Spectroscopy of chimera baryons in a $Sp(4)$ lattice gauge theory

TL;DR

This study performs lattice computations of chimera baryon spectra in an $Sp(4)$ gauge theory, crucial for understanding composite Higgs models and top partners, providing preliminary mass results and testing computational methods.

Contribution

It presents the first lattice spectrum calculations of chimera baryons in an $Sp(4)$ gauge theory, advancing the study of composite Higgs models.

Findings

Preliminary masses for various chimera baryons obtained.

Validation of computational techniques for future dynamical fermion studies.

Identification of the chimera baryon interpreted as the top partner.

Abstract

Chimera baryons are an important element of strongly coupled theories that provide a microscopic origin for UV complete composite Higgs models (CHMs), since they play the role of top partners in top partial compositeness. In a particular interesting realisation of CHMs based upon an underlying $Sp(4)$ gauge theory, such exotic objects are composed of two fermion constituents transforming on the fundamental, and one on the 2-index antisymmetric representations. We perform lattice computations of the chimera baryon spectrum in the quenched approximation. We present preliminary results for the masses of various chimera baryons with different quantum numbers, including the one interpreted as the top partner. We test the technology needed for future calculations with dynamical fermions.