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Radiative-Z2-breaking twin Higgs model

Jiang-Hao Yu
Phys. Rev. D 94, 111704(R) – Published 30 December 2016

Abstract

In the twin Higgs model, the Higgs boson mass is protected by a Z2 symmetry. The Z2 symmetry needs to be broken either explicitly or spontaneously to obtain misalignment between electroweak and new physics vacua. We propose a novel Z2 breaking mechanism, in which the Z2 is spontaneously broken by radiative corrections to the Higgs potential. Two twin Higgses with different vacua are needed, and vacuum misalignment is realized by opposite but comparable contributions from gauge and Yukawa interactions to the potential. Because of fully radiative symmetry breaking, the Higgs sector is completely determined by twin Higgs vacuum, Yukawa and gauge couplings. There are eight pseudo-Goldstone bosons: the Higgs boson, inert doublet Higgs, and three twin scalars. We show the 125 GeV Higgs mass and constraints from Higgs coupling measurements could be satisfied.

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  • Received 11 August 2016

DOI:https://doi.org/10.1103/PhysRevD.94.111704

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

Jiang-Hao Yu

  • Amherst Center for Fundamental Interactions, Department of Physics, University of Massachusetts-Amherst, Amherst, Massachusetts 01003, USA

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Issue

Vol. 94, Iss. 11 — 1 December 2016

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