Having published results earlier this Fall that neutrinos were observed apparently traveling faster than the speed of light, the CERN has made some modifications to their setup based on others critiques and re-run their experiment. They observe the same effect.
The initial series of experiments, comprising 16,000 separate measurements spread out over three years, found that the neutrinos arrives 60 billionths of a second faster than light would have, travelling unimpeded over the same distance.
The idea that nothing can exceed the speed of light in a vacuum forms a cornerstone in physics – first laid out by James Clerk Maxwell and later incorporated into Albert Einstein’s theory of special relativity.
Initial analysis of the work by the wider scientific community argued that the relatively long bunches of neutrinos could introduce a significant error into the measurement.
Those bunches lasted 10 millionths of a second – 160 times longer than the discrepancy the team initially reported in the neutrinos’ travel time.
To address that, scientists at Cern adjusted the way in which the proton beams were produced, resulting in bunches just three billionths of a second long, so the Opera collaboration could repeat the measurements.
I believe Fermi Lab is in the process of trying to duplicate the original experiment (it’s the only facility currently operating that can achieve the necessary energies. Let’s see what they find!