Je hitrost svetlobe prese¿ena?

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Ob samem rezultatu je zanimivo še to, da je tako neverjeten, da mu niti sami ne upajo verjeti.

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Faster-Than-Light Neutrinos?
Probably not. But maybe! Or in other words: science as usual.

For the three of you reading this who haven’t yet heard about it, the OPERA experiment in Italy recently announced a genuinely surprising result. They create a beam of muon neutrinos at CERN in Geneva, point them under the Alps (through which they zip largely unimpeded, because that’s what neutrinos do), and then detect a few of them in the Gran Sasso underground laboratory 732 kilometers away. The whole thing is timed by stopwatch (or the modern high-tech version thereof, using GPS-synchronized clocks), and you solve for the velocity by dividing distance by time. And the answer they get is: just a teensy bit faster than the speed of light, by about a factor of 10-5. Here’s the technical paper, which already lists 20 links to blogs and news reports.

The things you need to know about this result are:

It’s enormously interesting if it’s right.
It’s probably not right.

By the latter point I don’t mean to impugn the abilities or honesty of the experimenters, who are by all accounts top-notch people trying to do something very difficult. It’s just a very difficult experiment, and given that the result is so completely contrary to our expectations, it’s much easier at this point to believe there is a hidden glitch than to take it at face value. All that would instantly change, of course, if it were independently verified by another experiment; at that point the gleeful jumping up and down will justifiably commence.

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Uporabnik crashednburnt pravi:
Dokler ne da Utiševalec žegna, ne bo nič.

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'There is still room for uncertainty in the neutrinos' departure time, Plunkett says, because there is no neutrino detector on CERN's end of the line. The only way to know when the neutrinos left is to extrapolate from data on the blob of protons used to produce them

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Uporabnik Denis pravi:
Kako že gre tisto...1000 let nazaj so verjeli, da je zemlja središče vesolja....500 let nazaj, da je ploščata, par dni nazaj so verjeli, da nič ne potuje hitreje od svetlobe

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