Single-Spin Asymmetries for Small-Angle Pion Production in High-Energy Hadron Collisions

TL;DR

This paper presents a simple model to analyze single-spin asymmetries in high-energy hadron collisions, focusing on pion production and comparing results with experimental data, highlighting the role of final state interactions.

Contribution

It introduces a model explaining single-spin asymmetries via final state interactions and relates findings to odderon exchange phenomenology.

Findings

Non-zero asymmetries in peripheral kinematics at high energies

Numerical results align with experimental data

Discussion of odderon exchange relevance

Abstract

Within the framework of a simple model, we study single-spin asymmetries for pion production in hadron-hadron collisions at high-energies with one hadron polarised. The asymmetries are generated via a mechanism of final (initial) state interactions. For peripheral kinematics, when the pion belongs to the fragmentation region of the polarised proton, we find non-zero asymmetries in the high-energy limit. Numerical results and comparision with existing experimental data are presented. We also discuss the relationship with odderon exchange phenomenology.