None were able to do so: Every time, neutrinos appeared to obey the speed limit of light. Labs around the world, including the other experiments at Gran Sasso - called Borexino, ICARUS and LVD - as well as the MINOS experiment in Illinois and the T2K project in Japan, tried to recreate the OPERA findings.
"The story captured the public imagination, and has given people the opportunity to see the scientific method in action - an unexpected result was put up for scrutiny, thoroughly investigated and resolved in part thanks to collaboration between normally competing experiments," Bertolucci said. The OPERA researchers weren't sure what could explain their anomalous results, having checked and rechecked their work, so they released their findings to the larger community of physicists in hopes that experts around the world could help them figure it out.
All four, including the experiment behind the first faster-than-light findings, called OPERA, found that this time around, the nearly massless neutrinos traveled quickly, but not that quickly. The new findings come from four experiments that study streams of neutrinos sent from CERN in Geneva to the INFN Gran Sasso National Laboratory in Italy. "Although this result isn't as exciting as some would have liked, it is what we all expected deep down," Bertolucci said in a statement. Physicist Sergio Bertolucci, research director at Switzerland's CERN physics lab, presented the results today (June 8) at the 25th International Conference on Neutrino Physics and Astrophysics in Kyoto, Japan. The same lab that first reported the shocking results last September, which could have upended much of modern physics, has now reported that the subatomic particles called neutrinos "respect the cosmic speed limit." The final nail in the coffin may have been dealt to the idea that neutrino particles can travel faster than light.
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