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- W4300513069 abstract "We consider first the standard model Lagrangian with $mu_h^2$ Higgs potential term set to zero. We point out that this clasically scale invariant theory potentially exhibits radiative electroweak/scale symmetry breaking with very high vacuum expectation value (VEV) for the Higgs field, $< phi > approx 10^{17-18}$ GeV. Furthermore, if such a vacuum were realized then cancellation of vacuum energy automatically implies that this nontrivial vacuum is degenerate with the trivial unbroken vacuum. Such a theory would therefore be critical with the Higgs self-coupling and its beta function nearly vanishing at the symmetry breaking minimum, $lambda (mu=< phi >)approx beta_{lambda} (mu=< phi >)approx 0$. A phenomenologically viable model that predicts this criticality property arises if we consider two copies of the standard model Lagrangian, with exact $Z_2$ symmetry swapping each ordinary particle with a partner. The spontaneously broken vacuum can then arise where one sector gains the high scale VEV, while the other gains the electroweak scale VEV. The low scale VEV is perturbed away from zero due to a Higgs portal coupling, or via the usual small Higgs mass terms $mu_h^2$, which softly break the scale invariance. In either case, the cancellation of vacuum energy requires $M_t = (171.53 pm 0.42)$ GeV, which is close to its measured value of $(173.34 pm 0.76)$ GeV." @default.
- W4300513069 created "2022-10-03" @default.
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- W4300513069 date "2014-09-17" @default.
- W4300513069 modified "2023-10-15" @default.
- W4300513069 title "Criticality in the scale invariant standard model (squared)" @default.
- W4300513069 doi "https://doi.org/10.48550/arxiv.1409.4915" @default.
- W4300513069 hasPublicationYear "2014" @default.
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