Speaker
Description
We investigate semi-inclusive deep inelastic scattering off a tensor-polarized spin-1 target, focusing on the production of an unpolarized hadron. The differential cross section is parametrized in terms of 23 structure functions, depending on the target spin states and the azimuthal modulations of the detected hadron. Within the transverse-momentum-dependent (TMD) factorization framework, we derive the hadronic tensor using quark–quark and quark–gluon–quark correlators up to twist-3. At tree level, 21 nonvanishing structure functions arise at leading and subleading twist, expressed as convolutions of TMD parton distribution functions and fragmentation functions. Measurements of these structure functions provide direct access to the tensor-polarized structure of spin-1 hadrons and offer insight into their internal dynamics.
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