The Proton Radius - Nuclear Physics' Newest Puzzle
The radius of the proton, generally assumed to be a well measured and understood quantity has recently come under scrutiny due to highly precise, yet conflicting, experimental results. These new results have generated a host of interpretations, none of which are completely satisfactory. I will present a general overview to the topic, from the early measurements of the 1950s to the high precision experiments performed today. I will further discuss the various radii and measurements and present some of the attempted explanations for the discrepancies observed.