8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

The Charge Radius of the Proton, a 5 Sigma Discrepancy?

11 Aug 2011, 11:50
551 A (Rhode Island Convention Center)

551 A

Rhode Island Convention Center

Parallel contribution Perturbative and non-Perturbative QCD Perturbative and non-Perturbative QCD


Dr Gil Paz (The University of Chicago)


Recently, the charge radius of the proton was extracted, for the first time, from muonic hydrogen. The value was 5 sigma away from similar measurement of regular hydrogen. The extraction of the charge radius depends on a theoretical input. Together with Richard J. Hill, we are studying the hadronic uncertainty in the theoretical prediction, using the tool of an effective field theory, namely NRQED. In the talk I will report on the results of this study. I will also report on a previous study of the model-independent extraction of the charge radius from electron-proton scattering, which found that previous extractions have typically underestimated their errors.

Primary author

Dr Gil Paz (The University of Chicago)

Presentation Materials