System Size and Beam Energy Dependence of Azimuthal Anisotropy from PHENIX

Conference · Tue Jan 01 00:00:00 EST 2008

OSTI ID:946113

Issah, Michael ^[1]; Cianciolo, Vince ^[2]; Awes, Terry C ^[2]; Efremenko, Yuri V ^[2]; Enokizono, Akitomo ^[3]; Read, Jr, Kenneth F ^[2]; Silvermyr, David O ^[2]; Sorensen, Soren P ^[4]; Stankus, Paul W ^[2]; Young, Glenn R ^[2]

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1. Stony Brook University (SUNY) & Vanderbilt University
2. ORNL
3. Lawrence Livermore National Laboratory (LLNL)
4. University of Tennessee, Knoxville (UTK)

We present azimuthal anisotropy measurements in Au+Au and Cu+Cu collisions at {radical}s{sub NN} = 62.4 and 200 GeV. Comparison between reaction plane and cumulant {upsilon}{sub 2} measurements in Au+Au collisions at {radical}s{sub NN} = 200 GeV show that non-flow contributions, originating mainly from jets, influence the extracted {upsilon}{sub 2} for p{sub T} {approx}> 3.5 GeV/c. Number of constituent quark (NCQ) scaling of {upsilon}{sub 2}, when studied as a function of transverse kinetic energy KE{sub T}, is seen to hold for Au+Au collisions at {radical}s{sub NN} = 62.4 and 200 GeV and for Cu+Cu collisions at {radical}s{sub NN} = 200 GeV for KE{sub T} {approx}< 1 GeV/c. Differential hexadecupole flow {upsilon}{sub 4} seems to exhibit scaling with integral {upsilon}{sub 2} for centrality {le} 40% as has been observed for differential {upsilon}{sub 2}.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 946113
• Resource Relation: Conference: 20th International Conference on Nucleus Nucleus Collisions/Quark Matter 2008, Jaipur, India, 20080204, 20080210
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
ENERGY DEPENDENCE
KINETIC ENERGY
QUARKS