Little twin Higgs model

Abstract

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 Z2 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.

Quantum corrections to the spin-independent cross section of the inert doublet dark matter

“…The Higgs sector in the inert doublet model sometimes appears in a part of beyond the standard models, e.g., left-right Twin Higgs model [9][10][11], a composite Higgs model [12], a radiative seesaw model [13][14][15] and models of neutrino flavor with non-Abelian discrete symmetry [16][17][18][19]. Also, the inert doublet model is analyzed in contexts of strong first order electroweak phase transition [20][21][22][23][24], Coleman-Weinberg mechanism driven by the inert doublet [25], and inflation [26].…”

Constraining dark matter in the LRTH model with latest LHC, XENON100 and LUX data

“…From the Figs. (3)(4)(5)(6)(7)(8)(9) in Ref. [7], we get to know that the combined WMAP and Planck data (Ωh 2 = 0.1126 ± 0.0036) cannot put strong limit on the parameter g hŜŜ because the possible limit itself is sensitive to the variation of new parameters δ 1 and δ 2 .…”

“…The collider phenomenology of the LRTH model has been studied intensively for example in Refs. [3][4][5][6][7][8].…”

Neutrino masses from neutral top partners

“…The reason for this is that an effective baryon number is carried by the GUT gauge bosons; however, this is still conserved, and this alone cannot convert, e.g., qqq → l þqq. The proton decays through the combination of quarks and leptons living in the same multiplet and the fact that quarks and antiquarks live in the same multiplet, i.e., in the 10 of an SU(5) multiplet or a 16 of SO (10). It is this …”

“…This novel approach to naturalness dates back to the twin Higgs model [4], and a number of interesting extensions and generalizations have been proposed in the literature [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Recent studies of the experimental constraints and signatures are presented in Refs.…”