Twist-3 fragmentation contribution to polarized hyperon production in unpolarized hadronic collisions
High Energy Physics - Phenomenology
2017-06-21 v1
Abstract
It has been known for a long time that hyperons produced in hadronic collisions are polarized perpendicular to the production plane of the reaction. This effect cannot be described by using twist-2 collinear parton correlators only. Here we compute the contribution of twist-3 fragmentation functions to the production of transversely polarized hyperons in unpolarized proton-proton collisions in the framework of collinear factorization. By taking into account the relations among the relevant twist-3 fragmentation functions which follow from the QCD equation of motion and the Lorentz invariance property of the correlators, we present the leading-order cross section for this term.
Keywords
Cite
@article{arxiv.1703.09399,
title = {Twist-3 fragmentation contribution to polarized hyperon production in unpolarized hadronic collisions},
author = {Yuji Koike and Andreas Metz and Daniel Pitonyak and Kenta Yabe and Shinsuke Yoshida},
journal= {arXiv preprint arXiv:1703.09399},
year = {2017}
}
Comments
9 pages, 6 figures