Scientists from Cern have repeated their stunning experiment that seemed to show neutrinos travelling faster than light. And in results posted online early Friday, they say they have once again found the neutrinos to be behaving in this wholly unpredicted way. That’s despite having fine-tuned the experiment in the wake of suggestions about their methods.
There was something of a frenzy back in September when it was first reported that neutrinos seemed to be able to exceed light speed, something that should not be possible according to the laws of physics as we understand them. The physicists at Cern who made the discovery called for others to check their methods and try to find an error.
The lates test was in response to a suggestion that the pulse of neutrinos used in the original test was fairly long, possibly opening up errors. This time, a shorter pulse was used, with longer gaps in-between. Still, the neutrinos showed up faster than they should if they were staying below the speed of light.