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<http://news.sciencemag.org/scienceinsider/2012/02/breaking-news-error-undoes-faster.html?ref=hp#.T0U_N0pYVRc.twitter>

BREAKING NEWS: Error Undoes Faster-Than-Light Neutrino Results
by Edwin Cartlidge
22 February 2012, 1:45 PM

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It appears that the faster-than-light neutrino results 
<http://news.sciencemag.org/scienceinsider/2011/11/faster-than-light-neutrinos-opera.html?ref=hp>, 
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.