Correct me if I'm mistaken, but 3 sigma means that there is about a 1 in 1,000 chance that the result can be attributed to a statistical fluctuation in the data, right (??)
It seems that in particle physics, 3 sigma creates 'interest', but everywhere else (generally), 5 sigma, (~ 1 in 1 mill chance that the result is a fluke), is needed to claim a discovery.
Recently, (in June), Femilab reported a possible new particle had been discovered but when checked by a second detector, they found slightly less than the 5 sigma level, so the new particle announcement was deemed not valid.
So in these guys' words:
Quote:
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With more data, the current 3-sigma signal should strengthen sufficiently to claim a solid discovery.
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Hmm … maybe …
5 sigma seems to be what they need in order to make the ultimate claim of 'discovery' ..
Cheers