Dirac Triplet Extension of the MSSM

Abstract

In this paper we explore extensions of the Minimal Supersymmetric Standard Model involving two $SU(2{)}_L$ triplet chiral superfields that share a superpotential Dirac mass yet only one of which couples to the Higgs fields. This choice is motivated by recent work using two singlet superfields with the same superpotential requirements. We find that, as in the singlet case, the Higgs mass in the triplet extension can easily be raised to $125\text{GeV}$ without introducing large fine-tuning. For triplets that carry hypercharge, the regions of least fine tuning are characterized by small contributions to the $\mathcal{T}$ parameter, and light stop squarks, $m_{{\tilde{t}}_1}\sim 300-450\text{GeV}$; the latter is a result of the $\tan \beta$ dependence of the triplet contribution to the Higgs mass. Despite such light stop masses, these models are viable provided the stop-electroweakino spectrum is sufficiently compressed.

26 pages, 4 figures

References in corpus (16)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The global electroweak fit at NNLO and prospects for the LHC and ILC
• Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Measurement of the Higgs boson mass from the $H\to \gamma \gamma$ and $H\to Z{Z}^{\ast }\to 4\ell$ channels with the ATLAS detector using 25 fb${}^{-1}$ of $pp$ collision data
• Search for pair-produced third-generation squarks decaying via charm quarks or in compressed supersymmetric scenarios in $pp$ collisions at $\sqrt{s}=8$TeV with the ATLAS detector
• Search for direct top-squark pair production in final states with two leptons in pp collisions at sqrt(s)=8TeV with the ATLAS detector
• Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at sqrt(s) = 7 TeV
• Search for disappearing tracks in proton-proton collisions at sqrt(s) = 8 TeV
• Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for direct top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in sqrt(s) = 7 TeV pp collisions using 4.7 fb-1 of ATLAS data
• Triplet Extended Supersymmetric Standard Model
• Triplet-Singlet Extension of the MSSM with a 125 Gev Higgs and Dark Matter
• Supersymmetric Custodial Higgs Triplets and the Breaking of Universality
• Dark Matter versus h into gamma gamma and h into gamma Z with supersymmetric triplets
• Dark Matter from the Supersymmetric Custodial Triplet Model

Cited by in corpus (1)

• 750 GeV Diphotons from Supersymmetry with Dirac Gauginos