# XXVII International Workshop on Deep Inelastic Scattering and Related Subjects

Apr 8 – 12, 2019
Turin
Europe/Rome timezone

## SIDIS Pion Beam Spin Asymmetries with CLAS 12 at 10.6 GeV

Apr 9, 2019, 9:38 AM
17m
Rettorato - Aula Principi d'Acaja

### Rettorato - Aula Principi d'Acaja

via Verdi, 8 Turin
Parallel Session Talk WG6: Spin and 3D structure

### Speaker

Dr Stefan Diehl (Justus Liebig University Giessen and University of Connecticut)

### Description

The CLAS12 detector at Jefferson Laboratory (JLab) started data taking with a polarized 10.6 GeV electron beam, interacting with an unpolarized liquid hydrogen target in February 2018. One of the first quantities which could be extracted from the new data is the moment $A_{LU}^{sin(\phi)}$ corresponding to the polarized electron beam spin asymmetry in semi-inclusive deep inelastic scattering. $A_{LU}^{sin(\phi)}$ is a twist-3 quantity which provides information about the quark gluon correlations in the nucleon. The talk will present a simultaneous study of all three pion channels ($\pi^{+}$, $\pi^{0}$and $\pi^{-}$) over a large kinematic range with virtualities Q$^{2}$ ranging from 1 GeV$^{2}$ up to 8 GeV$^{2}$. Preliminary results for the measurement in a large range of $z$, $x_{B}$, $P_{T}$ and $Q^{2}$, including up to now not measured kinematic regions will be presented.
*The work is supported by DOE grant no: DE-FG02-04ER41309.

### Primary author

Dr Stefan Diehl (Justus Liebig University Giessen and University of Connecticut)