Ten years ago, just about any nuclear physicist could tell you the approximate size of the proton. But that changed in 2010, when atomic physicists unveiled a new method that promised a more precise measurement. The new quantity came up 4% shorter than expected, setting off a scramble within the nuclear and atomic physics communities to determine if this discrepant result was due to new physics or an indication of problems with the extractions of the quantity from experiments.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science http://bit.ly/2L37Jwh
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