DOI: 10.1140/epjc/s2002-01106-2
production at HERA in the color singlet model
with
kT-factorization
A.V. Lipatov1 and N.P. Zotov2
1 Physical Department, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
2 D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
(Received: 31 October 2002 / Published online: 24 January 2003 )
Abstract
In the framework of the
kT-factorization QCD approach
and the
color
singlet model we consider
inelastic photo- and leptoproduction
processes at HERA. We investigate the dependences of the single
differential
and double differential cross section on various forms of the
unintegrated gluon distribution. The
z and
dependences
of the
spin alignment parameter
are presented also.
Our theoretical predictions agree well with the recent data taken
by the
H1 and ZEUS collaborations at HERA. It is shown that the experimental
study of the polarization
mesons at the low
value
is
an additional test of BFKL gluon dynamics.
© Società Italiana di Fisica, Springer-Verlag 2003