Eric Hessels

Eric A. Hessels is a Canadian physicist, currently a Canada Research Chair and Distinguished Research Professor at York University in Toronto, Ontario.[1][2][3][4] In September 2019, Hessels et al. measured the Lamb shift for hydrogen to measure the radius of a proton and demonstrated that it is consistent with the value obtained for muonic hydrogen. This proved that the supposed discrepancy known as the proton radius puzzle did not exist.[5]

References
  1. "Eric Hessels". yorku.ca. Archived from the original on February 24, 2017. Retrieved February 24, 2017.
  2. "Distinguished Research Professors". yorku.ca. Retrieved February 24, 2017.
  3. "Canada Research Chair". gc.ca. Retrieved February 24, 2017.
  4. "Prize". aps.org. Retrieved February 24, 2017.
  5. Wolchover, Natalie. "Physicists Finally Nail the Proton's Size, and Hope Dies". Quanta Magazine. Retrieved 2019-09-18.


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