2020/08/09 by Xiaohui Liu, Felix Ringer, Werner Vogelsang +1 · 5 citations
Mathematics · Physics and Astronomy · #Algorithm #Asymmetry #Computer science #Deep inelastic scattering #Factorization #Gluon #High-Energy Particle Collisions Research #Inelastic scattering #Logarithm #Mathematics #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Scattering #Spin (aerodynamics) #Transverse plane #hep-ex #hep-ph #nucl-ex
paper · pdf · doi:10.1103/physrevd.102.114012
published in Physical review. D/Physical review. D. 102(11) (American Physical Society) · 45 pages, 18 figures
arxiv created 2020/08/09 · openalex created_date 2020/08/13 · openalex publication_date 2020/12/07 · arxiv updated 2021/01/04 · openalex updated_date 2026/08/05
We study factorization in single transverse spin asymmetries for dijet production in proton-proton collisions, by considering soft gluon radiation at one-loop order. We show that the associated transverse momentum dependent (TMD) factorization is valid at the leading logarithmic level. At next-to-leading-logarithmic (NLL) accuracy, however, we find that soft gluon radiation generates terms in the single transverse spin-dependent cross section that differ from those known for the unpolarized case. As a consequence, these terms cannot be organized in terms of a spin independent soft factor in the factorization formula. We present leading logarithmic predictions for the single transverse spin dijet asymmetry for pp collisions at RHIC, based on quark Sivers functions constrained by semi-inclusive deep inelastic scattering data. We hope that our results will contribute to a better understanding of TMD factorization breaking effects at NLL accuracy and beyond.