Subject:Determination of the proton radiusand proton radius puzzle
Speaker：Prof Savely G. Karshenboim（Committee on Data for Science and Technology, Max Planck Institute of Quantum Optics ）
Time：10:00am,14th Jun.,2017
Place:1017 lecture hall,10F, M Building of Institute，WIPM

About the speaker：
2014 (till 31.10.16) scientist (E15) at Max-PlanckInstitut für Quantenoptik, Garching 2011-2014 scientist at Max-Planck-Institut Für Quantenoptik, Garching (a freelancer with honorarium agreement from Feb., 2011)
2015 (till Oct. 2016) Pulkovo observatory: Lead scientist (part time)
2011-2015 Pulkovo obsrevatory: Lead scientist
1983-2011: D.I. Mendeleev Institute: various positions such as engineer, researcher, senior researcher, lead scientist (1999-2002) and head of laboratory (2002-2011)

Abstract:
I will discuss the determination of the proton charge radius by different means including spectroscopy of hydrogen and deuterium, spectroscopy of muonic hydrogen and elastic electron-proton scattering. The most accurate result is from the measurement of the Lamb shift in muonic hydrogen and it is in contradiction with the results from ordinary hydrogen and scattering. I will review the situation and discuss the accuracy and reliability of the involved theory and experiment.