Milli-interacting Dark Matter

Abstract

We present a dark matter model reproducing well the results from DAMA/LIBRA and CoGeNT and having no contradiction with the negative results from XENON100 and CDMS-II/Ge. Two new species of fermions F and G form hydrogen-like atoms with standard atomic size through a dark U(1) gauge interaction carried out by a dark massless photon. A Yukawa coupling between the nuclei F and neutral scalar particles S induces an attractive shorter-range interaction. This dark sector interacts with our standard particles because of the presence of two mixings, a kinetic photon-dark photon mixing, and a mass σ-S mixing. The dark atoms from the halo diffuse elastically in terrestrial matter until they thermalize and then reach underground detectors with thermal energies, where they form bound states with nuclei by radiative capture. This causes the emission of photons that produce the signals observed by direct-search experiments.

14 pages, 3 figures

References in corpus (11)

• Dark Matter Results from 225 Live Days of XENON100 Data
• New results from DAMA/LIBRA
• Results from 730 kg days of the CRESST-II Dark Matter Search
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• CoGeNT: A Search for Low-Mass Dark Matter using p-type Point Contact Germanium Detectors
• Double-Disk Dark Matter
• Turning off the Lights: How Dark is Dark Matter?
• Millicharged Atomic Dark Matter
• Mirror dark matter interpretations of the DAMA, CoGeNT and CRESST-II data
• The nucleon-sigma coupling constant in QCD Sum Rules
• Towards Nuclear Physics of OHe Dark Matter

Cited by in corpus (9)

• Fundamental Particle Structure in the Cosmological Dark Matter
• Dark Atoms and Puzzles of Dark Matter Searches
• Dark antiatoms can explain DAMA
• Effects of dark atom excitations
• Strongly interacting dark matter and the DAMA signal
• Milli-interacting dark matter interpretation of the direct-search experiments
• Optical dispersion of composite particles consisting of millicharged constituents
• Glow in the Dark Matter: Observing galactic halos with scattered light
• The Terrestrial Density of Strongly-Coupled Relics