Title

Multidimensional, High Precision Measurements of Beam Single Spin Asymmetries in Semi-inclusive π+ Electroproduction off Protons in the Valence Region

DOI

10.1103/PhysRevLett.128.062005

Authors

S. Diehl, University of Connecticut
A. Kim, University of Connecticut
G. Angelini, The George Washington University
K. Joo, University of Connecticut
S. Adhikari, Florida International University
M. Amaryan, Old Dominion University
M. Arratia, University of California, Riverside
H. Atac, Temple University
H. Avakian, Thomas Jefferson National Accelerator Facility
C. Ayerbe Gayoso, William & Mary
N. A. Baltzell, Thomas Jefferson National Accelerator Facility
L. Barion, Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
S. Bastami, University of Connecticut
M. Battaglieri, Istituto Nazionale di Fisica Nucleare, Sezione di Genova
I. Bedlinskiy, National Research Centre "Kurchatov Institute"
F. Benmokhtar, Duquesne University
A. Bianconi, Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
A. S. Biselli, Fairfield University
M. Bondi, Istituto Nazionale di Fisica Nucleare, Sezione di Genova
F. Bossù, Universite Paris-Saclay
S. Boiarinov, Thomas Jefferson National Accelerator Facility
K. T. Brinkmann, Justus-Liebig-Universität Gießen
W. J. Briscoe, The George Washington University
W. Brooks, Universidad Técnica Federico Santa María
D. Bulumulla, Old Dominion University
V. D. Burkert, Thomas Jefferson National Accelerator Facility
D. S. Carman, Thomas Jefferson National Accelerator Facility
J. C. Carvajal, Florida International University
A. Celentano, Istituto Nazionale di Fisica Nucleare, Sezione di Genova
P. Chatagnon, Universite Paris-Saclay
T. Chetry, Mississippi State University

Document Type

Journal Article

Publication Date

2-11-2022

Publication Title

Physical Review Letters

Volume

128

Issue

6

ISSN

319007

Abstract

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.

Open Access

Hybrid_Gold

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