DOI 10.1007/s100520000360
diffractive production in
the direct photon process
at HERA
J.-S. Xu1 - H.-A. Peng2,3 - Z.-Y. Yan4 - Z.-M. He4
1 Department of Physics, Peking University, Beijing 100871,
P.R. China
2 China Center of Advance Science and
Technology (World Laboratory), Beijing 100080, P.R. China
3 Department of Physics, Peking University, Beijing 100871,
P.R. China
4 Department of Physics, Hebei Teacher's University,
Shijiazhuang 050016, P.R. China
Received: 13 September 1999
/ Revised version: 31 December 1999
/
Published online: 6 April 2000
- © Springer-Verlag 2000
Abstract
We present a study of the
diffractive
production in direct
photon processes at HERA based on the factorization theorem
for
lepton-induced hard diffractive scattering and the factorization
formalism
of the non-relativistic QCD (NRQCD) for quarkonia production.
Using the diffractive gluon distribution function
extracted from HERA data on diffractive deep inelastic scattering
and
diffractive dijet photon production, we demonstrate that this
process
is measurable at DESY HERA. The experimental study of this process
can give
valuable insight in the diffractive production mechanism and
test the color-octet mechanism for heavy quarkonia
production in a new environment.
Copyright Società Italiana di Fisica, Springer-Verlag 2000
