Light magnetic dark matter in direct detection searches

Nobile, Eugenio Del; Kouvaris, Chris; Panci, Paolo; Sannino, Francesco; Virkajärvi, Jussi

doi:10.1088/1475-7516/2012/08/010

Cited by 76 publications

(70 citation statements)

References 204 publications

(378 reference statements)

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“…The complex scalar has tree level interactions with the standard model Higgs field (Higgs portal type), whereas the dark matter particle has only loop-induced interactions with the standard model particles. The original motivation for this model was to construct an UV completion of the effective magnetic moment dark matter model [61] able to alleviate, at the time, the tension between the results of different DM direct detection experiments. The model phenomenology, including the dark matter and collider aspects, has been further studied in [43,60].…”

Section: Seχy Model: Sm + Complex Scalar + Fermionsmentioning

confidence: 99%

First order electroweak phase transition from (non)conformal extensions of the standard model

Sannino

Virkajärvi

2015

Phys. Rev. D

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We analyse and compare the finite-temperature electroweak phase transition properties of classically (non)conformal extensions of the Standard Model. In the classically conformal scenarios the breaking of the electroweak symmetry is generated radiatively. The models feature new scalars coupled conformally to the Higgs sector as well as new fermions. We uncover the parameter space leading to a first-order phase transition with(out) the Veltman conditions. We also discuss dark (matter) aspects of some of the models and compare with existing literature when appropriate. We observe that to accommodate both, a first order electroweak phase transition, and a phenomenologically viable dark matter candidate requires to go beyond the simplest extensions of the Standard Model. Furthermore these extensions must all feature new degrees of freedom that are naturally lighter than a TeV and therefore the associated models are testable at the upcoming Large Hadron Collider run two experiments. * sannino@cp3-origins.net ¶ virkajarvi@cp3-origins.net arXiv:1505.05872v2 [hep-ph]

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Section: Seχy Model: Sm + Complex Scalar + Fermionsmentioning

confidence: 99%

First order electroweak phase transition from (non)conformal extensions of the standard model

Sannino

Virkajärvi

2015

Phys. Rev. D

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“…Whereas in the case of the magnetic moment interaction, we follow [28] and use the differential χ-nucleus cross section…”

Section: A Direct Detectionmentioning

confidence: 99%

LUX constraints on magnetic dark matter in a perturbative extension of the standard model with(out) naturality

et al. 2014

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We study phenomenological constraints in a simple SEχy extension of the Standard Model (SM) with a 125 GeV Higgs, a vectorlike heavy electron (E), a complex scalar electron (S) and a standard model singlet Dirac fermion (χ). The interactions among the dark matter candidate χ and the standard model particles occur via loop-induced processes involving the Yukawa interaction SEχy. The model is an explicit perturbative realization of so-called magnetic dark matter. The field content allows for a cancelation of quadratic divergences in the scalar masses at one-loop, a phenomenon which we refer to as perturbative naturality. The basic model is constrained dominantly by direct detection experiments and its parameter space can be nearly entirely covered by up-coming ton-scale direct detection experiments. We conclude this work by discussing different variations of the model.

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“…In the electric dipole case, χχ → ff is p-wave suppressed, and the relic density is too large, unless there are additional annihilation channels. Furthermore, Dirac DM models with such large dipole interactions are excluded by direct detection experiments [39,40].…”

Section: Introductionmentioning

confidence: 99%

Three exceptions for thermal dark matter with enhanced annihilation toγγ

2013

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Recently, there have been hints for dark matter (DM) annihilation in the galactic center to one or more photon lines. In order to achieve the observed photon line flux, DM must have a relatively large effective coupling to photons, typically generated radiatively from large couplings to charged particles. When kinematically accessible, direct annihilation of DM to these charged particles is far too large to accommodate both the DM relic density and constraints from the observed flux of continuum photons from the galactic center, halo and dwarf galaxies. We discuss three exceptions to these obstacles, generating the observed line signal while providing the correct relic density and evading photon continuum constraints. The exceptions are (i) coannihilation, where the DM density is set by interactions with a heavier state that is not populated today, (ii) forbidden channels, where DM annihilates to heavier states that are kinematically blocked today, but open in the early Universe, and (iii) asymmetric DM, where the relic density is set by a primordial asymmetry. We build simple models to realize these scenarios.

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Light magnetic dark matter in direct detection searches

Cited by 76 publications

References 204 publications

First order electroweak phase transition from (non)conformal extensions of the standard model

First order electroweak phase transition from (non)conformal extensions of the standard model

LUX constraints on magnetic dark matter in a perturbative extension of the standard model with(out) naturality

Three exceptions for thermal dark matter with enhanced annihilation toγγ

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