Sneutrino Dark Matter in Gauged Inverse Seesaw Models for Neutrinos

Haipeng An, P. S. Bhupal Dev, Yi Cai, and R. N. Mohapatra

Phys. Rev. Lett. 108, 081806 – Published 23 February 2012

Abstract

Extending the minimal supersymmetric standard model to explain small neutrino masses via the inverse seesaw mechanism can lead to a new light supersymmetric scalar partner which can play the role of inelastic dark matter (IDM). It is a linear combination of the superpartners of the neutral fermions in the theory (the light left-handed neutrino and two heavy standard model singlet neutrinos) which can be very light with mass in $\sim 5 - 20 GeV$ range, as suggested by some current direct detection experiments. The IDM in this class of models has keV-scale mass splitting, which is intimately connected to the small Majorana masses of neutrinos. We predict the differential scattering rate and annual modulation of the IDM signal which can be testable at future germanium- and xenon-based detectors.

Received 7 October 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.081806

Authors & Affiliations

Haipeng An^1,2, P. S. Bhupal Dev¹, Yi Cai³, and R. N. Mohapatra¹

¹Maryland Center for Fundamental Physics and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
²Perimeter Institute, Waterloo, Ontario N2L 2Y5, Canada
³Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China