arXiv:2206.14965·v1·High Energy Physics — Phenomenology
A New Derivation of the Twist-3 Gluon Fragmentation Contribution to Polarized Hyperon Production
Riku Ikarashi🇯🇵 · Yuji Koike🇯🇵 · Kenta Yabe🇯🇵 · Shinsuke Yoshida🇨🇳
Abstract
A novel method of formulating the twist-3 gluon fragmentation function contribution to hyperon polarization in the proton-proton collision is presented. The method employs a covariant gauge and takes full advantage of the Ward-Takahashi identities before performing the collinear expansion. It provides a robust way of constructing the general cross section formula, and also a clear understanding for the absence of the ghost-like terms in the twist-3 cross section in the leading order with respect to the QCD coupling constant.
Comments: 15 pages, 1 figure