Proton Charge Radius (PRad) Experiment at Jefferson Lab
1 Duke University, Durham, NC 27708, U.S.A.
2 Duke Kunshan University, Kunshan, Jiangsu, China 215316
Published online: 25 March 2016
The puzzle of proton charge radius was recently raised by the measurement of muonic hydrogen Lamb shift at Paul Scherrer Institute (PSI), whose results were seven standard deviations smaller than the CODATA recommended value. To investigate this discrepancy, the PRad experiment was proposed and approved at Thomas Jefferson National Accelerator Facility (JLab). The experiment will extract the proton charge radius with a sub-percent accuracy by measuring the cross-sections of unpolarized electronproton elastic scattering in an unprecedented low Q2 region (2×10−4 GeV2/c2).
© Owned by the authors, published by EDP Sciences, 2016
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