An Extra-Dimensional Model of Dark Matter

Abstract

We present a model for dark matter with extra spatial dimensions in which Standard-Model (SM) fermions have localized wave functions. The underlying gauge group is $G_{\mathrm{SM}}\otimes \mathrm{U}(1{)}_z$, and the dark matter particle is a SM-singlet Dirac fermion, $\chi$, which is charged under the $\mathrm{U}(1{)}_z$ gauge symmetry. We show that the conventional wisdom that the mass of a Dirac fermion is naturally at the ultraviolet cutoff scale does not hold in this model. We further demonstrate that this model yields a dark matter relic abundance in agreement with observation and discuss constraints from direct and indirect searches for dark matter. The dark matter particle interacts weakly with matter and has negligibly small self-interactions. Very good fits to data from cosmological observations and experimental dark matter searches are obtained with $m_{\chi }$ in the multi-TeV range. A discussion is given of observational signatures and experimental tests of the model.

14 pages, 5 figures

References in corpus (16)

• Ultralight scalars as cosmological dark matter
• Results from a search for dark matter in the complete LUX exposure
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Primordial Black Holes as Dark Matter: Recent Developments
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Disruption of Dark Matter Substructure: Fact or Fiction?
• Dark Matter Search Results from the Complete Exposure of the PICO-60 C${}_3$F${}_8$ Bubble Chamber
• Constraining the Spin-Dependent WIMP-Nucleon Cross Sections with XENON1T
• Limits on spin-dependent WIMP-nucleon cross section obtained from the complete LUX exposure
• Interacting Dark Sector and Precision Cosmology
• The AGORA High-resolution Galaxy Simulations Comparison Project. III: Cosmological zoom-in simulation of a Milky Way-mass halo
• CMB Constraints On The Thermal WIMP Mass And Annihilation Cross Section
• Gravity-Mediated Dark Matter Annihilation in the Randall-Sundrum Model
• Baryon-Number-Violating Nucleon and Dinucleon Decays in a Model with Large Extra Dimensions
• Neutrino Masses and Mixing in Models with Large Extra Dimensions and Localized Fermions
• Thick Branes in Extra Dimensions and Suppressed Dark Couplings

Cited by in corpus (4)

• Effective Leptophilic WIMPs at the $e^{+}{e}^{-}$ collider
• Warm dark matter from a gravitational freeze-in in extra dimensions
• Fitting a Self-Interacting Dark Matter Model to Data Ranging From Satellite Galaxies to Galaxy Clusters
• Charged lepton flavor violating processes in the Grimus-Neufeld model