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Phenomenology of induced electroweak symmetry breaking

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3];  [3];  [3]
  1. Univ. of Oregon, Eugene, OR (United States). Dept. of Physics and Inst. of Theoretical Science; Department of Physics and Institute of Theoretical Science, University of Oregon Eugene, Oregon 97403
  2. New York Univ. (NYU), NY (United States). Center for Cosmology and Particle Physics
  3. Univ. of California, Davis, CA (United States). Dept. of Physics
We study the phenomenology of models of electroweak symmetry breaking where the Higgs potential is destabilized by a tadpole arising from the coupling to an “auxiliary” Higgs sector. The auxiliary Higgs sector can be either perturbative or strongly coupled, similar to technicolor models. Since electroweak symmetry breaking is driven by a tadpole, the cubic and quartic Higgs couplings can naturally be significantly smaller than their values in the standard model. The theoretical motivation for these models is that they can explain the 125 GeV Higgs mass in supersymmetry without fine-tuning. The auxiliary Higgs sector contains additional Higgs states that cannot decouple from standard model particles, so these models predict a rich phenomenology of Higgs physics beyond the standard model. In this paper we analyze a large number of direct and indirect constraints on these models. We present the current constraints after the 8 TeV run of the LHC, and give projections for the sensitivity of the upcoming 14 TeV run. We find that the strongest constraints come from the direct searches A ° → Zh, A0→$$t\bar{t}$$, with weaker constraints from Higgs coupling fits. For strongly-coupled models, additional constraints come from ρ + → WZ where ρ + is a vector resonance. Our overall conclusion is that a significant parameter space for such models is currently open, allowing values of the Higgs cubic coupling down to 0.4 times the standard model value for weakly coupled models and vanishing cubic coupling for strongly coupled models. In conclusion, the upcoming 14 TeV run of the LHC will stringently test this scenario and we identify several new searches with discovery potential for this class of models.
Research Organization:
Univ. of California, Davis, CA (United States); Univ. of Oregon, Eugene, OR (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-91ER40674; SC0009945
OSTI ID:
1454788
Alternate ID(s):
OSTI ID: 22578630
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 3 Vol. 2015; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Dark mesons at the LHC journal July 2019
Which EFT journal October 2019
Uncovering mass generation through Higgs flavor violation journal February 2016
UV-complete composite Higgs models journal February 2017
UV complete partially composite pseudo-Nambu Goldstone boson Higgs journal February 2017
Alternatives to an elementary Higgs journal October 2016
Alternatives to an Elementary Higgs text January 2016
Uncovering Mass Generation Through Higgs Flavor Violation text January 2015
UV complete composite Higgs models text January 2016
Dark Mesons at the LHC text January 2018

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