Higgs boson mass bounds in the presence of a very heavy fourth quark generation

Abstract

We study the effect of a potential fourth quark generation on the upper and lower Higgs boson mass bounds. This investigation is based on the numerical evaluation of a chirally invariant lattice Higgs-Yukawa model emulating the same Higgs-fermion coupling structure as in the Higgs sector of the electroweak Standard Model. In particular, the considered model obeys a Ginsparg-Wilson version of the underlying $SU(2{)}_L\times U(1{)}_Y$ symmetry, being a global symmetry here due to the neglection of gauge fields in this model. We present our results on the modification of the upper and lower Higgs boson mass bounds induced by the presence of a hypothetical very heavy fourth quark doublet. Finally, we compare these findings to the standard scenario of three fermion generations.

arXiv comment9 pages, 3 figures

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Cited by in corpus (13)

• Sealing the fate of a fourth generation of fermions
• Higgs Mass Bounds from Renormalization Flow for a Higgs-top-bottom model
• Higgs Mass Bounds from Renormalization Flow for a simple Yukawa model
• Higgs production and decay with a fourth Standard-Model-like fermion generation
• Global flow of the Higgs potential in a Yukawa model
• Status of the fourth fermion generation before ICHEP2012: Higgs data and electroweak precision observables
• Overlap valence quarks on a twisted mass sea: a case study for mixed action Lattice QCD
• Higgs-Yukawa model in chirally-invariant lattice field theory
• Constraining a fourth generation of quarks: non-perturbative Higgs boson mass bounds
• A lattice study of a chirally invariant Higgs-Yukawa model including a higher dimensional ${\Phi }^6$-term
• The Higgs boson resonance width from a chiral Higgs-Yukawa model on the lattice
• Rescuing 331 bileptons from the Landau pole
• Elementary excitations of a Higgs-Yukawa system