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Radiative energy loss and radiative p_T-broadening of high-energy partons in QCD matter

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arxiv 1408.5459 v2 pith:7W6UVNOJ submitted 2014-08-23 hep-ph

Bin Wu This is my paper
classification hep-ph
keywords energylossradiativematteralphadoubleemissiongluon
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We study the connection between radiative energy loss and radiative p_T-broadening of a high-energy quark or gluon passing through QCD matter. The generalized Baier-Dokshitzer-Mueller-Peigne-Schiff-Zakharov (BDMPS-Z) formalism is used to calculate energy loss due to multiple gluon emission. With L the length of the matter and l_0 the size of constituents of the matter we find a double logarithmic correction proportional to ln^2(L/l_0) to parton energy loss due to two-gluon emission. We also show that the radiative energy loss per unit length -dE/dz = alpha_s N_c < p_T^2 >/12 by carrying out a resummation of the double logarithmic terms. Here, the transverse momentum broadening <p_T^2> is obtained by resumming terms proportional to alpha_s ln^2(L/l_0) in Ref. [11]. Our result agrees with that by the renormalization of qhat proposed in Refs. [13,14].

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Cited by 3 Pith papers

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