Constructing a composite Higgs model with built-in large separation of scales

20 Jun 2019, 16:10
20m
Shimao 3B

Shimao 3B

Parallel Physics Beyond the Standard Model Physics Beyond the Standard Model

Speaker

Oliver Witzel (University of Colorado Boulder)

Description

Experimentally a light 125 GeV Higgs boson has been observed but so far no other heavier resonances. Viable models to describe the Higgs boson as composite particle require hence to exhibit a large separation of scales which e.g. occurs in systems located near a conformal fixed point.

First I present our nonperturbative gradient flow step-scaling calculation of the renormalization group beta function for an SU(3) gauge theory with 10 massless, fundamental flavors. The steps of our calculation are detailed and the quality of our set-up using stout-smeared Möbius domain wall fermions with Symanzik gauge action combined with Zeuthen flow measurements is demonstrated. Taking advantage of our step-scaling results, I will use the same set-up to construct a mass-split composite Higgs model with large scale separation, show first results, and demonstrate some of its features. This work is part of the research program by the LSD collaboration.

Primary authors

Oliver Witzel (University of Colorado Boulder) Anna Hasenfratz (university of colorado boulder) Claudio Rebbi

Presentation Materials