Speaker
Mr
Kenta Yabe
(Niigata University)
Description
We study the transverse porlarization of hyperons produced in the high-energy unporlarized proton-proton collision in the framework of the collinear factorization. This phenomenon is one of the twist-3 observables and twist-3 distribution and fragmentation functions contribute. In this work, we focus on the former contribution and derive the LO complete cross-section. For the soft-gluon-pole term, we develope the”Master formula” which simplify the procedure of calculation and show explicitly that only the derivative term contributes. Moreover, we calculate the soft-felmion-pole contribution for the first time and show that it vanishes. These results provide a useful tool to explain the mechanism of the hyperon porlarization.
Primary author
Prof.
Yuji Koike
(Niigata University)
Co-authors
Mr
Kenta Yabe
(Niigata University)
Dr
Shinsuke Yoshida
(Central China Normal University)
