Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets

Arina C, Martín-Lozano V, Nardini G (2014)
Journal of High Energy Physics 2014(8): 15.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Arina, Chiara; Martín-Lozano, Víctor; Nardini, GermanoUniBi
Abstract / Bemerkung
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 into Z + gamma 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 + photon channels by 20% at most. These enhancements are however larger than the MSSM ones. In the near future, complementarity of dark matter direct searches and collider experiments will be crucial to probe most of the parameter space where the neutralino is the dark matter candidate.
Erscheinungsjahr
2014
Zeitschriftentitel
Journal of High Energy Physics
Band
2014
Ausgabe
8
Art.-Nr.
15
ISSN
1029-8479
eISSN
1029-8479
Finanzierungs-Informationen
Open-Access-Publikationskosten wurden durch die Universität Bielefeld im Rahmen von SCOAP$^3$ – Sponsoring Consortium for Open Access Publishing in Particle Physics gefördert.
Page URI
https://pub.uni-bielefeld.de/record/2692138

Zitieren

Arina C, Martín-Lozano V, Nardini G. Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets. Journal of High Energy Physics. 2014;2014(8): 15.
Arina, C., Martín-Lozano, V., & Nardini, G. (2014). Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets. Journal of High Energy Physics, 2014(8), 15. doi:10.1007/JHEP08(2014)015
Arina, Chiara, Martín-Lozano, Víctor, and Nardini, Germano. 2014. “Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets”. Journal of High Energy Physics 2014 (8): 15.
Arina, C., Martín-Lozano, V., and Nardini, G. (2014). Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets. Journal of High Energy Physics 2014:15.
Arina, C., Martín-Lozano, V., & Nardini, G., 2014. Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets. Journal of High Energy Physics, 2014(8): 15.
C. Arina, V. Martín-Lozano, and G. Nardini, “Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets”, Journal of High Energy Physics, vol. 2014, 2014, : 15.
Arina, C., Martín-Lozano, V., Nardini, G.: Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets. Journal of High Energy Physics. 2014, : 15 (2014).
Arina, Chiara, Martín-Lozano, Víctor, and Nardini, Germano. “Dark matter versus $h \to \gamma\gamma$ and $h \to \gamma Z$ with supersymmetric triplets”. Journal of High Energy Physics 2014.8 (2014): 15.
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arXiv: 1403.6434

Inspire: 1287075

SCOAP3: 3594

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