA} as a function of centrality,transverse momentum, and rapidity are reported. A suppression of J/{psi} relative to binary collision scaling of proton-protonreaction yields is observed. Models which describe the lower energy J/{psi} data at the CERN Super Proton Synchrotron invoking only J/{psi} destruction based on the local medium density predicta significantly larger suppression at RHIC and more suppression at midrapiditythan at forward rapidity. Both trends are contradictedmore » by our data.« less