The Beauty of Spin

TL;DR

This paper reviews recent advances in theoretical spin physics, covering topics from pion production and heavy quark spin symmetry to nucleon electric dipole moments and experimental highlights from COSY.

Contribution

It synthesizes recent theoretical developments and experimental results in spin physics, emphasizing new insights into hadron interactions and properties.

Findings

Insights into pion production mechanisms

Implications of heavy quark spin symmetry for hadron molecules

Experimental results from COSY on spin phenomena

Abstract

I review recent developments in theoretical spin physics. Topics include pion production in nucleon-nucleon collisions, the implications of heavy quark spin symmetry for heavy hadron molecules, the nucleon electric dipole form factors and ab initio calculations of the width of hadron resonances. A few spin physics high-lights from experiments at the COSY accelerator are also discussed.