Evidently the first thing the folks at OPERA should have done when going over all their lab results after they found neutrinos beating the speed of light by 60ns (also covered further, and further still, previously on my blog), was to check all the cables.
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.
Continue reading “Trick to going faster than light: loosen some cables”
A paper by another team at Gran Sasso, ICARUS, contradicts the OPERA neutrino results by measuring the energy spectrum of the supposedly speeding neutrinos and finds that they could not have traveled faster than light.
Continue reading “OPERA still wrong, says ICARUS: neutrinos show energy signature for obeying speed limit”
Via Science 2.0:
So what does OPERA find ? Their main result, based on the 15,233 neutrino interactions collected in three years of data taking, is unchanged from the September result. The most interesting part of the new publication is instead that the find that the 20 new neutrino events (where neutrino speeds are individually measured, as opposed to the combined measurement done with the three-year data published in September) confirm the earlier result: the arrival times appear to occur about 60 nanoseconds before they are expected.
Continue reading “OPERA duplicates previous results: neutrinos still 60ns too fast”