Towards upper Higgs mass bounds derived from a chirally invariant lattice Higgs-Yukawa model

by Philipp Gerhold (Humboldt-University Berlin)

Monday 14 Apr 2008, 14:30 → 15:15 Europe/Paris

Bibliotheque (LPSC-TH)

We consider a chirally invariant lattice Higgs-Yukawa model based on the Neuberger overlap operator. As a first step towards the eventual determination of Higgs mass bounds we present the phase structure of the model analytically in the large N_f-limit in the physically interesting region of the Yukawa coupling constant. We confront the analytically obtained phase diagram with corresponding HMC-simulations and find an excellent agreement at large values of N_f. In the opposite case the large N_f computation still gives a good qualitative description of the phase diagram. We then present preliminary results towards the upper Higgs mass bound at one selected cut-off \Lambda.