Speaker
Dr
Anna Cisek
(University of Rzeszow)
Description
We present results based on our new paper [1]. The amplitude for $\gamma p \to V p$ is calculated
in a pQCD $k_{T}$-factorization approach. The coresponding total cross section for different
unintegrated gluon distributions is calculated and compared with new HERA data for photon-proton collisions.
We also compare the total cross section for $\gamma p \to V p$ reaction with recent data extracted by of the LHCb collaboration.
The amplitude for $\gamma p \to V p$ is used to predict cross section for exclusive
photoproduction of $J/\Psi$ and $\Psi'$ mesons in proton-proton collisions.
Both Dirac and Pauli electromagnetic form factors are included in the calculation
and results are compared with old results (only Dirac form factor). The effect of Pauli form factor is quantified.
Absorption effects are included and their uncertainties are discussed.
Different differential distributions e.g. in $J/\Psi$ ($\Psi'$)
rapidity and transverse momentum are presented and compared with existing
experimental data for Tevatron and LHC energy.
[1] A.Cisek, W. Sch\"afer and A. Szczurek, a paper in preparation.
Author
Dr
Anna Cisek
(University of Rzeszow)
Co-authors
Prof.
Antoni Szczurek
(Institute of Nuclear Physics PAN Cracow, University of Rzeszow)
Dr
Wolfgang Schafer
(Institute of Nuclear Physics PAN Cracow,)
