Speaker
Description
Semi-inclusive Deep Inelastic Scattering measurements have proven to be instrumental in providing access to flavor and transverse momentum distributions of the nucleon due to its ability to tag specific final-state hadrons in coincidence with the scattered electrons. So far, analyses in the SIDIS regime assume no nuclear dependence of the ratio $R=\sigma_L/\sigma_T$ of the longitudinal to transversely polarized virtual-photon cross section, an assumption that has not been systematically tested.
A measured nuclear dependence of $R$ would indicate that the longitudinal and transverse SIDIS responses are modified differently in the nuclear medium, providing new constrains on higher-twist effects and medium-modified hadronization mechanisms.
Experiment E-12-24-001 in Hall C will explore a possible nuclear dependence of $R$ using hydrogen, deuterium, carbon and copper data.