[ntp:questions] Accuracy of NTP - Advice Needed

John Hasler jhasler at newsguy.com
Fri Dec 23 23:32:16 UTC 2011


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).
-- 
John Hasler 
jhasler at newsguy.com
Dancing Horse Hill
Elmwood, WI USA



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