Strong isospin breaking in Sp(4) gauge theory

TL;DR

This paper explores the spectrum and decay constants of an Sp(4) gauge theory with non-degenerate fermions, relevant for dark matter models, using lattice calculations to understand its properties.

Contribution

It provides the first lattice investigation of the light spectrum and decay constants in an Sp(4) gauge theory with non-degenerate fermions, relevant for dark matter research.

Findings

Initial spectrum and decay constants characterized

Insights into isospin breaking effects obtained

Supports viability of Sp(4) as a dark matter candidate

Abstract

A hidden strongly-interacting sector is a possible candidate for dark matter. One scenario consistent with astrophysical constraints is a QCD-like theory with gauge group Sp(4) and two fundamental non-degenerate fermions. We report exploratory investigations of the light spectrum and decay constants for this theory using lattice calculations.