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Article
Report number	arXiv:1504.02486 ; CERN-PH-TH-2015-078 ; CERN-PH-TH-2015-078
Title	Dark Matter from the Supersymmetric Custodial Triplet Model
Author(s)	Delgado, Antonio (Notre Dame U. ; CERN) ; Garcia-Pepin, Mateo (Barcelona, IFAE) ; Ostdiek, Bryan (Notre Dame U.) ; Quiros, Mariano (ICREA, Barcelona ; Barcelona, IFAE)
Publication	2015-07-14
Imprint	09 Apr 2015
Number of pages	16
Note	Comments: 26 pages, 8 figures 26 pages, 8 figures; v2 revised comments on classification method and indirect detection section. Results unchanged, matches PRD published version
In:	Phys. Rev. D 92 (2015) 015011
DOI	10.1103/PhysRevD.92.015011
Subject category	Particle Physics - Phenomenology
Abstract	The Supersymmetric Custodial Triplet Model (SCTM) adds to the particle content of the MSSM three $SU(2)_L$ triplet chiral superfields with hypercharge $Y=(0,\pm1)$. At the superpotential level the model respects a global $SU(2)_L \otimes SU(2)_R$ symmetry only broken by the Yukawa interactions. The pattern of vacuum expectation values of the neutral doublet and triplet scalar fields depends on the symmetry pattern of the Higgs soft breaking masses. We study the cases where this symmetry is maintained in the Higgs sector, and when it is broken only by the two doublets attaining different vacuum expectation values. In the former case, the symmetry is spontaneously broken down to the vectorial subgroup $SU(2)_V$ and the $\rho$ parameter is protected by the custodial symmetry. However in both situations the $\rho$ parameter is protected at tree level, allowing for light triplet scalars with large vacuum expectation values. We find that over a large range of parameter space, a light neutralino can supply the correct relic abundance of dark matter either through resonant s-channel triplet scalar funnels or well tempering of the Bino with the triplet fermions. Direct detection experiments have trouble probing these model points because the custodial symmetry suppresses the coupling of the neutralino and the $Z$ and a small Higgsino component of the neutralino suppresses the coupling with the Higgs. Likewise the annihilation cross sections for indirect detection lie below the Fermi-LAT upper bounds for the different channels.
Copyright/License	arXiv nonexclusive-distrib. 1.0 publication: © 2015-2025 The Author(s) (License: CC-BY-3.0) preprint: © 2015-2025 CERN (License: CC-BY-4.0)

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