[Jlab-seminars] Today's Physics Seminar: Gil Paz; The Proton Radius Puzzle

[Stephanie Tysor]

Physics Seminar 

Gil Paz 

Wayne State University 



The Proton Radius Puzzle 





Abstract: 



In 2010 the proton charge radius was extracted for the first time from muonic hydrogen, 
a bound state of a muon and a proton. The value obtained was five standard deviations away 
from the regular hydrogen extraction. Taken at face value, this might be an indication of a 
new force in nature coupling to muons, but not to electrons. It also forces us to reexamine 
our understanding of the structure of the proton. 

In this talk I will describe an ongoing theoretical research effort that seeks to address and 
resolve this "proton radius puzzle". In particular, I will present a reevaluation of the proton 
structure effects, correcting 40 years of such calculations, and the development of new effective 
field theoretical tools that would allow to directly connect muonic hydrogen and muon-proton 
scattering. 




Friday, March 23, 2018 

11:00am 

CEBAF Auditorium 





Upcoming Seminar Speakers 
------------------------- 

April 20th : J.-C. Peng 
April 27th : Camillo Mariani 
June 1st : Craig Roberts 

-- 
Stephanie Tysor 
Hall A Administrative Assistant 
Thomas Jefferson National Accelerator Facility 
(office)757-269-6005 (fax)757-269-5235 
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