IceCube's search for sterile neutrinos draws a blank

[Michael]

http://physicsworld.com/cws/article...es-search-for-sterile-neutrinos-draws-a-blank

Previous sightings ruled out

According to the IceCube collaboration, these results do not rule out sterile neutrinos completely, but they do exclude much of the parameter space in which they could exist. In particular, the results exclude, with a confidence level of approximately 99%, the allowed parameter space for several experiments that had observed anomalies in neutrino oscillations, which had been interpreted as possible signs of sterile neutrinos.

I see this (non) finding was published a couple of months ago, but I just noticed it today.

 

[Michael]

On a related note:

http://phys.org/news/2016-07-wings-icarus-flight-neutrino.html

Some theories ascribe this apparently strange neutrino behaviour to the presence of a fourth, sterile, neutrino flavour. The suite of experiments of the SBN programme are meant to cast light on this mystery.