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Gravitational wave and collider probes of a triplet Higgs sector with a low cutoff

Chala, Mikael; Ramos, Maria; Spannowsky, Michael

Gravitational wave and collider probes of a triplet Higgs sector with a low cutoff Thumbnail


Authors

Mikael Chala

Maria Ramos



Abstract

We study the scalar triplet extension of the standard model with a low cutoff, preventing large corrections to the quadratic masses that would otherwise worsen the hierarchy problem. We explore the reach of LISA to test the parameter space region of the scalar potential (not yet excluded by Higgs to diphoton measurements) in which the electroweak phase transition is strongly first-order and produces sizeable gravitational waves. We also demonstrate that the collider phenomenology of the model is drastically different from its renormalizable counterpart. We study the reach of the LHC in ongoing searches and project bounds for the HL-LHC. Likewise, we develop a dedicated analysis to test the key but still unexplored signature of pair-production of charged scalars decaying to third-generation quarks: pp→tb¯¯(t¯b),bb¯¯ . These results apply straightforwardly to other extensions of the Higgs sector such as the 2HDM/MSSM.

Citation

Chala, M., Ramos, M., & Spannowsky, M. (2019). Gravitational wave and collider probes of a triplet Higgs sector with a low cutoff. The European Physical Journal C, 79(2), Article 156. https://doi.org/10.1140/epjc/s10052-019-6655-1

Journal Article Type Article
Acceptance Date Feb 4, 2019
Online Publication Date Feb 21, 2019
Publication Date Feb 21, 2019
Deposit Date Feb 22, 2019
Publicly Available Date Feb 22, 2019
Journal European Physical Journal C: Particles and Fields
Print ISSN 1434-6044
Electronic ISSN 1434-6052
Publisher SpringerOpen
Peer Reviewed Peer Reviewed
Volume 79
Issue 2
Article Number 156
DOI https://doi.org/10.1140/epjc/s10052-019-6655-1
Public URL https://durham-repository.worktribe.com/output/1302442

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This article is distributed under the terms of the Creative
Commons Attribution 4.0 International License (http://creativecomm
ons.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.
Funded by SCOAP3.






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