Azimuthal angle and rapidity dependence of di-hadron correlations in QCD

Abstract

I discuss novel QCD phenomena recently observed in p+p, p+A and A+A collisions, that result from the non-linear dynamics of small-x gluons. I focus on di-hadron correlation measurements, as opposed to single-hadron observables often too inclusive to distinguish possible new effects from established mechanisms. Specifically, I discuss angular correlations of forward di-hadrons in d+Au collisions and long-range rapidity correlations in high-multiplicity p+p and Au+Au collisions.

Comments: 8 pages, 6 figures, Proceedings of the 4th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (HP2010), Eilat, Israel, October 10-15 2010