Money quotes:
#1:A tachyon (play /ˈtæki.ɒn/) is a hypothetical subatomic particle that always moves faster than light. In the language of special relativity, a tachyon would be a particle with space-like four-momentum and imaginary proper time. A tachyon would be constrained to the space-like portion of the energy-momentum graph
Please take note of the word, Hypothetical
#2:Despite the theoretical arguments against the existence of tachyon particles, experimental searches have been conducted to test the assumption against their existence; however, no experimental evidence[5] for the existence of tachyon particles has been found.
Please note the part highlighted.
I also said, Tachyons, not Neutrinos.
We’re talking about a performance speciication ~ names can vary. Remember, we may have discovered it but gave it the wrong name so later on when we know what we ought to name it we can rename it kind of like changing heads on the Brontosaurus ~ once we found out what the right head was (so it had a throat big enough to swallow) we renamed it Aptosaurus (see: http://www.unmuseum.org/dinobront.htm for a fuller explanation)