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

Weeam S. Albaltan, Alexei Prokudin, Marc Schlegel

Research output: Contribution to journalArticle

Abstract

We study the semi-inclusive production of real, high-pT, isolated photons in unpolarized and polarized lepton-proton collisions, ℓp→ℓγX. In particular we analyze the transverse nucleon single-spin asymmetry within the collinear twist-3 formalism in perturbative QCD to leading order (LO) accuracy. We find that this spin asymmetry is generated by twist-3 dynamical quark-gluon-quark (qgq) correlations in the nucleon through the so-called soft-fermion and hard pole contributions. Hence, this process unprecedentedly allows for a point-by-point scan of the support of the dynamical qgq twist-3 matrix elements FFT(x,x) and GFT(x,x) in lepton-nucleon scattering experiments.

Original languageEnglish (US)
Article number135367
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume804
DOIs
StatePublished - May 10 2020

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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