Continuous flavor symmetries and the stability of asymmetric dark matter

Bishara, Fady; Zupan, Jure

doi:10.1007/jhep01(2015)089

Cited by 8 publications

(5 citation statements)

References 94 publications

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“…A model which is qualitatively similar to the bino-stop model considered earlier is topflavored dark matter [30,42,[141][142][143][144][145][146][147][148][149]. In this framework DM is the lightest component of a flavor multiplet, and under the assumption of minimal flavor violation [150], there is an accidental Z 3 flavor triality symmetry that is responsible for the DM stability.…”

Section: Other Modelsmentioning

confidence: 85%

WIMPs at the galactic center

Agrawal

Batell

Fox

et al. 2015

J. Cosmol. Astropart. Phys.

127

170

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Simple models of weakly interacting massive particles (WIMPs) predict dark matter annihilations into pairs of electroweak gauge bosons, Higgses or tops, which through their subsequent cascade decays produce a spectrum of gamma rays. Intriguingly, an excess in gamma rays coming from near the Galactic center has been consistently observed in Fermi data. A recent analysis by the Fermi collaboration confirms these earlier results. Taking into account the systematic uncertainties in the modelling of the gamma ray backgrounds, we show for the first time that this excess can be well fit by these final states. In particular, for annihilations to (W W , ZZ, hh, tt), dark matter with mass between threshold and approximately (165, 190, 280, 310) GeV gives an acceptable fit. The fit range for bb is also enlarged to 35 GeV m χ 165 GeV. These are to be compared to previous fits that concluded only much lighter dark matter annihilating into b, τ , and light quark final states could describe the excess. We demonstrate that simple, well-motivated models of WIMP dark matter including a thermal-relic neutralino of the MSSM, Higgs portal models, as well as other simplified models can explain the excess.

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Section: Other Modelsmentioning

confidence: 85%

WIMPs at the galactic center

Agrawal

Batell

Fox

et al. 2015

J. Cosmol. Astropart. Phys.

127

170

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show abstract

“…, 6. The couplings of χ i to the gauge bosons are 13) where U diagonalizes the m χ mass matrix, U † m χ U =m χ , and W diagonalizes the gauge-boson mass matrix. The explicit form of FGB couplings to exotic and SM quarks,…”

Section: Fermionic Flavored Dark Mattermentioning

confidence: 99%

Dark Matter and gauged flavor symmetries

Bishara

Greljo

Kamenik

et al. 2015

J. High Energ. Phys.

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Abstract:We investigate the phenomenology of flavored dark matter (DM). DM stability is guaranteed by an accidental Z 3 symmetry, a subgroup of the standard model (SM) flavor group that is not broken by the SM Yukawa interactions. We consider an explicit realization where the quark part of the SM flavor group is fully gauged. If the dominant interactions between DM and visible sector are through flavor gauge bosons, as we show for Dirac fermion flavored DM, then the DM mass is bounded between roughly 0.5 TeV and 5 TeV if the DM multiplet mass is split only radiatively. In general, however, no such relation exists. We demonstrate this using scalar flavored DM where the main interaction with the SM is through the Higgs portal. For both cases we derive constraints from flavor, cosmology, direct and indirect DM detection, and collider searches.

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“…Note that we assume the DM to be a flavor singlet and that the new flavor structure of the interactions with the visible sector is only due to the modification of the SM Higgs couplings. DM that is in a nontrivial flavor multiplet has been investigated in [18][19][20][21][22][23][24][25][26][27][28][29], while our study is closer in spirit to the work in [30][31][32] where the flavor dependence of the DM signals for flavor-singlet DM has been explored.…”

Section: Introductionmentioning

confidence: 97%

Nonstandard Yukawa couplings and Higgs portal dark matter

Bishara

Brod

Uttarayat

et al. 2016

J. High Energ. Phys.

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Abstract:We study the implications of non-standard Higgs Yukawa couplings to light quarks on Higgs-portal dark matter phenomenology. Saturating the present experimental bounds on up-quark, down-quark, or strange-quark Yukawa couplings, the predicted direct dark matter detection scattering rate can increase by up to four orders of magnitude. The effect on the dark matter annihilation cross-section, on the other hand, is subleading unless the dark matter is very light -a scenario that is already excluded by measurements of the Higgs invisible decay width. We investigate the expected size of corrections in multi-Higgsdoublet models with natural flavor conservation, the type-II two-Higgs-doublet model, the Giudice-Lebedev model of light quark masses, minimal flavor violation new physics models, Randall-Sundrum, and composite Higgs models. We find that an enhancement in the dark matter scattering rate of an order of magnitude is possible. Finally, we point out that a discovery of Higgs-portal dark matter could lead to interesting bounds on the light-quark Yukawa couplings.

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Continuous flavor symmetries and the stability of asymmetric dark matter

Cited by 8 publications

References 94 publications

WIMPs at the galactic center

WIMPs at the galactic center

Dark Matter and gauged flavor symmetries

Nonstandard Yukawa couplings and Higgs portal dark matter

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