### Dark matter versus h → γγ and h → γ Z with supersymmetric triplets

Chiara Arina (Institut d’Astrophysique de Paris, 98bis boulevard Arago, 75014 Paris, France) ; Víctor Martín-Lozano (Instituto de Física Teórica UAM/CSIC and Departamento de Física Teórica, Universidad Autónoma de Madrid, 28049 Madrid, Spain) ; Germano Nardini (Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany; Deutsches Elektronen Synchrotron, Notkestrasse 85, D-22603 Hamburg, Germany)

The Triplet extension of the MSSM (TMSSM) alleviates the little hierarchy problem and provides a significant enhancement of the loop-induced diphoton rate of the lightest CP-even Higgs h . In this paper we pursue the analysis of the TMSSM Higgs phenomenology by computing for the first time the h → Z γ decay. Interestingly we find that the rates of loop-induced decays are correlated and their signal strengths can rise up to 40%-60% depending on the channel. We furthermore study the dark matter phenomenology of the TMSSM. The lightest neutralino is a good dark matter candidate in two regions. The first one is related to the Higgs and Z resonances and the LSP is mostly Bino. The second one is achieved for a mass larger than 90 GeV and the LSP behaves as the well-tempered neutralino. An advantage of the triplet contribution is that the well-tempered neutralino can be a Bino-Triplino mixture, relieving the problem of achieving M 2 ~ M 1 in unified scenarios. The dark matter constraints strongly affect the Higgs phenomenology, reducing the potential enhancements of the diphoton and of the Z γ channels by 20% at most. In the near future, dark matter direct searches and collider experiments will probe most of the parameter space where the neutralino is the dark matter candidate.

{
"_oai": {
"updated": "2018-05-01T10:45:14Z",
"id": "oai:repo.scoap3.org:3594"
},
"authors": [
{
"raw_name": "Chiara Arina",
"affiliations": [
{
"country": "France",
"value": "Institut d\u2019Astrophysique de Paris, 98bis boulevard Arago, 75014 Paris, France"
}
],
"surname": "Arina",
"given_names": "Chiara",
"full_name": "Arina, Chiara"
},
{
"raw_name": "V\u00edctor Mart\u00edn-Lozano",
"affiliations": [
{
"country": "Spain",
"value": "Instituto de F\u00edsica Te\u00f3rica UAM/CSIC and Departamento de F\u00edsica Te\u00f3rica, Universidad Aut\u00f3noma de Madrid, 28049 Madrid, Spain"
}
],
"surname": "Mart\u00edn-Lozano",
"given_names": "V\u00edctor",
"full_name": "Mart\u00edn-Lozano, V\u00edctor"
},
{
"raw_name": "Germano Nardini",
"affiliations": [
{
"country": "Germany",
"value": "Fakult\u00e4t f\u00fcr Physik, Universit\u00e4t Bielefeld, D-33615 Bielefeld, Germany"
},
{
"country": "Germany",
"value": "Deutsches Elektronen Synchrotron, Notkestrasse 85, D-22603 Hamburg, Germany"
}
],
"surname": "Nardini",
"given_names": "Germano",
"full_name": "Nardini, Germano"
}
],
"titles": [
{
"source": "Springer/SISSA",
"title": "Dark matter versus h \u2192 \u03b3\u03b3 and h \u2192 \u03b3 Z with supersymmetric triplets"
}
],
"dois": [
{
"value": "10.1007/JHEP08(2014)015"
}
],
"publication_info": [
{
"page_start": "015",
"material": "article",
"journal_title": "Journal of High Energy Physics",
"year": 2014
}
],
"\$schema": "http://repo.scoap3.org/schemas/hep.json",
"acquisition_source": {
"date": "2014-08-12T00:00:00",
"source": "Springer/SISSA",
"method": "scoap3",
"submission_number": "6f4b628e4d2711e8b67702163e01809a"
},
"page_nr": [
34
],
{
}
],
{
"statement": "The Author(s)"
}
],
"control_number": "3594",
"record_creation_date": "2014-08-12T00:00:00",
"_files": [
{
"checksum": "md5:ac2aabac82f7b4fec73127ab14e2c7ce",
"filetype": "xml",
"bucket": "5d6e6992-577b-438c-a5b2-112b8c7493a5",
"version_id": "db86d1fa-5303-498c-958d-c660ab8379d9",
"key": "10.1007/JHEP08(2014)015.xml",
"size": 114050
},
{
"checksum": "md5:2c767db35f05353e1a2bef244868ac66",
"filetype": "pdf/a",
"bucket": "5d6e6992-577b-438c-a5b2-112b8c7493a5",
"version_id": "1b720bae-f834-406a-b53d-3942ceafb828",
"key": "10.1007/JHEP08(2014)015_a.pdf",
"size": 2379882
}
],
"arxiv_eprints": [
{
"categories": [
"hep-ph",
"astro-ph.CO"
],
"value": "1403.6434"
}
],
"abstracts": [
{
"source": "Springer/SISSA",
"value": "The Triplet extension of the MSSM (TMSSM) alleviates the little hierarchy problem and provides a significant enhancement of the loop-induced diphoton rate of the lightest CP-even Higgs h . In this paper we pursue the analysis of the TMSSM Higgs phenomenology by computing for the first time the h \u2192 Z \u03b3 decay. Interestingly we find that the rates of loop-induced decays are correlated and their signal strengths can rise up to 40%-60% depending on the channel. We furthermore study the dark matter phenomenology of the TMSSM. The lightest neutralino is a good dark matter candidate in two regions. The first one is related to the Higgs and Z resonances and the LSP is mostly Bino. The second one is achieved for a mass larger than 90 GeV and the LSP behaves as the well-tempered neutralino. An advantage of the triplet contribution is that the well-tempered neutralino can be a Bino-Triplino mixture, relieving the problem of achieving M 2 ~ M 1 in unified scenarios. The dark matter constraints strongly affect the Higgs phenomenology, reducing the potential enhancements of the diphoton and of the Z \u03b3 channels by 20% at most. In the near future, dark matter direct searches and collider experiments will probe most of the parameter space where the neutralino is the dark matter candidate."
}
],
"imprints": [
{
"date": "2014-08-04",
"publisher": "Springer/SISSA"
}
]
}
Published on:
04 August 2014
Publisher:
Springer/SISSA
Published in:
Journal of High Energy Physics (2014)

DOI:
https://doi.org/10.1007/JHEP08(2014)015
arXiv:
1403.6434