Model-independent extraction of the proton charge radius from PRad data
Abstract
The proton radius puzzle has motivated several new experiments that aim to extract the proton charge radius and resolve the puzzle. Recently, PRad, a new electron-proton scattering experiment at Jefferson Lab, reported a proton charge radius of 0.831 ± 0.007statistical ± 0.012systematic. The value was obtained by using a rational function model for the proton electric form factor. We perform a model-independent extraction using z-expansion of the proton charge radius from PRad data. We find that the model-independent statistical error is more than 50% larger compared to the statistical error reported by PRad.
- Publication:
-
Modern Physics Letters A
- Pub Date:
- June 2021
- DOI:
- 10.1142/S0217732321501431
- arXiv:
- arXiv:2004.03077
- Bibcode:
- 2021MPLA...3650143P
- Keywords:
-
- Proton charge radius;
- electromagnetic form factors;
- elastic scattering;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment;
- Nuclear Experiment;
- Nuclear Theory
- E-Print:
- 11 pages, 4 figures, references added, journal version