Repurposing lattice QCD results for composite phenomenology
Thomas DeGrand, Ethan T. Neil
Abstract
A number of proposed extensions of the standard model include new strongly interacting dynamics, in the form of $SU(N)$ gauge fields coupled to various numbers of fermions. Often, these extensions allow $N=3$ as a plausible choice, or even require $N=3$, such as in twin Higgs models, where the new dynamics is a ``copy'' of QCD. However, the fermion masses in such a sector are typically different from (often heavier than) the ones of real-world QCD, relative to the confinement scale. Many of the strong interaction masses and matrix elements for $SU(3)$ at heavy fermion masses have already been computed on the lattice, typically as a by-product of the approach to the physical point of real QCD. We provide a summary of these relevant results for the phenomenological community.