XXVIII International Workshop on Deep Inelastic Scattering and Related Subjects

Investigating saturation effects in ultraperipheral collisions at the LHC with the color dipole model

25 Mar 2020, 12:09

17m

Brooklyn, NY

Contributed Talk Small-x, Diffraction and Vector Mesons Small-x, Diffraction and Vector Mesons

Speaker

Dr Tobias Toll (Indian Institute of Technology Delhi)

Description

We investigate saturation e?ffects in ep scattering as well as in ultraperipheral pA and AA collisions at small x with four variants of the impact parameter dependent color dipole model: with and without gluon saturation and with and without a novel mechanism that suppresses unphysical dipole radii above the confinement scale.
We show that ep scattering at HERA can be very well described by any of
the four variants. When going from ep to eA scattering, saturation effects are expected to increase with increasing A. In lieu of an electron-ion collider (EIC), we confront the different versions of the dipole model with data recorded in ultraperipheral collisions at the LHC in order to estimate the sensitivity of the data to gluon saturation in the target nuclei. We also report on new prediction for the EIC.