Re: Nyt rygte om hurtige neutrinoer
- From: Frank Sørensen <astronom@xxxxxxxxxx>
- To: <astrolist@xxxxxxxxxxxxx>
- Date: Fri, 24 Feb 2012 09:42:58 +0100
Tja - egenligt lidt trist. Det kunne have været morsomt med en reel
udfordring af gamle Einsteins teori.
- Frank
Den 24-02-2012 09:30, Bjarne Thomsen skrev:
> Det amerikanske tidskrift Sciense har denne nyhed:
> by Edwin Cartlidge on 22 February 2012, 1:45 PM | 0 Comments
>
> It appears that the faster-than-light neutrino results, announced last
> September by the OPERA collaboration in Italy, was due to a mistake
> after all. A bad connection between a GPS unit and a computer may be to
> blame.
>
> Physicists had detected neutrinos travelling from the CERN laboratory in
> Geneva to the Gran Sasso laboratory near L'Aquila that appeared to make
> the trip in about 60 nanoseconds less than light speed. Many other
> physicists suspected that the result was due to some kind of error,
> given that it seems at odds with Einstein's special theory of
> relativity, which says nothing can travel faster than the speed of
> light. That theory has been vindicated by many experiments over the decades.
>
> According to sources familiar with the experiment, the 60 nanoseconds
> discrepancy appears to come from a bad connection between a fiber optic
> cable that connects to the GPS receiver used to correct the timing of
> the neutrinos' flight and an electronic card in a computer. After
> tightening the connection and then measuring the time it takes data to
> travel the length of the fiber, researchers found that the data arrive
> 60 nanoseconds earlier than assumed. Since this time is subtracted from
> the overall time of flight, it appears to explain the early arrival of
> the neutrinos. New data, however, will be needed to confirm this hypothesis.
>
> Min egen favoritforklaring var en softwarefejl.
> Der er blevet for lang en vej mellem detektion og fysiker.
> Man har åbenbart glemt det gamle trick med at rokke kablerne.
>
> Bjarne
>
>
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