https://doi.org/10.1140/epja/i2007-10003-9
Regular Article - Hadron Physics
Semi-Inclusive Deep Inelastic Scattering processes from small to large PT
Dipartimento di Fisica Teorica, Università di Torino and INFN, Sezione di Torino, Via P. Giuria 1, I-10125, Torino, Italy
* e-mail: mauro.anselmino@to.infn.it
Received:
9
February
2007
Accepted:
24
February
2007
Published online:
27
March
2007
We consider the azimuthal and PT-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 PT values, P T ≲ 1GeV/c, lowest-order contributions, coupled to unintegrated (transverse-momentum-dependent) quark distribution and fragmentation functions, describe all data. At larger PT values, P T ≳ 1GeV/c, the usual pQCD higher-order collinear contributions dominate. Having explained the full PT range of available data, we give new detailed predictions concerning the azimuthal and PT-dependence of hadrons which could be measured in ongoing or planned experiments by HERMES, COMPASS and JLab Collaborations.
PACS: 13.88.+e Polarization in interactions and scattering – / 13.60.-r Photon and charged-lepton interactions with hadrons – / 13.85.Ni Inclusive production with identified hadrons –
© Società Italiana di Fisica and Springer-Verlag, 2007
