Saturday, October 12, 2019

Wikipedia Says: Proton Radius Puzzle Solved

The proton radius puzzle was an unanswered problem in physics relating to the size of the proton.[1] Historically the proton radius was measured via two independent methods, which converged to a value of about 0.877 femtometres (1 fm = 10−15 m). This value was challenged by a 2010 experiment utilizing a third method, which produced a radius about 5% smaller than this, or 0.842 femtometres.[2] The discrepancy was resolved when research conducted by Hessel et al. confirmed the same radius for 'electronic' hydrogen as well as it's 'muonic' variant.[3]
So, they consider it resolved with no theory, no calculation that correlates with or predicts the proton radius.



The Surfer, OM-IV