Do neutrinos have tachyonic characteristics??

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ijaz

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Do neutrinos have tachyonic characteristics??
« on: 04/12/2015 12:56:29 »
Are there any tachyonic neutrinos and do they exist??

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Offline Atomic-S

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Re: Do neutrinos have tachyonic characteristics??
« Reply #1 on: 06/12/2015 02:25:30 »
I don't believe there is any evidence for them. The faster-than-light neutrinos reported a while back were later ascribed to experimental error.
 

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Offline evan_au

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Re: Do neutrinos have tachyonic characteristics??
« Reply #2 on: 06/12/2015 06:43:47 »
Part of the problem was traced to a loose connector in a timing circuit.
See http://en.wikipedia.org/wiki/Faster-than-light_neutrino_anomaly

When this was fixed, and the experimental design optimized a bit, the results suggested that the neutrinos were travelling immeasurably close to the speed of light.

This was no surprise to astrophysicists, since neutrinos detected from a supernova in the Magellanic Cloud galaxy arrived at pretty much the same time as the visible flash.

Since Neutrinos from nuclear events typically have energy > 1,000,000 eV, and neutrinos are thought to have a rest mass of < 1eV, the Lorentz factor=√1-v2/c2 is > 1 million.

This means that if neutrinos obey Special Relativity (and scientists think that they do), they will be travelling extremely close to the speed of light.