Medium-induced gluon radiation in hard forward parton scattering in the saturation formalism

Stéphane Munier, Stéphane Peigné, Elena Petreska

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We derive the medium-induced, coherent gluon radiation spectrum associated with the hard forward scattering of an energetic parton off a nucleus, in the saturation formalism and within the Gaussian approximation for the relevant correlators of Wilson lines. The calculation reproduces the simple expression for the spectrum previously obtained in the opacity expansion formalism, and rigorously specifies its validity range. The connection between the calculations in the opacity expansion and saturation formalisms is made apparent. This study may serve as a first step in order to implement consistently induced coherent energy loss and gluon shadowing in `saturation-based models' of hadron nuclear suppression in proton-nucleus collisions.
Original languageEnglish
Article number014014
JournalPhysical Review D
Volume95
Issue number1
DOIs
Publication statusPublished - 13 Jan 2017

Funding

FundersFunder number
Seventh Framework Programme279579

    Keywords

    • hep-ph

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