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Spontaneous twin symmetry breaking

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Title
Spontaneous twin symmetry breaking
Author(s)
Tae Hyun Jung
Publication Date
2019-12
Journal
PHYSICAL REVIEW D, v.100, no.11, pp.115012 -
Publisher
AMER PHYSICAL SOC
Abstract
We consider a twin Higgs model where the Z(2) twin symmetry is broken spontaneously, not explicitly. We show that introducing an exact copy of the standard model with a renormalizable Higgs portal potential is enough to realize such a scenario. In this scenario, the SU(4) breaking scale f is determined by the scale where the Higgs self-quartic coupling flips its sign, whose standard model prediction is O(10(10) GeV). For the misalignment of nonzero vacuum expectation values of the twin Higgs fields, it is explicitly shown that parameter tuning of O(m(h)(2)/f(2)) is required, so we conclude that minimal setup does not solve the hierarchy problem. We point out that the tuning can be significantly reduced (f similar to 2.7 TeV) if there are twin vectorlike leptons with a large Yukawa coupling c.Published by the American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6714
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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