Dips in the Diffuse Supernova Neutrino Background
  Scalar (fermion) dark matter with mass in the MeV range coupled to ordinary
neutrinos and another fermion (scalar) is motivated by scenarios that establish
a link between radiatively generated neutrino masses and the dark matter relic
density. With such a coupling, cosmic supernova neutrinos, on their way to us,
could resonantly interact with the background dark matter particles, giving
rise to a dip in their redshift-integrated spectra. Current and future neutrino
detectors, such as Super-Kamiokande, LENA and Hyper-Kamiokande, could be able
to detect this distortion.
