2021/01/31 by S. Diehl, A. Kim, G. Angelini +181
Physics and Astronomy · #Asymmetry #Deep inelastic scattering #Electron #Hadron #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Parton #Photon #Proton #Quantum Chromodynamics and Particle Interactions #Range (aeronautics) #Scattering #Transverse plane #hep-ex
paper · pdf · doi:10.1103/physrevlett.128.062005
arxiv created 2022/01/24 · openalex publication_date 2022/02/11 · openalex created_date 2022/02/13 · arxiv updated 2022/02/23 · openalex updated_date 2026/08/06
High precision measurements of the polarized electron beam-spin asymmetry in semi-inclusive deep inelastic scattering (SIDIS) from the proton have been performed using a 10.6 GeV incident electron beam and the CLAS12 spectrometer at Jefferson Lab. We report here a high precision multidimensional study of single π+ SIDIS data over a large kinematic range in Bjorken x, fractional energy, and transverse momentum of the hadron as well as photon virtualities Q2 ranging from 1-7 GeV2. In particular, the structure function ratio FLUsinϕ/FUU has been determined, where FLUsinϕ is a twist-3 quantity that can reveal novel aspects of emergent hadron mass and quark-gluon correlations within the nucleon. The data's impact on the evolving understanding of the underlying reaction mechanisms and their kinematic variation is explored using theoretical models for the different contributing transverse momentum dependent parton distribution functions.