The flavor of the Composite Twin Higgs

Abstract

The assumption of anarchic quark flavor puts serious stress on composite Higgs models: flavor bounds imply a tuning of a few per-mille (at best) in the Higgs potential. Composite twin Higgs (CTH) models significantly reduce this tension by opening up a new region of parameter space, obtained by raising the coupling among the composites close to the strong coupling limit g * ∼ 4π, thereby raising the scale of composites to around 10 TeV. This does not lead to large tuning in the Higgs potential since the leading quantum corrections are canceled by the twin partners (rather than the composites). We survey the leading flavor bounds on the CTH, which correspond to tree-level ∆F = 2 four-Fermi operators from Kaluza-Klein (KK) Z exchange in the kaon system and 1-loop corrections from KK fermions to the electric dipole moment of the neutron. We provide a parametric estimate for these bounds and also perform a numeric scan of the parameter space using the complete calculation for both quantities. The results confirm our expectation that CTH models accommodate anarchic flavor significantly better than regular composite Higgs (CH) models. Our conclusions apply both to the identical and fraternal twin cases.

Cosmology in Mirror Twin Higgs and neutrino masses

“…Phenomenological and model-building aspects of the framework and its UV completions have also been explored. Flavor constraints on the Holograpic and composite Twin Higgs have recently been presented finding reduced tension as compared to regular composite Higgs models [20]. Various options for the breaking of Z 2 and the way they affect the tuning of the model have also been investigated [21][22][23][24].…”

Supersymmetric D-term Twin Higgs

“…Therefore, these models require some UV completions. Twin Higgs models have been embedded in supersymmetric (SUSY) [4,5,7,8] and composite Higgs [6,[9][10][11][12][13][14][15] models. In the present work we focus on SUSY UV completions.…”

Minimal non-abelian supersymmetric Twin Higgs

“…We give a large mass toQ R,1 by introducing a coupling 21) and identifyQ R,2 with a right-handed top quarkū 3 . The yukawa couplings of the up and charm quarks originates from the couplings with φ u ,…”

“…In the scenario, the Higgs is a pseudo-Nambu-Goldstone boson of a global SU(4) symmetry emerging from Z 2 symmetry exchanging the SM with its mirror (or twin) copy. We refer to [16][17][18][19][20][21][22][23] for composite Twin Higgs models, and [24][25][26][27][28][29][30][31][32][33][34] for cosmological aspects of Twin Higgs scenario.…”