Speaker
Wolfgang Schaefer
(Institute of Nuclear Physics PAN)
Description
High energy heavy ions are the source of a
flux of Weizs\"acker-Williams photons, which can be
utilized to study the photoproduction of vector mesons
on nuclear targets.
We discuss how information on the small-$x$ gluon
distribution in the nucleus can be obtained.
We present our calculations based on a $k_\perp$-factorization
approach which allows us to construct the unintegrated glue
of a nucleus from the free-nucleon one.
Saturation effects are incorporate by an explicit treatment of the
$q \bar q g$-Fock state. If time permits, we also briefly discuss the role of the latter in incoherent diffraction on nuclei.
The presentation will be based on our recent publication
``Exclusive coherent production of heavy vector mesons in nucleus-nucleus collisions at LHC."
A. Cisek, W. Schafer (Cracow, INP), A. Szczurek (Cracow, INP & Rzeszow U.), Phys.Rev. C86 (2012) 014905.
Author
Wolfgang Schaefer
(Institute of Nuclear Physics PAN)
Co-authors
Dr
Anna Cisek
(Institute of Nuclear Physics PAN)
Prof.
Antoni Szczurek
(Institute of Nuclear Physics PAN)
