Physics Seminar

Ashot Gasparian

NC A&T State Univeristy USA The Proton Radius: Preliminary Result from the PRad Experiment Abstract: Two new extremely high precision measurements of the proton rms charge radius performed in 2010-2012 with muonic hydrogen atom demonstrated up to six standard deviations smaller values than the accepted average from all previous experiments performed with different methods on regular hydrogen. This discrepancy triggered the well known “proton radius puzzle” in hadronic physics. To address this puzzle, the PRad collaboration in May-June 2016 performed a novel magnetic-spectrometer-free ep-scattering experiment in Hall B at JLab accumulating high statistics and a rich experimental data set. The specifics of the PRad experiment and the preliminary physics result of the extracted proton radius will be presented in this talk.

October 12, 2018
10:30 am