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Non- baryonic matter , as implied by the name, is any sort of matter that is not primarily composed of baryons.

But how much of a delay between neutrinos and photons would we expect if the OPERA result applied?

Admittedly, the energy needed to produce a Cepheid-modulating neutrino beam really would be a sizeable fraction of the output of the sun.

One of the only exceptions is the theoretical "sterile neutrino" , represented by a closed loop of string.

The point is to see if they are still muon-neutrinos when they arrive at Super-Kamiokande.

The thinking goes that WIMPs are very heavy, yet like neutrinos they rarely bump into matter to produce a detectable signal.

As the neutrinos emitted this radiation, they ought to have been losing a commensurate amount of energy.

A neutrino with this energy has a good chance of producing a particle known as a W- when it passes through a detector.

Northern-sky neutrinos come streaking upward through the detector, from the bedrock toward the surface of the ice.