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Title: Parametric estimate of the relative photon yields from the glasma and the quark-gluon plasma in heavy-ion collisions

Journal Article · · Physical Review C
 [1];  [2];  [1];  [3]
  1. Heidelberg Univ. (Germany)
  2. Heidelberg Univ. (Germany). Inst. of Physics
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)

Recent classical-statistical numerical simulations have established the “bottom-up” thermalization scenario of Baier et al. [Phys. Lett. B 502, 51 (2001)] as the correct weak coupling effective theory for thermalization in ultrarelativistic heavy-ion collisions. In this paper, we perform a parametric study of photon production in the various stages of this bottom-up framework to ascertain the relative contribution of the off-equilibrium “glasma” relative to that of a thermalized quark-gluon plasma. Taking into account the constraints imposed by the measured charged hadron multiplicities at Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC), we find that glasma contributions are important especially for large values of the saturation scale at both energies. Finally, these nonequilibrium effects should therefore be taken into account in studies where weak coupling methods are employed to compute photon yields.

Research Organization:
Heidelberg Univ. (Germany); Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE; German Research Foundation (DFG)
Grant/Contract Number:
SC0012704
OSTI ID:
1392299
Alternate ID(s):
OSTI ID: 1356274
Report Number(s):
BNL-114275-2017-JA; R&D Project: KB0301020; KB0301020
Journal Information:
Physical Review C, Vol. 95, Issue 5; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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