Failure of the collinear expansion in calculation of the induced gluon emission

Abstract

We demonstrate that the collinear expansion fails in the case of gluon emission from a fast quark produced in $eA$ DIS. In this approximation the N=1 rescattering contribution to the gluon spectrum vanishes. We show that the higher-twist approach by Guo, Wang and Zhang [4,5] based on the collinear expansion is wrong. The nonzero gluon spectrum obtained in [4,5] is a consequence of unjustified neglecting some important terms in the collinear expansion.

10 pages, 2 eps figures

References in corpus (1)

• Collinear Photon Emission from the Quark-Gluon Plasma: The Light-Cone Path Integral Formulation

Cited by in corpus (3)

• Jet quenching with running coupling including radiative and collisional energy losses
• Anomalous mass dependence of radiative quark energy loss in a finite-size quark-gluon plasma
• Success of collinear expansion in the calculation of induced gluon emission