DOI 10.1007/s100529800873
Investigations of azimuthal asymmetry
in
semi-inclusive leptoproduction
K.A. Oganessyan - H.R. Avakian - N. Bianchi - P. Di Nezza
LNF-INFN, C.P. 13, Enrico Fermi 40, Frascati, Italy (e-mail: kogan@lnf.infn.it, avakian@lnf.infn.it, bianchi@lnf.infn.it, dinezza@lnf.infn.it)
Received: 24 October 1997 / Revised version: 10 February 1998 / Published online: 26 March 1998
Abstract
We consider the azimuthal asymmetries in semi-inclusive deep
inelastic leptoproduction arising due to both perturbative and nonperturbative
effects at HERMES energies and show that the kT2/Q2 order corrections
to and
are
significant. We also reconsider the results of perturbative effects for
at large momentum transfers [1] using
the more recent sets of scale-dependent distribution and fragmentation
functions, which bring up to
difference in
. In the same approach we calculate the
as well.
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