Oliver Thewalt

    Oliver Thewalt

    Theoretical Physics | Quantum Biology | Dark Matter Research Cluster

    Proton-size puzzle deepens

    http://www.nature.com/news/proton-size-puzzle-deepens-1.22760?WT.ec_id=NEWSDAILY-20171006
    Proton-size puzzle deepens
     
    Measurement in ordinary hydrogen agrees with a surprising 2010 result on the element's exotic cousin — but gives a smaller value than virtually every other experiment.
     
    The proton might truly be smaller than was thought. Experiments on an exotic form of hydrogen first found1 a puzzling discrepancy with the accepted size in 2010. Now, evidence from a German and Russian team points to a smaller value for the size of the proton with ordinary hydrogen, too.
     
    The results, which appeared on 5 October in Science2, could be the first step towards resolving a puzzle that has made physicists doubt their most precise measurements, and even their most cherished theories.
     
    Still, “before any resolution, this new value has to be confirmed”, says Jan Bernauer, a physicist at the Massachusetts Institute of Technology in Cambridge. If other labs confirm it, he adds, “then we can find why the old experiments were wrong, hopefully”.
     
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