The waning of the WIMP? A review of models, searches, and constraints

Arcadi, Giorgio; Dutra, Maíra; Ghosh, Pradipta; Lindner, M.; Mambrini, Yann; Pierre, Mathias; Profumo, Stefano; Queiroz, Farinaldo S.

doi:10.1140/epjc/s10052-018-5662-y

Cited by 783 publications

(805 citation statements)

References 350 publications

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“…Furthermore, one finds in the 4-D case that an additional problem arises if M DM > M DP . If this occurs the DM can annihilate into pairs of DPs which is found to be an s-wave process for both fermionic and bosonic DM in the initial state [1] and is thus constrained by the CMB. In the 5-D case, this tells us that the lightest mode in the DM KK tower (i.e., the actual DM) must be lighter than the corresponding lightest KK state in the DP mediator tower which can be a significant model-building constraint.…”

Section: Cosmology: Planck and Cmb Constraintsmentioning

confidence: 99%

Kinetic mixing, dark photons and an extra dimension. Part I

Rizzo

2018

J. High Energ. Phys.

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Extra dimensions (ED) can provide a useful tool for model-building. In this paper we introduce a single, flat ED extension of the kinetic-mixing/dark photon (DP) portal for dark matter (DM) interactions with the Standard Model (SM) assuming a compactification 'radius' of order R −1 ∼ 10−1000 MeV and examine the resulting modifications to and augmentation of the usual DP phenomenology. In the present scenario, both the DP and DM experience the full 5-D while the SM fields are constrained to lie on a 4-D brane at the boundary of the ED. Such a setup can naturally yield the observed value of the DM relic density and explain the required rough degeneracy of the DM and DP masses needed to obtain it. Gauge symmetry breaking can occur via boundary conditions without the introduction of an additional singlet Higgs scalar thus avoiding all constraints associated with the coupling of such a field to the usual SM Higgs field in 5-D. The self-consistency in the removal of the kinetic mixing terms is found to lead to a brane localized kinetic term for the 5-D gauge field on the SM brane. Multiple variations of this scenario are found to be possible which are consistent with current experimental constraints but which predict very different phenomenologies. In this paper, we discuss the case of a complex scalar 5-D DM field, consistent with constraints arising from the CMB, which may or may not obtain a vacuum expectation value (vev). This approach can lead to interesting and distinctive signatures while being constrained by a wide array of existing measurements but with the details being dependent upon the model specifics.

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Section: Cosmology: Planck and Cmb Constraintsmentioning

confidence: 99%

Kinetic mixing, dark photons and an extra dimension. Part I

Rizzo

2018

J. High Energ. Phys.

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“…The upper bounds on the cross section off the nucleon is obtained by LUX [102] and XENON1T [103]. In the cases of onecomponent DM system of a real or complex scalar boson, those experimental results give the strong constraint on the masses of those DM particles; the allowed DM mass region is ≃m h /2 and > ∼ 1 TeV [104][105][106]. In the model A with the multicomponent DM system, the constrains on the cross sections off the nucleon for χ and φ R are also relatively severe.…”

Section: Multicomponent Dark Matter Systemmentioning

confidence: 99%

Multicomponent Dark Matter in Radiative Seesaw Models

2017

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We discuss radiative seesaw models, in which an exact Z 2 × Z ′ 2 symmetry is imposed. Due to the exact Z 2 × Z ′ 2 symmetry, neutrino masses are generated at a two-loop level and at least two extra stable electrically neutral particles are predicted. We consider two models: one has a multi-component dark matter system and the other one has a dark radiation in addition to a dark matter. In the multi-component dark matter system, non-standard dark matter annihilation processes exist. We find that they play important roles in determining the relic abundance and also responsible for the monochromatic neutrino lines resulting from the dark matter annihilation process. In the model with the dark radiation, the structure of the Yukawa coupling is considerably constrained and gives an interesting relationship among cosmology, lepton flavor violating decay of the charged leptons and the decay of the inert Higgs bosons.

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“…Weakly Interacting Massive Particle (WIMP) [49] is a promising dark matter candidate, since the observed relic density can be naturally derived for a WIMP mass around the electroweak scale. In the U (1) R model, the lightest righthanded Majorana neutrino can be cold dark matter candidate, stabilized by the Z 2 symmetry.…”

Section: Dark Mattermentioning

confidence: 99%

Phenomenology of the gauge symmetry for right-handed fermions

Chao¹

2018

Eur. Phys. J. C

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In this paper we investigate the phenomenology of the U(1) gauge symmetry for right-handed fermions, where three right-handed neutrinos are introduced for anomalies cancellations. Constraints on the new gauge boson Z R from Z − Z mixing as well as the upper bound of Z production cross section in di-lepton channel at the LHC are presented. We further study the neutrino mass and the phenomenology of Z R -portal dark matter in this model. The lightest right-handed neutrino can be the cold dark matter candidate stabilized by a Z 2 flavor symmetry. Our study shows that active neutrino masses can be generated via the modified type-II seesaw mechanism; right-handed neutrino is available dark matter candidate for its mass being very heavy, or for its mass at near the resonant regime of the SM Higgs and(or) the new bosons; constraint from the dilepton search at the LHC is stronger than that from the Z −Z mixing only for g R < 0.121, where g R is the new gauge coupling.

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The waning of the WIMP? A review of models, searches, and constraints

Cited by 783 publications

References 350 publications

Kinetic mixing, dark photons and an extra dimension. Part I

Kinetic mixing, dark photons and an extra dimension. Part I

Multicomponent Dark Matter in Radiative Seesaw Models

Phenomenology of the gauge symmetry for right-handed fermions

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