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Inclusive Two-Gluon and Valence Quark-Gluon Production in DIS and pA

Jamal Jalilian-Marian·Yuri V. Kovchegov
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Abstract

We calculate production cross sections of a forward quark-gluon pair and of two gluons at mid-rapidity in Deep Inelastic Scattering and in high energy proton-nucleus collisions. The calculation is performed in the framework of the Color Glass Condensate formalism. We first calculate the cross sections in the quasi-classical approximation, which includes multiple rescatterings in the target. We then proceed to include the effects of non-linear small-x evolution in the production cross sections. It is interesting to note that our result for the two-gluon production cross section appears to be in direct violation of AGK cutting rules, which is the first example of such violation in QCD. The calculated quark-gluon and gluon-gluon production cross sections can be used to construct theoretical predictions for two-particle azimuthal correlations at RHIC and LHC (I^{p(d)A}) as well as for Deep Inelastic Scattering experiments at HERA and eRHIC.

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Jamal Jalilian-Marian, Yuri V. Kovchegov. 2005-03-17. Inclusive Two-Gluon and Valence Quark-Gluon Production in DIS and pA. https://doi.org/10.1103/physrevd.70.114017%2010.1103%2Fphysrevd.71.079901

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