Inclusive production of single hadrons with finite transverse momenta in deepinelastic scattering at nexttoleading order
Abstract
We calculate the cross section for the inclusive production of single hadrons with finite transverse momenta in deepinelastic scattering at nexttoleading order (NLO), i.e., through O(αs2), in the parton model of QCD endowed with nonperturbative parton distribution functions (PDFs) and fragmentation functions (FFs). The NLO correction is found to produce a sizeable enhancement in cross section, of up to one order of magnitude, bringing the theoretical prediction to good agreement with recent measurements for neutral pions and charged hadrons at DESY HERA. This provides a useful test for the universality and the scaling violations of the FFs predicted by the factorization theorem.
 Publication:

Nuclear Physics B
 Pub Date:
 April 2005
 DOI:
 10.1016/j.nuclphysb.2005.01.031
 arXiv:
 arXiv:hepph/0411300
 Bibcode:
 2005NuPhB.711..345K
 Keywords:

 12.38.Bx;
 12.39.St;
 13.87.Fh;
 14.40.Aq;
 Perturbative calculations;
 Factorization;
 Fragmentation into hadrons;
 pi K and eta mesons;
 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment
 EPrint:
 26 pages, 12 figures