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Title: Phenomenology of induced electroweak symmetry breaking

Abstract

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 vectormore » 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.« less

Authors:
 [1];  [2];  [3];  [3];  [3]
  1. Univ. of Oregon, Eugene, OR (United States). Dept. of Physics and Inst. of Theoretical Science
  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
Publication Date:
Research Org.:
Univ. of Oregon, Eugene, OR (United States); Univ. of California, Davis, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1454788
Grant/Contract Number:  
SC0009945; FG02-91ER40674
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 3; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Higgs Physics; Supersymmetric Standard Model; Technicolor and Composite Models

Citation Formats

Chang, Spencer, Galloway, Jamison, Luty, Markus A., Salvioni, Ennio, and Tsai, Yuhsin. Phenomenology of induced electroweak symmetry breaking. United States: N. p., 2015. Web. doi:10.1007/JHEP03(2015)017.
Chang, Spencer, Galloway, Jamison, Luty, Markus A., Salvioni, Ennio, & Tsai, Yuhsin. Phenomenology of induced electroweak symmetry breaking. United States. https://doi.org/10.1007/JHEP03(2015)017
Chang, Spencer, Galloway, Jamison, Luty, Markus A., Salvioni, Ennio, and Tsai, Yuhsin. 2015. "Phenomenology of induced electroweak symmetry breaking". United States. https://doi.org/10.1007/JHEP03(2015)017. https://www.osti.gov/servlets/purl/1454788.
@article{osti_1454788,
title = {Phenomenology of induced electroweak symmetry breaking},
author = {Chang, Spencer and Galloway, Jamison and Luty, Markus A. and Salvioni, Ennio and Tsai, Yuhsin},
abstractNote = {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.},
doi = {10.1007/JHEP03(2015)017},
url = {https://www.osti.gov/biblio/1454788}, journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 3,
volume = 2015,
place = {United States},
year = {Tue Mar 03 00:00:00 EST 2015},
month = {Tue Mar 03 00:00:00 EST 2015}
}

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Cited by: 21 works
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Alternatives to an elementary Higgs
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UV complete composite Higgs models
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Which EFT
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Uncovering Mass Generation Through Higgs Flavor Violation
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Alternatives to an Elementary Higgs
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Dark Mesons at the LHC
text, January 2018