Towards Partial Compositeness on the Lattice: Baryons with Fermions in Multiple Representations

TL;DR

This paper presents a lattice study of SU(4) gauge theory with fermions in multiple representations, exploring a new class of baryons relevant for composite Higgs models with partial top quark compositeness.

Contribution

It introduces the concept of chimera baryons with fermions in different representations and analyzes their spectrum using lattice simulations.

Findings

Chimera baryons have a spectrum consistent with a non-relativistic quark model.

Results are relevant for models of partial top quark compositeness.

The study advances understanding of baryons in theories with multiple fermion representations.

Abstract

We describe our recent lattice study of SU(4) gauge theory with fermions in the fundamental and sextet representations. In this theory, a new type of baryon consists of quarks in both representations. The spectrum of these "chimera baryons" has a straightforward interpretation in terms of a non-relativistic quark model based on SU(4). Our results are particularly relevant to composite Higgs models in which the top quark is partially composite.