Di Luzio, Luca and Gröber, Ramona and Spannowsky, Michael (2017) 'Maxi-sizing the trilinear Higgs self-coupling : how large could it be?', The European physical journal C., 77 . p. 788.
In order to answer the question on how much the trilinear Higgs self-coupling could deviate from its Standard Model value in weakly coupled models, we study both theoretical and phenomenological constraints. As a first step, we discuss this question by modifying the Standard Model using effective operators. Considering constraints from vacuum stability and perturbativity, we show that only the latter can be reliably assessed in a model-independent way. We then focus on UV models which receive constraints from Higgs coupling measurements, electroweak precision tests, vacuum stability and perturbativity. We find that the interplay of current measurements with perturbativity already excludes self-coupling modifications above a factor of a few with respect to the Standard Model value.
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|Publisher Web site:||https://doi.org/10.1140/epjc/s10052-017-5361-0|
|Publisher statement:||This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.|
|Date accepted:||01 November 2017|
|Date deposited:||05 December 2017|
|Date of first online publication:||21 November 2017|
|Date first made open access:||No date available|
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