Speaker
Description
We present a phenomenological analysis of the Collins azimuthal asymmetries for pion-in-jet production in polarized $pp$ and $ep$ collisions within a TMD approach, adopting a collinear configuration for the initial state. To this aim, we employ the transversity and the Collins fragmentation functions as extracted from semi-inclusive DIS and $e^+ e^-$ annihilation processes.
After comparing our estimates for $pp$ collisions with recent STAR data, we give predictions for lepton-proton collisions for the future Electron-Ion Collider, taking into account the contribution of quasireal photon exchange.
We then show how this study could represent a further step in testing the hypothesis of the universality of the Collins function as well as of the TMD factorization for such processes.