QCD effects on direct detection of wino dark matter

Self Cite

Non-supersymmetric SO(10) grand unified theories provide a framework in which the stability of dark matter is explained while gauge coupling unification is realized. In this work, we systematically study this possibility by classifying weakly interacting dark matter candidates in terms of their quantum numbers of SU(2) L ⊗ U(1) Y , B − L, and SU(2) R . We consider both scalar and fermion candidates. We show that the requirement of a sufficiently high unification scale to ensure a proton lifetime compatible with experimental constraints plays a strong role in selecting viable candidates. Among the scalar candidates originating from either a 16 or 144 of SO(10), only SU(2) L singlets with zero hypercharge or doublets with Y = 1/2 satisfy all constraints for SU(4) C ⊗ SU(2) L ⊗ SU(2) R and SU(3) C ⊗ SU(2) L ⊗ SU(2) R ⊗ U(1) B−L intermediate scale gauge groups. Among fermion triplets with zero hypercharge, only a triplet in the 45 with intermediate group SU(4) C ⊗ SU(2) L ⊗ SU(2) R leads to solutions with M GUT > M int and a long proton lifetime. We find three models with weak doublets and Y = 1/2 as dark matter candidates for the SU(4) C ⊗ SU(2) L ⊗ SU(2) R and SU(4) C ⊗ SU(2) L ⊗ U(1) R intermediate scale gauge groups assuming a minimal Higgs content. We also discuss how these models may be tested at accelerators and in dark matter detection experiments.

“…[143]: for instance, σ SI 2 × 10 −47 cm 2 for a 3 TeV real triplet DM, which is well above the neutrino background [144]. For relevant works, see also ref.…”

Section: Jhep10(2015)193mentioning

confidence: 90%

Weakly-interacting massive particles in non-supersymmetric SO(10) grand unified models

Nagata

Olive

Zheng

2015

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“…To test the dark matter in our model in the indirect detection experiments, it is quite important to evaluate its annihilation cross section precisely and compare it with that of the Majorana dark matter. The direct detection rate of the SU(2) L triplet dark matter is rather small; its scattering cross section with a nucleon is computed as σ SI 2 × 10 −47 cm 2 [159]. Still, it is in principle detectable in future experiments, which gives another way to test our model.…”

Section: Jhep02(2016)120mentioning

confidence: 90%

The ATLAS diboson resonance in non-supersymmetric SO(10)

Evans

Olive

Zheng

2016

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SO(10) grand unification accommodates intermediate gauge symmetries with which gauge coupling unification can be realized without supersymmetry. In this paper, we discuss the possibility that a new massive gauge boson associated with an intermediate gauge symmetry explains the excess observed in the diboson resonance search recently reported by the ATLAS experiment. The model we find has two intermediate symmetries,where the latter gauge group is broken at the TeV scale. This model achieves gauge coupling unification with a unification scale sufficiently high to avoid proton decay. In addition, this model provides a good dark matter candidates, whose stability is guaranteed by a Z 2 symmetry present after the spontaneous breaking of the intermediate gauge symmetries. We also discuss prospects for testing these models in the forthcoming LHC experiments and dark matter detection experiments.

“…The computation of even dominant loop corrections to the SI cross-section is quite involved. The results are known only for neutralinos which are pure interaction eigenstates [37][38][39]. For a pure Higgsino LSP the radiatively corrected SI cross-section is of order O(10 −49 ) cm 2 so below the irreducible neutrino background.…”

Section: Jhep03(2016)179mentioning

confidence: 99%

Blind spots for neutralino dark matter in the NMSSM

Badziak

Olechowski

Szczerbiak

2016

Spin-independent cross-section for neutralino dark matter scattering off nuclei is investigated in the NMSSM. Several classes of blind spots for direct detection of singlinoHiggsino dark matter are analytically identified, including such that have no analog in the MSSM. It is shown that mixing of the Higgs doublets with the scalar singlet has a big impact on the position of blind spots in the parameter space. In particular, this mixing allows for more freedom in the sign assignment for the parameters entering the neutralino mass matrix, required for a blind spot to occur, as compared to the MSSM or the NMSSM with decoupled singlet. Moreover, blind spots may occur for any composition of a singlino-Higgsino LSP. Particular attention is paid to cases with the singlet-dominated scalar lighter than the 125 GeV Higgs for which a vanishing tree-level spin-independent scattering cross-section may result from destructive interference between the Higgs and the singlet-dominated scalar exchange. Correlations of the spin-independent scattering cross-section with the Higgs observables are also discussed.