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Multidimensional, high precision beam spin asymmetry measurements of semi-inclusive pion production off the proton with CLAS12

by S. Diehl for the CLAS collaboration

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Submission summary

Authors (as registered SciPost users): Stefan Diehl
Submission information
Preprint Link: scipost_202106_00017v1  (pdf)
Date accepted: 2022-03-17
Date submitted: 2021-06-10 11:39
Submitted by: Diehl, Stefan
Submitted to: SciPost Physics Proceedings
Proceedings issue: 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021)
Ontological classification
Academic field: Physics
  • High-Energy Physics - Experiment
Approach: Experimental


High precision measurements of the polarized electron beam-spin asymmetry in SIDIS from the proton have been performed using a 10.6 GeV incident electron beam and the CLAS12 spectrometer at Jefferson Lab. The proceeding reports a multidimensional study of the structure function ratio $F^{sin\phi}_{LU}/F_{UU}$ extracted from single pion ($\pi^{+}$, $\pi^{-}$, $\pi^{0}$) SIDIS data over a large kinematic range in $z$, $x_{B}$, $P_{T}$ and virtualities $Q^{2}$ ranging from 1~GeV$^2$ up to 7~GeV$^2$. $F^{sin\phi}_{LU}$ is a twist-3 quantity that can reveal novel properties of quark-gluon correlations within the nucleon.

Published as SciPost Phys. Proc. 8, 149 (2022)

Reports on this Submission

Anonymous Report 1 on 2022-3-11 (Invited Report)


Well-presented CLAS12 preliminary results on SIDIS at JLab.

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