2025/05/09 by Yanli Li, Keyang She, Li, Yanli +9
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2505.05963
openalex publication_date 2025/05/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the longitudinal beam single-spin asymmetry ALUsin ϕR of dihadron production in semi-inclusive deep inelastic scattering process with a polarized electron beam scattering off an unpolarized proton target. The asymmetry arises from the convolutions of twist-3 PDF e(x) and twist-2 DiFF H1^\sphericalangle as well as twist-2 PDF f1(x) and twist-3 DiFF \widetildeG\sphericalangle. Using the spectator model calculations for the twist-3 PDF e(x), the DiFFs D1 , H1^\sphericalangle, and \widetildeG\sphericalangle, we estimate the BSA Asin ϕRLU at the kinematical configuration of CLAS and CLAS12. We find good agreement with z- and Mh-dependencies data, though x- and Q2- dependencies show discrepancies. We include DGLAP evolution of e(x) and provide predictions for COMPASS, EIC, and EicC. The negligible contribution from f1(x) ⊗ \widetildeG\sphericalangle supports the Wandzura-Wilczek approximation, while our results highlight the importance of QCD evolution in twist-3 PDF analyses.