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

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Abstract

We study the contributions from radiation to p -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 -broadening in perturbative QCD.

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Correspondence to Bin Wu.

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Wu, B. On p -broadening of high energy partons associated with the LPM effect in a finite-volume QCD medium. J. High Energ. Phys. 2011, 29 (2011). https://doi.org/10.1007/JHEP10(2011)029

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  • DOI: https://doi.org/10.1007/JHEP10(2011)029

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