Cosmological constraints on Neutrino - Dark Matter interactions

Details Cosmological constraints on Neutrino - Dark Matter interactions Cosmological constraints on Neutrino - Dark Matter interactions

2006-11-29

arxiv.org/abs/astro-ph/0611887v1

Nucl.Phys.Proc.Suppl.168:34-36,2007

Astronomy and Astrophysics

Astrophysics

Talk given at the Neutrino Oscillation Workshop NOW2006, Otranto, Italy, September 9-16 2006

Scientific paper

10.1016/j.nuclphysbps.2007.02.02

I summarize the results of a recent analysis where the cosmological effects of interactions of neutrinos with cold Dark Matter (DM) is investigated. This interaction produces diffusion-damped oscillations in the matter power spectrum, analogous to the acoustic oscillations in the baryon-photon fluid. I discuss the bounds from the Sloan Digital Sky Survey on the corresponding opacity defined as the ratio of neutrino-DM scattering cross section over DM mass, and compare with the constraint from observation of neutrinos from supernova 1987A.

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