Partially composite Higgs models : phenomenology and RG analysis

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Alanne , T , Franzosi , D B , Frandsen , M T , Kristensen , M L A , Meroni , A & Rosenlyst , M 2018 , ' Partially composite Higgs models : phenomenology and RG analysis ' , Journal of High Energy Physics , vol. 2018 , no. 01 , 051 .

Title: Partially composite Higgs models : phenomenology and RG analysis
Author: Alanne, Tommi; Franzosi, Diogo Buarque; Frandsen, Mads T.; Kristensen, Mette L. A.; Meroni, Aurora; Rosenlyst, Martin
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2018-01-11
Language: eng
Number of pages: 26
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
Abstract: We study the phenomenology of partially composite-Higgs models where electroweak symmetry breaking is dynamically induced, and the Higgs is a mixture of a composite and an elementary state. The models considered have explicit realizations in terms of gauge-Yukawa theories with new strongly interacting fermions coupled to elementary scalars and allow for a very SM-like Higgs state. We study constraints on their parameter spaces from vacuum stability and perturbativity as well as from LHC results and find that requiring vacuum stability up to the compositeness scale already imposes relevant constraints. A small part of parameter space around the classically conformal limit is stable up to the Planck scale. This is however already strongly disfavored by LHC results. In different limits, the models realize both (partially) composite-Higgs and (bosonic) technicolor models and a dynamical extension of the fundamental Goldstone-Higgs model. Therefore, they provide a general framework for exploring the phenomenology of composite dynamics.
Subject: Beyond Standard Model
Global Symmetries
Spontaneous Symmetry Breaking
Technicolor and Composite Models
114 Physical sciences

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