Speaker
Dr
Wolfgang Schaefer
(Institute of Nuclear Physics PAN)
Description
The amplitude for γp→J/ψp (γp→ψ′p) is calculated in a pQCD kT-factorization approach. The total cross section for this process is calculated for different unintegrated gluon distributions and compared with the HERA data and the data extracted recently by the LHCb collaboration. The amplitude for γp→J/ψp (γp→ψ′p) is used to predict the cross section for exclusive photoproduction of J/ψ (ψ′) meson in proton-proton and nucleus-nucleus collisions. In the pp case, compared to earlier calculations we include both Dirac and Pauli electromagnetic form factors. We also discuss the dependence of nuclear shadowing on the charmonium state.
Primary author
Dr
Wolfgang Schaefer
(Institute of Nuclear Physics PAN)
Co-authors
Dr
Anna Cisek
(Rzeszow University)
Prof.
antoni szczurek
(Institute of Nuclear Physics, Krakow and Rzeszow University, Rzeszow)
