Work

Next-to-Leading-Order Corrections and Factorization for Transverse Single-Spin Asymmetries

Year: 2025

Type: article

Abstract: We present next-to-leading-order QCD corrections for the cross sections for ℓp^{↑}→hX and ℓp^{↑}→jetX with transversely polarized initial protons. These cross sections are known to be power-suppressed in QCD and probe twist-3 parton correlation functions in the proton. Our calculation exhibits the full complexity of a perturbative QCD analysis beyond leading power, involving in particular various derivatives of the parton correlation functions. We demonstrate that collinear factorization for these single-spin observables holds at one loop. We also present exploratory phenomenological results for the NLO single-spin asymmetry in ep^{↑}→hX and compare to data from the HERMES experiment.

Source: Physical Review Letters

DOI: 10.1103/fhxq-njl2

Authors: Daniel Rein, Marc Schlegel, Patrick Tollkühn, Werner Vogelsang

Institution: University of Tübingen

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750

Funder: Deutsche Forschungsgemeinschaft