Excited baryons as experimental probes of the quark mass

TL;DR

This paper proposes using excited baryons, especially Delta baryons, as experimental probes to investigate the running of the quark mass in the mid-infrared regime, leveraging accessible high-spin states.

Contribution

It introduces a novel approach to study quark mass behavior through high-spin excited baryons, connecting experimental observations with theoretical predictions.

Findings

Excited baryons can reveal the power-law running of quark mass.

High-spin Delta baryons are accessible at current facilities like ELSA and Jlab.

A clean analysis of these states is feasible for probing quark mass dynamics.

Abstract

We observe that excited hadrons provide an opportunity to probe from experiment the power-law running of the quark mass in the mid infrared, while the condition m(k)<k remains valid. A relatively clean analysis is possible for the maximum spin excitations of the Delta baryons, analogous to the yrast states in nuclei. Such states are accessible at current experimental facilities such as ELSA and Jlab.