Measurement of gamma(1S+2S+3S) production in p plus p and Au plus Au collisions at root sNN=200 GeV

Title
Measurement of gamma(1S+2S+3S) production in p plus p and Au plus Au collisions at root sNN=200 GeV
Authors
김용균
Keywords
UPSILON-PRODUCTION; P(P)OVER-BAR COLLISIONS; ROOT-S=1.8 TEV; J-PSI; SUPPRESSION; QCD; RESONANCES; GAMMA
Issue Date
2015-02
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW C, v. 91, NO 2, Page. 1-16
Abstract
Measurements of bottomonium production in heavy-ion and p + p collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield of the three states, (1S + 2S + 3S), was measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au + Au and p + p collisions at root sNN = 200 GeV. The (1S + 2S + 3S) -˃ e(+)e(-) differential cross section at midrapidity was found to be B(ee)d sigma/dy = 108 +/- 38 (stat) +/- 15 (syst) +/- 11 (luminosity) pb in p + p collisions. The nuclear modification factor in the 30% most central Au + Au collisions indicates a suppression of the total. state yield relative to the extrapolation from p + p collision data. The suppression is consistent with measurements made by STAR at RHIC and at higher energies by the CMS experiment at the Large Hadron Collider.
URI
http://journals.aps.org/prc/abstract/10.1103/PhysRevC.91.024913http://hdl.handle.net/20.500.11754/22121
ISSN
0556-2813; 1089-490X
DOI
http://dx.doi.org/10.1103/PhysRevC.91.024913
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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