Speaker
Mr
Christian Hoeppner
(TU Muenchen)
Description
The measurement of unpolarized high-$p_T$ hadron-production cross
sections provides an important benchmark for the applicability of
perturbative QCD (pQCD) calculations, especially at lower center-of-
mass energies, where corrections beyond the next-to-leading order
could become important. These calculations rely on the factorization
of unpolarized and polarized cross sections into non-perturbative
parton distribution functions, which parametrize the structure of the nucleon, hard scattering cross sections, calculable in pQCD, and non-perturbative fragmentation functions. In this contribution we shall present the first measurement of the unpolarized cross section for the quasi-real photo-production of charged hadrons with high transverse momenta from muon-deuteron scattering data at $/sqrt{s}=17.4$\,GeV at COMPASS. The dependence of the cross section on $p_T$ for forward and central rapidities is discussed. The presented cross section results are compared to recent NLO pQCD calculations.
Primary author
Mr
Christian Hoeppner
(TU Muenchen)
