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arXiv · 1102.0388

On p_T-broadening of high energy partons associated with the LPM effect in a finite-volume QCD medium

Bin Wu
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Abstract

We study the contributions from radiation to $p_{\perp}$-broadening of a high energy parton traversing a QCD medium with a finite length $L$. The interaction between the parton and the medium is described by decorrelated static multiple scattering. Amplitudes of medium-induced gluon emission and parton self-energy diagrams are evaluated in the soft gluon limit in the BDMPS formalism. We find both the double-logarithmic correction from incoherent scattering, which is parametrically the same as that in single scattering, and the logarithmic correction from the LPM effect. Therefore, we expect a parametrically large correction from radiation to the medium-induced $p_\perp$-broadening in perturbative QCD.

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Bin Wu. 2011-09-27. On p_T-broadening of high energy partons associated with the LPM effect in a finite-volume QCD medium. https://doi.org/10.1007/jhep10(2011)029

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