Direct dark matter searches via pseudo-scalar portal

Paolo Panci (1)

1 IAP - Institut d'Astrophysique de Paris

We study a Dirac Dark Matter (DM) particle interacting with ordinary matter via a pseudo-scalar portal, and analyze its impact on direct detection experiments. This candidate can accommodate the long-standing DAMA modulated signal and yet be compatible with all exclusion limits at 99_S% CL. This result holds for natural choices of the pseudo-scalar-quark couplings, and give rise to a significant enhancement of the DMproton coupling with respect to the coupling to neutrons. The model could be tested with measurements of rare meson decays, flavor changing processes, and searches for axion-like particles with mass in the MeV range.

Mots clés: MG14 Proceedings; particle: interaction; meson: decay; dark matter: relic density; axion-like particles; dark matter: direct detection; flavor changing; enhancement; DAMA; flux: time dependence

Domaines: Astrophysique [astro-ph]; Physique des Hautes Energies - Phénoménologie [hep-ph]

Paolo Panci. Direct dark matter searches via pseudo-scalar portal. 14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. pp.2393-2401, ⟨10.1142/9789813226609_0280⟩. ⟨hal-01669604⟩