EPFL seminars

Review of the proton radius puzzle

by Maksim Pospelov (Univ. of Victoria and Perimeter Institute)

Monday, 27 January 2014 from to (Europe/Zurich)
at EPFL, Cubotron 727
 Description Recent measurements of the Lamb shift in the muonic hydrogen and deuterium revealed a puzzling discrepancy with similar measurements in e-p systems. This is often presented as a difference in the value for the proton charge radius. The origin of the discrepancy is not known, and in my talk I will cover possible scenarios for its resolution: an experimental error, quot;unusualquot; QCD effects, or new MeV-scale forces.