The team, who work on an experiment called Icarus, tested an argument described in a recent paper by Andrew Cohen and Sheldon Glashow at Boston University, who claimed that faster-than-light or "superluminal" neutrinos would lose energy by spewing out electrons and their antimatter partners, called positrons. Professor Glashow shared the Nobel prize for physics in 1979.
When Maddalena Antonello and others on the Icarus team analysed the energy of the neutrinos arriving at Gran Sasso, they found no evidence that they had lost energy the way Cohen and Glashow predicted. The finding has bolstered the view of many physicists who believe the Opera result is an error of measurement.
But that could also mean that Cohen and Glashow are wrong. In itself, it does not prove that the neutrinos didn't get there aster than light.