Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-08-26
Phys.Rev.D82:114009,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, 6 figures
Scientific paper
10.1103/PhysRevD.82.114009
We study the initial and final state interaction effects in the transverse momentum dependent parton distributions in the small-$x$ saturation region. In particular, we discuss the quark distributions in the semi-inclusive deep inelastic scattering, Drell-Yan lepton pair production and dijet-correlation processes in $pA$ collisions. We calculate the quark distributions in the scalar-QED model and then extend to the color glass condensate formalism in QCD. The quark distributions are found universal between the DIS and Drell-Yan processes. On the other hand, the quark distribution from the $qq'\to qq'$ channel contribution to the dijet-correlation process is not universal. However, we find that it can be related to the quark distribution in DIS process by a convolution with the normalized unintegrated gluon distribution in the color glass condensate formalism in the large $N_c$ limit.
Xiao Bo-Wen
Yuan Fang-Fang
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