6533b854fe1ef96bd12af623
RESEARCH PRODUCT
Centrality and initial formation time dependence of the emission of thermal photons from fluctuating initial conditions at RHIC and LHC
Rupa ChatterjeeHannu HolopainenHannu HolopainenHannu HolopainenThorsten RenkThorsten RenkKari J. EskolaKari J. Eskolasubject
PhysicsNuclear and High Energy PhysicsRange (particle radiation)Large Hadron ColliderPhotonta114010308 nuclear & particles physics01 natural sciences7. Clean energyNuclear physicsThermal radiationYield (chemistry)0103 physical sciencesThermalBoundary value problemAtomic physicsNuclear Experiment010306 general physicsBeam (structure)description
Abstract Event-by-event fluctuating initial conditions (IC) in the ideal hydrodynamic calculation are known to enhance the production of thermal photons significantly compared to a smooth initial state averaged profile in the range p T > 1 GeV / c for 200A GeV Au+Au collisions at RHIC and 2.76A TeV Pb + Pb collisions at LHC. The ‘hotspots’ or the over-dense regions in the fluctuating IC produce more high p T photons compared to the smooth IC due to the strong temperature dependent emission of the thermal radiation. This enhancement is expected to be more pronounced for peripheral collisions, for lower beam energies, and for larger values of plasma formation time. A suitably normalized ratio of central to peripheral yield of thermal photons ( R c p γ ) is a potential probe to study the density fluctuations and their size in the initial conditions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-08-01 | Nuclear Physics A |