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Maxi-sizing the trilinear Higgs self-coupling: how large could it be?

Di Luzio, Luca; Gröber, Ramona; Spannowsky, Michael

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Luca Di Luzio

Ramona Gröber


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.


Di Luzio, L., Gröber, R., & Spannowsky, M. (2017). Maxi-sizing the trilinear Higgs self-coupling: how large could it be?. The European Physical Journal C, 77, Article 788.

Journal Article Type Article
Acceptance Date Nov 1, 2017
Online Publication Date Nov 21, 2017
Publication Date Nov 21, 2017
Deposit Date Jun 19, 2017
Publicly Available Date Dec 5, 2017
Journal European Physical Journal C: Particles and Fields
Print ISSN 1434-6044
Electronic ISSN 1434-6052
Publisher SpringerOpen
Peer Reviewed Peer Reviewed
Volume 77
Article Number 788


Published Journal Article (2.2 Mb)

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Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, 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.

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