At 08:16 21-11-11, you wrote:

I heard on the BBC the other day that a repeat experiment is planned, firing neurinos from the US into Canada. The labs were not cited, but I expect it would be Fermilab to Sudbury Ontario. If this is the case, then there will still be the problem of not being able to run a parallel fibre as the Sudbury detectors are also deep underground. This means that the emitter->detector path length will still be a paper length, and if there is a problem with the reference frame definition, or time transfer methodology , then the results may also be subject to questions raised in the case of OPERA. The distance between these labs and the OPERA experiment are of the same order of magnitude so it will be interesting to see what hatches.

Even if you could run a fiber exactly parallel and straight on the neutrino path (drilling a verrrry deep tunnel :-)) then the speed in the fiber will be lower than c, due to the refraction index. So, in any case a synchronization system is needed, and it is not necessary to run a straight fiber.

73 - Marco IK1ODO


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