Gluonic contributions to semi-inclusive DIS in the target fragmentation region

• DOI: 10.1007/jhep05(2024)298
• Publication Date: 2024-05-28T22:02:29Z
• Authors: Kai-Bao Chen; Jian-Ping Ma; Xuan-Bo Tong
• Keywords: Physical sciences; High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); Nuclear and particle physics. Atomic energy. Radioactivity; 0103 physical sciences; FOS: Physical sciences; Renormalization Group; QC770-798; Factorization; Deep Inelastic Scattering or Small-x Physics; 01 natural sciences

Abstract

We study one-loop contributions to semi-inclusive deep inelastic scattering in the target fragmentation region for a polarized lepton beam and nucleon target. Complete one-loop results at leading twist are derived, with a particular focus on the gluonic channel. It shows that four structure functions are generated uniquely by the gluon fracture functions starting at one-loop. Additionally, we obtain two structure functions associated with the longitudinal polarization of the virtual photon, and they are contributed by both gluon and quark channels. By combining existing twist-3 results, all eighteen structure functions for the studied process are predicted in terms of fracture functions convoluted with perturbative coefficient functions.