Speaker
Description
Measurements in semi-inclusive deep inelastic scattering provide a wide range of insights into nucleon structure and hadronization. Spin asymmetries and cross sections in single-hadron and dihadron production are sensitive to various combinations of transverse momentum-dependent (TMD) distribution and fragmentation functions, depending on the polarizations of the initial electron and target nucleon. For example, at leading twist the asymmetry $A_{UT}$ in dihadrons accesses the Sivers, transversity, pretzelosity, and Kotzinian-Mulders TMD distributions. These TMDs are coupled to dihadron fragmentation functions, which offer insight into correlations of the spin of the fragmenting parton with the angular momentum of the outgoing dihadron. Furthermore, TMD fragmentation functions are accessible via the production of a final state with a known polarization, in particular, lambdas. These functions probe spin-orbit correlations in fragmentation analogously to those in TMD PDFs. This presentation will summarize the possibilities of these measurements at the future Electron-Ion Collider.
