18-22 October 2021
Matsue, Shimane Prefecture, Japan
Asia/Tokyo timezone

Transverse polarization of hyperons in SIDIS from twist-3 gluon fragmentation functions

20 Oct 2021, 12:27
Room 601 (Kunibiki Messe)

Room 601

Kunibiki Messe

Parallel Session Presentation Transverse momentum structure (TMD) Transverse Momentum Structure (TMD)


Mr Riku Ikarashi (Niigata University, Graduate School of Science and Technology)


We study the transverse polarization of hyperons produced
in semi-inclusive deep inelastic scattering, $ep \to e\Lambda^{\uparrow}X$,
in the collinear twist-3 factorization. This process receives three types of
twist-3 contributions: (i) twist-3 distribution in the initial proton combined
with the transversity fragmentation function (FF) for the hyperon,
(ii) Twist-3 quark FFs for the hyperon, and (iii) Twist-3 gluon FFs for the hyperon.
In this talk, we present the twist-3 cross section for (iii) in the leading order (LO)
with respect to the QCD coupling constant, which completes the LO cross section
for this process. Since gluons are ample in the nucleons, this contribution
representing multi-gluon correlations in the fragmentation process is
potentially as important as other two contributions. This study is relevant
for the future Electron-Ion Collider experiment.

Primary author

Mr Riku Ikarashi (Niigata University, Graduate School of Science and Technology)


Prof. Yuji Koike (Niigata University) Kenta Yabe (Niigata University) Shinsuke Yoshida (South China Normal University)

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