Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-02-21
Nucl.Phys.B744:59-79,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
LateX 26 pages. Final version which appeared in Nucl. Phys. B. Figure labels have been changed
Scientific paper
10.1016/j.nuclphysb.2006.03.009
We study the transverse-momentum distribution of hadrons produced in semi-inclusive deep-inelastic scattering (SIDIS). We consider cross sections for various combinations of polarizations of the initial lepton and nucleon or the produced hadron, for which we perform the resummation of large double-logarithmic perturbative corrections arising at small transverse momentum. We present phenomenological results for the processes $lp\to l\pi X$ with longitudinally polarized leptons and protons. We discuss the impact of the perturbative resummation and of estimated non-perturbative contributions on the corresponding cross sections and their spin asymmetry. Our results should be relevant for ongoing studies in the COMPASS experiment at CERN, and for future experiments at the proposed eRHIC collider at BNL.
Koike Yuji
Nagashima Junji
Vogelsang Werner
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