A Little Twin Higgs Model

Details A Little Twin Higgs Model A Little Twin Higgs Model

2007-07-25

arxiv.org/abs/0707.3650v1

Phys.Rev.D76:115018,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, no figures

Scientific paper

10.1103/PhysRevD.76.115018

We present a twin Higgs model based on left-right symmetry with a tree level quartic. This is made possible by extending the symmetry of the model to include two Z_2 parities, each of which is sufficient to protect the Higgs from getting a quadratically divergent mass squared. Although both parities are broken explicitly, the symmetries that protect the Higgs from getting a quadratically divergent mass are broken only collectively. The quadratic divergences of the Higgs mass are thus still protected at one loop. We find that the fine tuning in this model is reduced substantially compared to the original left-right twin Higgs model. This mechanism can also be applied to the mirror twin Higgs model to get a significant reduction of the fine tuning, while keeping the mirror photon massless.

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