Friday, October 1, 2010, 1:00 pm — Small Seminar Room, Bldg. 510

Two widely proposed $k_t$-dependent gluon distributions in the small-$x$ saturation regime are investigated using two particle back-to-back correlations in high energy scattering processes. The Weizs\"{a}cker-Williams gluon distribution, interpreted as the number density of gluons inside the nucleus, is studied in the quark-antiquark jet correlation in deep inelastic scattering. On the other hand, the unintegrated gluon distribution, defined as the Fourier transform of the color-dipole cross section, is probed in the direct photon-jet correlation in $pA$ collisions. Dijet-correlation in $pA$ collisions depends on both gluon distributions through combination and convolution in the large $N_c$ limit. We calculate these processes in two approaches: the transverse momentum dependent factorization approach and the color-dipole/color glass condensate formalism, and they agree with each other completely.

Hosted by: Kevin Dusling

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