Speaker
Description
Sartre is an event-generator based on the color dipole model of deep inelastic scattering (DIS). It employs the Good-Walker mechanism to simulate event-by-event fluctuations, which are key to describing the incoherent cross section, where the target breaks up following the interaction. Sartre has been extensively used to describe photon–nucleus interactions at the Electron-Ion Collider (EIC), as well as in ultra-peripheral collisions (UPCs) at the LHC and RHIC. Accurately reproducing recent LHC and RHIC data requires incorporating different length scale fluctuations. We demonstrate that introducing sub-nucleonic fluctuations in the nuclear structure is sufficient to describe most current measurements. However, at larger momentum transfers, where the gluon distribution is probed at finer spatial resolution, the present level of model complexity may not fully capture the observed features.
We also present a novel approach to probe the gluonic structure of the pion through tagged-measurements. Future experiments at the LHC and especially EIC, offer exciting opportunities to investigate the nuclear structure, its fluctuations and correlations.
