XXVIII International Workshop on Deep Inelastic Scattering and Related Subjects

The transverse nucleon single-spin asymmetry for the semi-inclusive production of photons in lepton-nucleon scattering

25 Mar 2020, 17:20

20m

Brooklyn, NY

Contributed Talk Spin Physics Spin Physics

Speaker

Ms Weeam Albaltan (New Mexico State University, Princess Nourah bint Abdulrahman University)

Description

We study the semi-inclusive production of hard, isolated photons in unpolarized and polarized lepton-proton collisions, i.e., $\ell p\to \ell \gamma X$. We analyze the transverse nucleon single-spin asymmetry within the collinear twist-3 formalism in perturbative QCD to leading order accuracy (LO). We find that this spin asymmetry is generated by twist-3 dynamical quark-gluon-quark ($qgq$) correlations in the nucleon through so-called soft-fermion pole and hard pole contributions. In particular, the latter are of interest as they -in principle- allow for a point-by-point scan of the support of the dynamical $qgq$ twist-3 matrix elements $F_{FT}(x,x^{\prime })$ and $G_{FT}(x,x^{\prime })$ in lepton-nucleon scattering experiments.