Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T

Details Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T

2006-06-28

arxiv.org/abs/hep-ph/0606286v1

Eur.Phys.J.A31:373-381,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 17 figures, uses revtex4

Scientific paper

10.1140/epja/i2007-10003-9

We consider the azimuthal and $P_T$ dependence of hadrons produced in unpolarized Semi-Inclusive Deep Inelastic Scattering (SIDIS) processes, within the factorized QCD parton model. It is shown that at small $P_T$ values, $P_T \lsim 1$ GeV/c, lowest order contributions, coupled to unintegrated (Transverse Momentum Dependent) quark distribution and fragmentation functions, describe all data. At larger $P_T$ values, $P_T \gsim 1$ GeV/c, the usual pQCD higher order collinear contributions dominate. Having explained the full $P_T$ range of available data, we give new detailed predictions concerning the azimuthal and $P_T$ dependence of hadrons which could be measured in ongoing or planned experiments by HERMES, COMPASS and JLab collaborations.

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