Particle Seminar, Tuesday, October 1, 2013 @ 4:15pm

Subject: Particle Seminar, Tuesday, October 1, 2013 @ 4:15pm

From: "Colbourn, Kelly" <kcolbourn fas harvard edu>

Date: Mon, 30 Sep 2013 13:06:27 +0000

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Thread-topic: Particle Seminar, Tuesday, October 1, 2013 @ 4:15pm

Tuesday, October 1, 2013 4:15 PM

Harvard University
Particle Seminar

Title: "Review of the proton radius puzzle: is it about the proton or muon ?"

Maxim Pospelov

(Perimeter/Victoria)
Jefferson Lab, 453
Refreshments in the high energy theory coffee area, 4th floor Jefferson,
at 4:00.

Abstract:

Recent measurements of the Lamb shift in muonic hydrogen (and deuterium)

when interpreted in terms of the proton charge radius reveal a puzzling ~7 sigma

discrepancy compared to r_p determination in other systems. I discuss this problem

from several angles, and focus on theoretical speculations about possible new "medium-range" forces that skew the interpretations of the muH Lamb shift measurements.