Partial compositeness and baryon matrix elements on the lattice
High Energy Physics - Phenomenology
2019-05-29 v3 High Energy Physics - Lattice
Abstract
Partial compositeness is a mechanism for the generation of fermion masses which replaces a direct Higgs coupling to the fermions by a linear mixing with heavy composite partners. We present the first calculation of the relevant matrix element in a lattice model which is very close to a candidate theory containing a composite Higgs boson and a partially composite top quark. Specifically, our model is an SU(4) gauge theory coupled to dynamical fermions in the fundamental and two-index antisymmetric (sextet) representations. The matrix element we obtain is small and hence our result disfavors the scenario of obtaining a realistic top mass in this model.
Cite
@article{arxiv.1812.02727,
title = {Partial compositeness and baryon matrix elements on the lattice},
author = {Venkitesh Ayyar and Thomas DeGrand and Daniel C. Hackett and William I. Jay and Ethan T. Neil and Yigal Shamir and Benjamin Svetitsky},
journal= {arXiv preprint arXiv:1812.02727},
year = {2019}
}
Comments
Updated title and version accepted for publication in PRD