Neutrino-flavoured sneutrino dark matter

Abstract

A simple theory of supersymmetric dark matter (DM) naturally linked to neutrino flavour physics is studied. The DM sector comprises a spectrum of mixed lhdrhd sneutrino states where both the sneutrino flavour structure and mass splittings are determined by the associated neutrino masses and mixings. Prospects for indirect detection from solar capture are good due to a large sneutrino-nucleon cross-section afforded by the inelastic splitting (solar capture limits exclude an explanation of DAMA/LIBRA). We find parameter regions where all heavier states will have decayed, leaving only one flavour mixture of sneutrino as the candidate DM. Such regions have a unique 'smoking gun' signature-sneutrino annihilation in the Sun produces a pair of neutrino mass eigenstates free from vacuum oscillations, with the potential for detection at neutrino telescopes through the observation of a hard spectrum of ν µ and ν τ (for a normal neutrino hierarchy). Next generation direct detection experiments can explore much of the parameter space through both elastic and inelastic scattering. We show in detail that the observed neutrino masses and mixings can arise as a consequence of supersymmetry breaking effects in the sneutrino DM sector, consistent with all experimental constraints.

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

“…It has been introduced by [56] for reconciling the annual modulation at DAMA [57] experiment and the null results at other experiments, e.g. [58][59][60][61][62][63][64][65][66]. Here we re-investigate [67] the compatibility of the SDDM, explaining the DAMA signal with the most recent exclusion bounds of CDMS-II [68], CRESST-II [69] and Xenon100 [70].…”

Higgs boson mass and complex sneutrino dark matter in the supersymmetric inverse seesaw models

“…trino [28,[30][31][32][33][34]. In this case, the DM-nucleon scattering mediated by Z−boson becomes inelastic and may be kinematically forbidden.…”

Dark matter indirect detection signals and the nature of neutrinos in the supersymmetricU(1)B−Lextension of the standard model

“…3, left-panel, the signal neutrino flux from the Virgo cluster [26], whose contribution is subdominant compared to the GC model. Its DM halo was taken to have an NFW profile [27] ρ(r) = ρ s r r s 1 + r r s 2 −1 (13) with scale radius r s =560 kpc and scale density ρ s =0.012 GeV/cm 3 [28], with a virial mass M = 4.2 × 10 14 M , and its distance was taken to be 15.4 Mpc [29]. While DM halo substructure could in principle increase the flux signal by as much as three orders of magnitude [30], this would still be subdominant, though it could be brighter than the GC if the Milky-Way halo has a cored DM density profile [31].…”