Surprise difference in neutrino and antineutrino mass lessening with new measurements from a Fermilab experiment

The physics community got a jolt last year when results showed for the first time that neutrinos and their antimatter counterparts, antineutrinos, might have different masses. A new from the MINOS experiment at the U.S. Department of Energy's Fermi National Accelerator Laboratory appears to quell concerns raised by a MINOS result in June 2010 and brings neutrino and antineutrino masses more closely in sync.

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