title: Quantitative study of the violation of kperpendicular factorization in hadroproduction of quarks at collider energies.
abstract: We demonstrate the violation of kperpendicular factorization for quark production in high energy hadronic collisions. This violation is quantified in the color glass condensate framework and studied as a function of the quark mass, the quark transverse momentum, and the saturation scale Q(s), which is a measure of large parton densities. At x values where parton densities are large but leading twist shadowing effects are still small, violations of kperpendicularkfactorization can be significant--especially for lighter quarks. At very small x, where leading twist shadowing is large, we show that violations of kperpendicular factorization are relatively weaker.
authors.affiliation: Institute of Physics, University of Tokyo, Komaba, Japan.
authors.forename: Hirotsugu
authors.initials: H
authors.lastname: Fujii
authors.forename: François
authors.initials: F
authors.lastname: Gelis
authors.forename: Raju
authors.initials: R
authors.lastname: Venugopalan