Diffractive production of charm in DIS and gluon nuclear shadowing
L. Alvero1 - L.L. Frankfurt2 - M.I. Strikman3,4
1 Department of Physics, Pennsylvania State University, University Park, PA 16802,
USA
2 School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
3 Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
4 Deutsches Elektronen Synchrotron DESY, Hamburg, Germany
Received: 13 November 1998 / Revised version: 25 January 1998 Communicated by A. Schäfer
Abstract
We evaluate nuclear shadowing of the total cross section of charm
particles production in DIS within the framework of
Gribov theory of nuclear shadowing
generalized to account for the QCD evolution. We use
as an input the recent QCD Pomeron parton density analysis of the
HERA diffractive data. Assuming that
the QCD factorization theorem is applicable to the
charm production off nuclei we also calculate shadowing of
the gluon densities in nuclei
and find it sufficiently large for heavy nuclei:
for 
to influence significantly the physics of heavy
ion collisions at LHC.
We evaluate also suppression of minijet and hidden charm production in
the central AA collisions.
We also discuss some
properties of the final states for 
processes
dominated by the scattering off
small x gluons like the high pt jet
and charm production.
PACS
13.60.-r Photon and charged-lepton interactions with hadrons -
24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes
Copyright Springer-Verlag
