Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-01-20
J.Phys.G38:045001,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 8 eps figures, To appear in Journal of Physics G
Scientific paper
10.1088/0954-3899/38/4/045001
We discuss the role of collisional energy loss on high $p_T$ photon data measured by PHENIX collaboration by calculating photon yield in jet-plasma interaction. The phase space distribution of the participating jet is dynamically evolved by solving Fokker-Planck equation. We treat the strong coupling constant ($\alpha_s$) as function of momentum and temperature while calculating the drag and diffusion coefficients. It is observed that the quenching factor is substantially modified as compared to the case when $\alpha_s$ is taken as constant. It is shown that the data is reasonably well reproduced when contributions from all the relevant sources are taken into account. Predictions at higher beam energies relevant for LHC experiment have been made.
Bhattacharya Lusaka
Roy Pradip
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