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arXiv · 1801.05809

Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations

Venkitesh Ayyar·Thomas DeGrand·Daniel C. Hackett·William I. Jay·Ethan T. Neil·Yigal Shamir·Benjamin Svetitsky
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Abstract

We use lattice simulations to compute the baryon spectrum of SU(4) lattice gauge theory coupled to dynamical fermions in the fundamental and two-index antisymmetric (sextet) representations simultaneously. This model is closely related to a composite Higgs model in which the chimera baryon made up of fermions from both representations plays the role of a composite top-quark partner. The dependence of the baryon masses on each underlying fermion mass is found to be generally consistent with a quark-model description and large-Nc scaling. We combine our numerical results with experimental bounds on the scale of the new strong sector to derive a lower bound on the mass of the top partner.

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Venkitesh Ayyar, Thomas DeGrand, Daniel C. Hackett, William I. Jay, Ethan T. Neil, Yigal Shamir, Benjamin Svetitsky. 2018-01-17. Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations. https://doi.org/10.1103/physrevd.97.114505

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