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
  ], 
  "license": [
    {
      "url": "http://creativecommons.org/licenses/by/4.0/", 
      "license": "CC-BY-4.0"
    }
  ], 
  "copyright": [
    {
      "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
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: