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

被引：2

作者：

Albaltan, Weeam S. ^{[1
,2
]}

Prokudin, Alexei ^{[3
,4
]}

Schlegel, Marc ^{[1
]}

机构：

[1] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

[2] Princess Nourah Bint Abdulrahman Univ PNU, Coll Sci, Dept Phys, Riyadh 11671, Saudi Arabia

[3] Penn State Univ Berks, Div Sci, Reading, PA 19610 USA

[4] Jefferson Lab, Theory Ctr, 12000 Jefferson Ave, Newport News, VA 23606 USA

来源：

PHYSICS LETTERS B | 2020年 / 804卷

基金：

美国国家科学基金会;

关键词：

Electron-Ion Collider; Transverse single-spin asymmetries; Lepton-nucleon scattering; Gamma SIDIS; Twist-3; JLAB-THY-19-3067; HARD-SCATTERING; LEPTOPRODUCTION;

D O I：

10.1016/j.physletb.2020.135367

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the semi-inclusive production of real, high-p(T), isolated photons in unpolarized and polarized lepton-proton collisions, lp -> l gamma X. 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 qgqtwist-3 matrix elements F-FT(x, x') and G(FT)(x, x') in lepton-nucleon scattering experiments. (c) 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

引用

页数：8

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