Light mass window of lepton portal dark matter

Abstract

We explore a novel possibility that dark matter has a light mass below 1GeV in a lepton portal dark matter model. There are Yukawa couplings involving dark matter, left-handed leptons and an extra scalar doublet in the model. In the light mass region, dark matter is thermally produced via its annihilation into neutrinos. In order to obtain the correct relic abundance and avoid collider bounds, a neutral scalar is required to be light while charged scalars need to be heavier than the electroweak scale. Such a mass spectrum is realized by adjusting quartic couplings in the scalar potential or introducing an extra singlet scalar. It turns out that the mass region of 10MeV-10GeV is almost free from experimental and observational constraints. We also point out that searches for extra neutrino flux from galactic dark matter annihilations with neutrino telescopes are the best way to test our model.

26 pages, 10 figures; v4: version published in JHEP; v5: corrected an error in the Higgs decay width into 2gamma and figure 5 accordingly, main conclusion unchanged

References in corpus (16)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• micrOMEGAs4.1: two dark matter candidates
• SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD
• Neutrino Constraints on the Dark Matter Total Annihilation Cross Section
• Refined Bounds on MeV-scale Thermal Dark Sectors from BBN and the CMB
• BBN And The CMB Constrain Neutrino Coupled Light WIMPs
• Testing MeV dark matter with neutrino detectors
• Precise WIMP Dark Matter Abundance and Standard Model Thermodynamics
• Dirac dark matter with a charged mediator: a comprehensive one-loop analysis of the direct detection phenomenology
• Migdal effect and photon Bremsstrahlung: improving the sensitivity to light dark matter of liquid argon experiments
• Monochromatic dark neutrinos and boosted dark matter in noble liquid direct detection
• Current status and muon $g-2$ explanation of lepton portal dark matter
• Searching for Sub-GeV Dark Matter in the Galactic Centre using Hyper-Kamiokande
• Search for U(1)${}_{L_{\mu }-L_{\tau }}$ charged Dark Matter with neutrino telescope

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• Lepton portal dark matter at muon colliders: Total rates and generic features for phenomenologically viable scenarios
• Searching for lepton portal dark matter with colliders and gravitational waves
• Systematic approach to $B$-physics anomalies and $t$-channel dark matter
• New Laboratory Constraints on Neutrinophilic Mediators
• Light lepton portal dark matter meets the LHC
• Minimal realization of light thermal Dark Matter
• Phenomenology of fermion dark matter as neutrino mass mediator with gauged B-L
• Electroweak Symmetry Breaking and WIMP-FIMP Dark Matter
• Light Neutrinophilic Dark Matter from a Scotogenic Model
• Neutrino portals to MeV WIMPs with s-channel mediators
• Neutrino masses and mixing from milli-charged dark matter
• Extending the Dark Matter Reach of Water Cherenkov Detectors using Jupiter
• Searching for MeV-mass neutrinophilic Dark Matter with Large Scale Dark Matter Detectors
• Renormalization Group Running of the Minimal Leptophilic Dark Matter Model toward a UV Completion