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

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.

25 pages, 2 figures

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Cited by in corpus (8)

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• Fully coherent energy loss effects on light hadron production in pA collisions
• Quenching of light hadron spectra in pA collisions from fully coherent energy loss
• Nuclear $p_{\perp }$-broadening of an energetic parton pair
• Quarkonium production at collider energies in Small-$x$ formalism
• Depletion of atmospheric neutrino fluxes from parton energy loss
• Coherent gluon radiation: beyond leading-log accuracy
• Coherent energy loss effects in dihadron azimuthal angular correlations in Deep Inelastic Scattering at small $x$