Quantitative study of the violation of kt-factorization in hadroproduction of quarks at collider energies

Details Quantitative study of the violation of kt-factorization in hadroproduction of quarks at collider energies Quantitative study of the violation of kt-factorization in hadroproduction of quarks at collider energies

2005-04-06

arxiv.org/abs/hep-ph/0504047v2

Phys.Rev.Lett.95:162002,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 6 figures, final version to appear in PRL

Scientific paper

10.1103/PhysRevLett.95.162002

We demonstrate the violation of kT-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 Qsat, 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 kT-factorization can be significant - especially for lighter quarks. At very small x, where leading twist shadowing is large, we show that violations of kT-factorization are relatively weaker.

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