Constraining the Higgs trilinear coupling from an SU(2) quadruplet with bounded-from-below conditions-Reference-Cited by-同舟云学术

Constraining the Higgs trilinear coupling from an SU(2) quadruplet with bounded-from-below conditions

Published:2024-01-30 Issue:1 Volume:2024 Page:
ISSN:1029-8479
Container-title:Journal of High Energy Physics
language:en
Short-container-title:J. High Energ. Phys.

Author:

Kannike K.^ORCID

Abstract

Abstract Integrating out a heavy scalar can cause the Higgs trilinear coupling to deviate from its Standard Model value: a good example is provided by an SU(2) quadruplet. Constraints on the full theory, however, can limit the size of the deviation. We show that the bounded-from-below conditions for the Standard Model extended by an SU(2) quadruplet strongly constrain the ℤ2-breaking Higgs portal and can bound the Higgs trilinear coupling close to its Standard Model value. For TeV-scale quadruplet masses in models with custodial symmetry violation, these constraints can be a few times stronger than constraints from electroweak precision measurements. For the custodial quadruplet, these are the strongest theoretical constraints available.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

Link

https://link.springer.com/content/pdf/10.1007/JHEP01(2024)176.pdf

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