Semi-Inclusive Physics Prospects at EPIC

30 Mar 2023, 15:20
20m
106 (MSU Kellogg center)

106

MSU Kellogg center

Parallel talk WG6: Future Experiments WG6

Speaker

Christopher Dilks

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, the transverse-spin asymmetry $A_{UT}$
accesses the Sivers, transversity, pretzelosity, and Kotzinian-Mulders TMD
distributions, as well as the Collins fragmentation function, while the
double-spin asymmetry $A_{LL}$ probes the sea-quark helicity. Insight from
semi-inclusive dihadrons includes dihadron fragmentation functions, gluon
saturation, and the twist-3 distribution $h_L(x)$. 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 and impact of these measurements at the forthcoming
EPIC experiment at the Electron-Ion Collider.

Submitted on behalf of a Collaboration? Yes

Primary author

Presentation materials