Instantons and Spin-Flavor effects in Hadron Physics

TL;DR

This paper explores how instantons influence hadron spectroscopy and reactions, proposing that instanton-induced interactions explain many observed flavor and spin effects in hadron physics.

Contribution

It introduces a model where instanton effects account for flavor and spin phenomena in hadrons, providing a unified explanation for spectral features and reaction anomalies.

Findings

Instanton effects explain hadron spectral features.

Instanton-induced interactions account for spin and flavor anomalies.

The model aligns with observed high-energy reaction data.

Abstract

We discuss the role of instantons in the spectroscopy of ordinary and exotic hadrons as well as in high energy reactions. We argue that the instanton induced flavor- and spin-dependent quark-quark and quark-gluon interactions can explain many features of the hadron spectrum. The observed anomalous spin and flavor effects in various reactions with hadrons can also be understood within the instanton model for QCD vacuum.