Induced electroweak symmetry breaking and supersymmetric naturalness

Jamison Galloway, Markus Luty, Yuhsin Tsai, and Yue Zhao
Phys. Rev. D 89, 075003 – Published 2 April 2014

Abstract

In this paper we study a new class of supersymmetric models that can explain a 125 GeV Higgs without fine-tuning. These models contain additional “auxiliary Higgs” fields with large tree-level quartic interaction terms (from either D terms or F terms) but no Yukawa couplings. These have electroweak-breaking vacuum expectation values (VEVs), and they contribute to the VEVs of the Minimal Supersymmetric Standard Model Higgs via an induced tadpole in most of the parameter space. The tadpole mechanism has been previously studied in strongly coupled models with large D terms, referred to as “superconformal technicolor.” The perturbative models studied here preserve gauge coupling unification in the simplest possible way, namely that all new fields are in complete SU(5) multiplets. The models are consistent with the observed properties of the 125 GeV Higgs-like boson, as well as precision electroweak constraints, and predict a rich phenomenology of new Higgs states at the weak scale. The tuning is less than 10% in most of the phenomenologically allowed parameter space. If electroweak symmetry is broken by an induced tadpole, the cubic and quartic Higgs self-couplings are significantly smaller than in the standard model.

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  • Received 26 December 2013

DOI:https://doi.org/10.1103/PhysRevD.89.075003

© 2014 American Physical Society

Authors & Affiliations

Jamison Galloway1, Markus Luty2, Yuhsin Tsai2, and Yue Zhao3

  • 1Dipartimento di Fisica, Università di Roma “La Sapienza” and INFN Sezione di Roma, I-00185 Rome, Italy
  • 2Physics Department, University of California Davis, Davis, California 95616, USA
  • 3SLAC, Stanford University, Menlo Park, California 94025, USA

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Vol. 89, Iss. 7 — 1 April 2014

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