Twist-3 T-odd fragmentation functions G ⊥ andG˜⊥in a spectator model

2016/07/31 by Yongliang Yang, Zhun Lu, Zhun Lü +2 · 16 citations
Economics, Econometrics and Finance · Mathematics · Physics and Astronomy · #Algorithm #Computer science #Credit Risk and Financial Regulations #Geometry #Mathematics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Twist #hep-ph

paper · pdf · open access · doi:10.1016/j.physletb.2016.08.053

published in Physics Letters B 761, 333-339 (Elsevier BV) · 8 pages, 3 figures, match the version published in PLB

openalex created_date 2016/07/22 · openalex publication_date 2016/09/02 · arxiv created 2016/10/06 · arxiv updated 2016/10/07 · openalex updated_date 2026/08/05

Abstract

We present a calculation of the twist-3 T-odd chiral-even fragmentation functions G^⊥ and G^⊥ using a spectator model. We consider the effect gluon exchange to calculate all necessary one-loop diagrams for the quark-quark and quark-gluon-quark correlation functions. We find that the gluon loops corrections generate non-zero contribution to these two fragmentation function. We numerically calculate their half-k_T moments by integrating over the transverse momentum and also verify the equation of motion relation among G^⊥, G^⊥ and the Collins function.

Citations

• Fragmentation of transversely polarized quarks probed in transverse momentum distributions
• Single spin asymmetries in heavy quark and antiquark productions
• Light-cone divergence in twist-3 correlation functions
• Beam-spin asymmetries in the azimuthal distribution of pion electroproduction
• Single-spin production asymmetries from the hard scattering of pointlike constituents
• Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs ine+e−Annihilation at Belle