Transverse momentum of partons: from low to high pT
Abstract
Description
Transverse-momentum spectra in hard processes are typically described either in terms of intrinsic transverse momentum of partons, or in terms of perturbative radiation. The relation between these descriptions is discussed for the example of semi-inclusive deep inelastic scattering, with special focus on the angular distribution of the observed hadron. This involves nontrivial theoretical issues, such as the proper definition of transverse-momentum dependent parton distributions, and has practical consequences for the description of pT spectra in phenomenology.
7 pages, 3 figures. Talk given at Light Cone 2008, Mulhouse, France, 7-11 July 2008
7 pages, 3 figures. Talk given at Light Cone 2008, Mulhouse, France, 7-11 July 2008