We now have yet another indication that neutrinos cannot travel faster than the speed of light after all, provided by a neighbor of the OPERA detector that set off the fuss in the first place. OPERA’s detector sits deep underground at Gran Sasso in Italy, where it receives neutrinos from a beam generated at CERN, 730 km away on the French-Swiss border. Because the neutrino beam spreads out over the intervening distance, it’s possible to run multiple detectors at the same site, all listening in on the same beam. The team running one of Gran Sasso’s other detectors (called ICARUS) has now performed time-of-flight measurements on neutrinos and determined that they don’t seem to be moving faster than light.
These results are significant because they largely took advantage of precisely the same infrastructure used to generate the OPERA results.
via Wired
Image: Top of the ICARUS experiment setup. ICARUS.
