title: k(t) factorization for hard processes in nuclei.
abstract: 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 Weizsäcker-Williams gluon distribution, interpreted as the number density of gluon inside 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.
authors.affiliation: Department of Physics, Columbia University, New York, New York, 10027, USA.
authors.forename: Fabio
authors.initials: F
authors.lastname: Dominguez
authors.forename: Bo-Wen
authors.initials: BW
authors.lastname: Xiao
authors.forename: Feng
authors.initials: F
authors.lastname: Yuan