Two types of neutron decay produce a proton, an electron and an electron antineutrino but eject them in different configurations, The experiments at NIST detected no imbalance, but the improved sensitivity could help place limits on competing theories about the matter-antimatter imbalance in the universe. (Credit: emiT team)
http://www.sciencedaily.com/releases/2011/11/111109161336.htm
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