+++ONLINE KOLLOQUIUM+++ Solving the Proton Radius Puzzle (Prof. Douglas Higinbotham)

Datum: 26.05.2020
Uhrzeit: 14:30
Vortragende(r): Prof. Douglas Higinbotham
Jefferson Lab, Newport News Virginia, USA
Ort: +++ONLINE KOLLOQUIUM+++

For many years scientists believed that the proton radius was 0.877(6) fm based on a series of atomic Lamb shift and electron scattering measurements. In 2010, a new type of measurement, making use of muonic hydrogen, determined the radius to be 0.842(1) fm.

The large systematic difference between muonic hydrogen measurements and the previous results has become known as the proton radius puzzle. To solve this puzzle a world-wide theoretical and experimental has been undertaken. I will review the current status of puzzle with an emphasis on the latest electron scattering results and how the radius is extracted from electron scattering data. I will leave it to the audience to decide if the puzzle has now been solved.

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