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

Twist-3 gluon fragmentation contribution to hyperon polarization and its frame independence

20 Oct 2021, 12:09
Room 601 (Kunibiki Messe)

Room 601

Kunibiki Messe

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


Prof. Yuji Koike (Niigata University)


We discuss twist-3 gluon fragmentation function (FF) contribution to the polarized hyperon production in unpolarized pp collisions. The final formula for the LO cross section is presented. We emphasize the importance of the Lorentz invariance relations and the QCD equation-of-motion relations among the twist-3 gluon FFs to guarantee the frame independence of the twist-3 cross section. This study is relevant for the hyperon polarization measurement at RHIC.

Primary authors

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

Presentation Materials