Abstract
We describe exclusive J/ψ,ρ,Φ and γ production at HERA and calculate cross sections and transverse momentum distributions for the incoherent diffractive production of vector mesons J/ψ and γ on heavy nuclei. Within the color dipole approach, we derive the multiple scattering expansion of the incoherent diffractive cross section as an expansion over quasielastic scatterings of the color dipole. We compare our results to the measurement of the ALICE (LHC) collaboration for incoherent J/ψ production
Highlights
A precise knowledge of the partonic structure of the proton and of parton density functions (PDFs) is essential in order to access fully the physics potential of LHC and RHIC
One of the most promising ways to this is the precise investigation of the Higgs boson production, ie. of the Higgs boson decays and its production cross section
Any deviation of the measured Higgs cross section from its predicted value is a sign of the physics beyond the Standard Model (BSM)
Summary
A precise knowledge of the partonic structure of the proton and of parton density functions (PDFs) is essential in order to access fully the physics potential of LHC and RHIC. In addition various resummation techniques were applied All these gave until recently a very good description of HERA inclusive DIS cross sections and LHC Drell-Yan process data the predictions for e.g. Higgs cross section using various fitting schemes are differing by about 10%. This is sizably more than the expected BSM effects could be. The simultaneous analysis of this process together with the analysis of the most precise HERA data and the LHC Drell-Yan processes is very promising because it may allow to understand the saturation effects (or its absence) at larger scales This analysis is possible only through the HERAfitter platform. Saturation is dependent on the size of the scattering objects, its measurement and the absolute value of the cross section could indicate on what objects the scattering takes place
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