Speaker
Clara Peset
(Universitat Autonoma de Barcelona /IFAE)
Description
We obtain a model independent expression for the muonic hydrogen Lamb shift. The leading hadronic effects are controlled by the chiral theory, which allows for their model independent
determination. We give their complete expression including the pion and Delta particles. Out of this analysis and the experimental measurement of the muonic hydrogen Lamb shift we determine the electromagnetic proton radius: r_p = 0.8412(15) fm. This number is at 6.8\sigma variance with respect to the CODATA value. The parametric control of the uncertainties allows us to obtain a model independent determination of the error, which is dominated by hadronic effects.
Authors
Antonio Pineda
(Universitat Autonoma de Barcelona /IFAE)
Clara Peset
(Universitat Autonoma de Barcelona /IFAE)
