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arXiv · hep-ph/9907414

Triviality and the Precision Bound on the Higgs Mass

R. Sekhar Chivukula·Nick Evans
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Abstract

The triviality of the scalar sector of the standard one-doublet Higgs model implies that this model is only an effective low-energy theory valid below some cut-off scale Lambda. For a heavy higgs this scale must be relatively low (10 TeV or less). Additional interactions coming from the underlying theory, and suppressed by the scale Lambda, give rise to model-dependent corrections to precisely measured electroweak quantities. Dimension six operators arising from the underlying physics naturally contribute to the S and T parameters, and their effects should be included in a global fit to the precision data that determines any limit on the Higgs mass. Using dimensional analysis, we estimate the expected size of these corrections in a custodially-symmetric strongly-interacting underlying theory. Taking these operators' coefficients to be of natural size gives sufficiently large contributions to the T parameter to reconcile Higgs masses as large as 400-500 GeV with the precision data.

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R. Sekhar Chivukula, Nick Evans. 1999-07-19. Triviality and the Precision Bound on the Higgs Mass. https://doi.org/10.1016/s0370-2693(99)00972-7

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