[ntp:questions] Accuracy of NTP - Advice Needed

jimp at specsol.spam.sux.com jimp at specsol.spam.sux.com
Sat Dec 24 00:48:04 UTC 2011


John Hasler <jhasler at newsguy.com> wrote:
> Richard B. Gilbert wrote:
>> How do you "tag" a neutrino so that you can say with assurance that the
>> the neutrino that left Cern is the same neutrino that arrives at Sasso?
> 
> Jim Pennino writes:
>> By sending them in a "pulse" of a known width.
> 
> It should be noted, however, that you cannot observe the same neutrino
> twice.  In fact, no neutrinos at all are observed at the Cern end: just
> the protons that produce the pions that produce the neutrinos.  An
> upcoming experiment at Fermilab will observe neutrinos at both ends (the
> far end will be in Minnesota).

And your point would be?


-- 
Jim Pennino

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