Speaker
Carlo Flore
(INFN Cagliari)
Description
We present an updated phenomenological analysis on transverse Single-Spin Asymmetries (SSAs) for inclusive hadron production in lepton-proton scattering. Adopting a transverse momentum dependent approach, we focus on the role of quasi-real (Weizsacker-Williams) photon exchange, showing its relative contribution to SSAs. Then, using the Sivers and the transversity distributions and the Collins function as extracted from fits to the SSAs for SIDIS and e+e- processes, we show new predictions and comparison with data. The data description shows a general improvement with respect to the previous leading order analysis. Predictions for unpolarized cross sections and SSAs for ongoing and future experiments are also given.
Author
Carlo Flore
(INFN Cagliari)
