Medium-induced soft gluon radiation in forward dijet production in relativistic proton-nucleus collisions
2015
Considering forward dijet production in the q → qg partonic process, we derive the spectrum of accompanying soft
gluonradiation induced by rescatterings in a nuclear target. The spectrum is obtained to logarithmic accuracy for an arbitrary energy sharing between the final quark and
gluon, and for final transverse momenta as well as momentum imbalance being large as compared to transverse momentum nuclear broadening. In the case of equal energy sharing and for approximately back-to-back quark and
gluontransverse momenta, we reproduce a previous result of Liou and Mueller. Interpreting our result, we conjecture a simple formula for the medium-induced radiation spectrum associated to hard forward 1 → n processes, which we explicitly check in the case of the g → gg process.
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