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2021 Spring KIAS HEP Seminar Series

A near-conformal composite Higgs model

Name: A near-conformal composite Higgs model
Start: 2021-03-11T17:00:00+09:00
End: 2021-03-11T18:30:00+09:00
Location: No location set

by Prof. Maurizio Piai (Swansea University)

Thursday 11 Mar 2021, 17:00 → 18:30 Asia/Seoul

Description

We analyze a composite Higgs model based on the confining SU(3) gauge theory with Nf = 8 Dirac fermions in the fundamental representation. This gauge theory has been studied on the lattice and shown to be well described by a dilaton effective field theory (EFT). Here we modify the EFT by assigning standard-model quantum numbers such that four of the composite pseudo-Nambu-Goldstone boson (pNGB) fields form the standard-model Higgs doublet, by coupling it to the top quark, and by adding to the potential a term that triggers electroweak symmetry breaking. The model contains a pNGB Higgs boson, a set of heavier pNGBs, and an approximate dilaton in the same mass range. We study the phenomenology of the model, and discuss the amount of tuning required to ensure consistency with current direct and indirect bounds on new physics, highlighting the role of the dilaton field.

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A near-conformal composite Higgs model

by Prof. Maurizio Piai (Swansea University)