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- W4301150853 abstract "The Higgs boson discovery at the LHC with a mass of approximately 126 GeV suggests, that the electroweak vacuum of the standard model may be metastable at very high energies. However, any new physics beyond the standard model can change this picture. We want to address this important question within a lattice Higgs-Yukawa model as the limit of the standard model (SM). In this framework we will probe the effect of a higher dimensional operator for which we take a $(phi^{dagger}phi)^3$-term. Such a term could easily originate as a remnant of physics beyond the SM at very large scales. As a first step we investigate the phase diagram of the model including such a $(phi^{dagger}phi)^3$ operator. Exploratory results suggest the existence of regions in parameter space where first order transitions turn to second order ones, indicating the existence of a tri-critical line. We will explore the phase structure and the consequences for the stability of the SM, both analytically by investigating the constraint effective potential in lattice perturbation theory, and by studying the system non-perturbatively using lattice simulations." @default.
- W4301150853 created "2022-10-04" @default.
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- W4301150853 date "2013-10-23" @default.
- W4301150853 modified "2023-10-16" @default.
- W4301150853 title "Stabilizing the electroweak vacuum by higher dimensional operators in a Higgs-Yukawa model" @default.
- W4301150853 doi "https://doi.org/10.48550/arxiv.1310.6260" @default.
- W4301150853 hasPublicationYear "2013" @default.
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