Sterile Neutrino as Dark Matter Candidate from Cmb Alone
نویسندگان
چکیده
Distortions of CMB temperature and polarization maps caused by gravitational lensing, observable with high angular resolution and sensitivity , can be used to constrain the sterile neutrino mass, ms, from CMB data alone. We forecast ms >1.75 keV from Planck and ms >4.97 keV from Inflation Probe at 95% CL, by using the CMB weak lensing extraction .
منابع مشابه
Constraints on sterile neutrino as a dark matter candidate from the diffuse X-ray background
Sterile neutrinos with masses in the keV range are viable candidates for the warm dark matter. We analyze existing data for the extragalactic diffuse X-ray background for signatures of sterile neutrino decay. The absence of detectable signal within current uncertainties of background measurements puts model-independent constraints on allowed values of sterile neutrino mass and mixing angle, whi...
متن کاملSterile neutrinos as the origin of dark and baryonic matter.
We demonstrate for the first time that three sterile neutrinos alone can simultaneously explain neutrino oscillations, the observed dark matter, and the baryon asymmetry of the Universe without new physics above the Fermi scale. The key new point of our analysis is leptogenesis after sphaleron freeze-out, which leads to resonant dark matter production, evading thus the constraints on sterile ne...
متن کاملDark Matter: the Case of Sterile Neutrino∗
An extension of the Standard Model by three right-handed neutrinos with masses smaller than the electroweak scale (the νMSM) can explain simultaneously dark matter and baryon asymmetry of the Universe, being consistent with the data on neutrino oscillations. A dark matter candidate in this theory is the sterile neutrino with the mass in keV range. We discuss the constraints on the properties of...
متن کاملCan sterile neutrinos be the dark matter?
We use the Ly-alpha forest power spectrum measured by the Sloan Digital Sky Survey and high-resolution spectroscopy observations in combination with cosmic microwave background and galaxy clustering constraints to place limits on a sterile neutrino as a dark matter candidate in the warm dark matter scenario. Such a neutrino would be created in the early Universe through mixing with an active ne...
متن کاملComment on “A New Dark Matter Candidate: Non–thermal Sterile Neutrinos”
I point out that the sterile neutrinos suggested as candidates for “cool” Dark Matter will decay through their mixing with light neutrinos. This leads to an upper bound of about 200 keV on the mass of the sterile neutrinos, but might facilitate their detection. Recently Shi and Fuller proposed [1] a new kind of Dark Matter candidate: a sterile neutrino, with small but non–vanishing mixing with ...
متن کامل