Researchers have recently extracted the proton mass radius from experimental data. A research group at the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences (CAS) presented an analysis of the proton mass radius in Physical Review D on May 11. The proton mass radius is determined to be 0.67 ± 0.03 femtometers, which is obviously smaller than the charge radius of the proton.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/3w6IbTz
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