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T: Fachverband Teilchenphysik

T 26: Gittereichtheorie II

T 26.8: Vortrag

Dienstag, 16. März 2010, 18:30–18:45, HG XIII

Non perturbative analysis of the Higgs boson from a chiral invariant lattice Higgs-Yukawa model — •Jim Kallarackal^1,2, Philipp Gerhold^1,2, and Karl Jansen² — ¹Humboldt Universitaet zu Berlin, Newstonstr. 15, 12489 Berlin — ²DESY Zeuthen, Platanenallee, 15738 Zeuthen

The focus of our work is the the non perturbative analysis of the Higgs boson on a discretized space time lattice. Our work makes use of the Neuberger overlap operator which satisfies an exact chiral symmetry on the lattice. Former studies on the lattice Higgs model involving fermions were lacking a consistent formulation of the chiral symmetry on the lattice. The systematic treatment of the Higgs-Yukawa model enables us to address phenomenological questions of the standard model Higgs sector such as triviality, mass bounds and decay pa- rameters. Our framework enables us to investigate the unstable nature of the Higgs boson and compute its resonance mass as well as its decay width.