MeV dark matter: model independent bounds

We explore the possibility that dark matter interactions with Standard Model particles are dominated by interactions with neutrinos. We examine whether it is possible to construct such a scenario in a gauge invariant manner. We first study the coupling of dark matter to the full lepton doublet and confirm that this generally leads to the dark matter phenomenology being dominated by interactions with charged leptons. We then explore two different implementations of the neutrino portal in which neutrinos mix with a Standard Model singlet fermion that interacts directly with dark matter through either a scalar or vector mediator. In the latter cases we find that the neutrino interactions can dominate the dark matter phenomenology. Present neutrino detectors can probe dark matter annihilations into neutrinos and already set the strongest constraints on these realisations. Future experiments such as Hyper-Kamiokande, MEMPHYS, DUNE, or DARWIN could allow to probe dark matter-neutrino cross sections down to the value required to obtain the correct thermal relic abundance.

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“…The latter are in agreement with the results of Ref. [80], where, in particular, the dimension 6 operator given in Eq. (3.1) has been analysed.…”

Section: Resultssupporting

confidence: 93%

Neutrino portals to dark matter

et al. 2019

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“…Here, our goal is to explore the complementarity of the collider and non-collider experiments mentioned above for all DM EFT operators and DM spin listed in Table 1 [22][23][24] for DM masses in the GeV-TeV range; for lighter DM masses see for example [25]. For the sake of consistency of our analyses, we obtain the present constraints from the LHC data taking into account the validity of the EFT [26][27][28] using the prescription of Ref.…”

Section: Introductionmentioning

confidence: 99%

Interplay of the LHC and non-LHC dark matter searches in the effective field theory approach

et al. 2019

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We present accurate and up-to-date constraints on the complete set of dimension five and six operators with scalar, fermion and vector Dark Matter (DM). We find limits using LHC mono-jet data, spin independent and spin dependent direct searches, relic density and CMB, and show the interplay between high and low energy data in setting bounds on the parameter space. In order to properly compare data taken at different energies, we take into account the effect of the running and mixing of operators. We also take into account the local density uncertainties affecting direct detection data, and apply EFT validity criteria related to the cut on the invariant mass of DM pair production at the LHC, which turns out to be especially important for the case of vector DM. Finally, we estimate the potential of the future LHC runs to probe DM parameter space.

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“…This is important, because in this case indirect detection searches constitute powerful probes [66]. In light of the stringent bounds on light dark matter [67,68], we will focus on dark matter masses at the TeV scale.…”

Section: Thermal Production and Non-thermal Productionmentioning

confidence: 99%

A two Higgs doublet model for dark matter and neutrino masses

et al. 2019

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Motivated by the interesting features of Two Higgs Doublet Models (2HDM) we present a 2HDM extension where the stability of dark matter, neutrino masses and the absence of flavor changing interactions are explained by promoting baryon and lepton number to gauge symmetries. Neutrino masses are addressed within the usual type I seesaw mechanism. A vector-like fermion acts as dark matter and it interacts with Standard Model particles via the kinetic and mass mixings between the neutral gauge bosons. We compute the relevant observables such as the dark matter relic density and spin-independent scattering cross section to outline the region of parameter space that obeys current and projected limits from collider and direct detection experiments via thermal and non-thermal dark matter production.

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MeV dark matter: model independent bounds

Cited by 42 publications

References 63 publications

Neutrino portals to dark matter

Neutrino portals to dark matter

Interplay of the LHC and non-LHC dark matter searches in the effective field theory approach

A two Higgs doublet model for dark matter and neutrino masses

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