Stopping power of hot QCD plasma

Abstract

The partonic energy loss has been calculated taking both the hard and soft contributions for all the $2\to 2$ processes, revealing the importance of the individual channels. Cancellation of the intermediate separation scale has been exhibited. Subtleties related to the identical final state partons have properly been taken into account. The estimated collisional loss is compared with its radiative counter part. We show that there exists a critical energy ($E_c$) below which the collisional loss is more than its radiative counterpart. In addition, we present closed form formulas for both the collision probabilities and the stopping power ($dE/dx$)

revised version, section added, 9pages with 5 figures

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