666 research outputs found
Theoretical review of diffractive phenomena
We review QCD based descriptions of diffractive deep inelastic scattering
emphasising the role of models with parton saturation. These models provide
natural explanation of such experimentally observed facts as the constant ratio
of the diffractive and total cross sections as a function of the Bjorken
variable, and Regge factorization of diffractive parton distributions. The
Ingelman-Schlein model and the soft color interaction model are also presented.Comment: plenary presentation at the Baryon04, 25-29 October 2004, Palaiseau,
Franc
Drell-Yan production with the CCFM-K evolution
We discuss the Drell-Yan dilepton production using the transverse momentum
dependent parton distributions evolved with the
Catani-Ciafaloni-Fiorani-Marchesini-Kwieci\'nski (CCFM-K) equations in the
single loop approximation. Such equations are obtained assuming angular
ordering of emitted partons (coherence) for and transverse momentum
ordering for . This evolution scheme also contains the
Collins-Soper-Sterman (CSS) soft gluon resummation. We make a comparison with a
broad class of data on transverse momentum spectra of low mass Drell-Yan
dileptons.Comment: 29 pages, 9 figure
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