Contribution parallel talk
Exclusive photoproduction of $J/\psi$ and $\psi'$ mesons in proton-proton collisions
Speakers
- Anna CISEK
Primary authors
- Anna CISEK (University of Rzeszów)
Co-authors
- Wolfgang SCHAFER (Institute of Nuclear Physics PAS)
- Antoni SZCZUREK (Institute of Nuclear Physics PAS)
Files
Abstract content
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.