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

Journal Article · Thu Jul 14 00:00:00 EDT 2022 · SciPost Physics Proceedings

DOI:https://doi.org/10.21468/SciPostPhysProc.8.149· OSTI ID:1876104

Diehl, Stefan ^[1]

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1. University of Giessen, University of Connecticut

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} $F_{LU}^{sin\varphi }/F_{UU}$ extracted from single pion ( \pi^{+} ${\pi }^{+}$ , \pi^{-} ${\pi }^{-}$ , \pi^{0} ${\pi }^0$ ) SIDIS data over a large kinematic range in z $z$ , x_{B} $x_B$ , P_{T} $P_T$ and virtualities Q^{2} $Q^2$ ranging from 1~GeV ^2 ${}^2$ up to 7~GeV ^2 ${}^2$ . F^{sin\phi}_{LU} $F_{LU}^{sin\varphi }$ is a twist-3 quantity that can reveal novel properties of quark-gluon correlations within the nucleon.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-06OR23177
• OSTI ID: 1876104
• Journal Information: SciPost Physics Proceedings, Journal Name: SciPost Physics Proceedings Journal Issue: 8; ISSN 2666-4003
• Publisher: Stichting SciPost
• Country of Publication: Netherlands
• Language: English