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Low-energy constant $L_{10}$ in a two-representation lattice theory

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arxiv 2010.01920 v2 pith:COZHDKO5 submitted 2020-10-05 hep-lat hep-ph

Maarten Golterman , William I. Jay , Ethan T. Neil , Yigal Shamir , Benjamin Svetitsky This is my paper · ORCID
classification hep-lathep-ph
keywords boundconstantlatticelow-energyparametertheorytwo-representationagrees
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abstract

We calculate the low-energy constant $L_{10}$ in a two-representation SU(4) lattice gauge theory that is close to a composite-Higgs model. From this we obtain the contribution of the new strong sector to the $S$ parameter. This leads to an upper bound on the vacuum misalignment parameter $\xi$ which is similar to current estimates of this bound. Our result agrees with large-$N_c$ scaling expectations, within large systematic uncertainties.

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  1. Progress on the spectroscopy of an Sp(4) gauge theory coupled to matter in multiple representations

    hep-lat 2024-11 conditional novelty 5.0 of 10

    Preliminary lattice spectra of mesons, flavor singlets, and chimera baryons in fully dynamical Sp(4) gauge theory with fermions in two representations are presented.

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