NEUTRINOS can switch between flavours more rapidly than expected. The result means we could soon learn why the universe is filled with matter instead of featureless radiation.
The three flavours of neutrino – electron, muon and tau – morph into one another. This shape-shifting ability is measured by three parameters: theta12, theta23 and theta13. The first two have been measured precisely, but we only had an estimate for theta13.
Now researchers at the Daya Bay Reactor Neutrino Experiment in southern China (pictured) have seen electron antineutrinos transforming into muon antineutrinos at a rapid rate, which pins down the last parameter ().…
