Fermionic Dark Matter through a Light Pseudoscalar Portal: Hints from the DAMA Results

Abstract

We study the fermionic dark matter (DM) particle interacting with Standard Model quarks via a light pseudoscalar mediator. We consider separately the scenarios for which the DM-pseudoscalar coupling is $CP$ conserving or $CP$ violating. We show that taking a contact interaction is not suitable, even when the mediator has a mass of the same order of magnitude as the typical momentum transfer at the direct-detection experiments, such that the allowed DAMA region is excluded or considerably modified by the correct relic density requirement. The DAMA result seems to indicate that the $CP$-violating interaction is dominant at direct searches. We find that, if the proton-to-neutron effective coupling ratio is $-60\sim -40$, the exclusion limits set by SuperCDMS, XENON100, and LUX are highly suppressed, and the DAMA signal can thus be easily reconciled with these null measurements. For this model, the allowed region determined by the DAMA signal and correct relic density can successfully satisfy the conditions required by the thermal equilibrium, big bang nucleosynthesis, and DM self-interactions. The results of future measurements on flavor physics will provide important constraints on the related models. Precise measurements performed by COUPP, PICASSO, SIMPLE and KIMS should be able to test this model in the near future.

31 pages, 6 figures, 7 tables, typos in Sec. IV corrected

References in corpus (24)

• Dark Matter Results from 225 Live Days of XENON100 Data
• New results from DAMA/LIBRA
• Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
• The RAVE Survey: Constraining the Local Galactic Escape Speed
• Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
• First dark matter search results from a 4-kg CF${}_3$I bubble chamber operated in a deep underground site
• Non-relativistic effective theory of dark matter direct detection
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• Constraints on Low-Mass WIMP Interactions on 19F from PICASSO
• A taste of dark matter: Flavour constraints on pseudoscalar mediators
• A Renormalizable Model for the Galactic Center Gamma Ray Excess from Dark Matter Annihilation
• New Limits on Interactions between Weakly Interacting Massive Particles and Nucleons Obtained with CsI(Tl) Crystal Detectors
• Hidden On-Shell Mediators for the Galactic Center Gamma-Ray Excess
• Not so Coy Dark Matter explains DAMA (and the Galactic Center excess)
• NMSSM Interpretation of the Galactic Center Excess
• The Galactic Center Excess from the Bottom Up
• Fermionic dark matter with pseudo-scalar Yukawa interaction
• Global fits of the dark matter-nucleon effective interactions
• The Fermionic Dark Matter Higgs Portal: an effective field theory approach
• Supersymmetric Sub-Electroweak Scale Dark Matter, the Galactic Center Gamma-ray Excess, and Exotic Decays of the 125 GeV Higgs Boson
• Towards a Supersymmetric Description of the Fermi Galactic Center Excess
• Extending LHC Coverage to Light Pseudoscalar Mediators and Coy Dark Sectors
• Measurement of partial branching fractions of inclusive charmless B meson decays to K+, K0, and pi+
• Comment on "Dark Matter with Pseudoscalar-Mediated Interactions Explains the DAMA Signal and the Galactic Center Excess"

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