Conveners
Parallel Session 1- Hadron Structure & Meson-Baryon Interaction WG
- Martin Hoferichter (TU Darmstadt)
- Andre Walker-Loud (College of William and Mary)
- Patricia Solvignon (University of New Hampshire)
Carl Carlson
(College of William and Mary, Williamsburg)
29/06/2015, 14:30
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
The proton charge radius puzzle exists because the proton charge radius appears different when measured with electrons than when measured with muons. "Ordinary" explanations include problems with the extrapolations or theoretical corrections involved in the measurements, and "exotic" explanations include such beyond the standard model ideas as a breakdown of electron-muon universality. We...
Ricardo Alarcon
(Arizona State University, Tempe)
29/06/2015, 15:00
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
The OLYMPUS experiment will determine the multiple-photon exchange contribution to elastic lepton-proton scattering, the most likely candidate to resolve the discrepancy between measurements of the proton electric to magnetic form factor ratio, determined using the Rosenbluth separation technique and polarization transfer methods. To this end, the experiment measured the cross section ratio of...
Franziska Hagelstein
(Johannes Gutenberg University, Mainz)
29/06/2015, 15:20
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
We present the predictions of baryon chiral perturbation theory (BChPT) for the proton polarizability contribution to the 2P −2S Lamb shift and the 2S hyperfine splitting (HFS) in muonic hydrogen, and compare them to the results of dispersive calculations. The spin-dependent part of the forward doubly-virtual Compton scattering amplitude (S1,2) contributes to the 2S HFS, whereas the...
Nadiia Krupina
(Johannes Gutenberg University, Mainz)
29/06/2015, 15:40
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
We consider the predictions of Chiral Perturbation Theory (ChPT) for the third Zemach moment and Zemach radius and confront them with empirical values. We look at implications of these results for the Lamb shift and hyperfine structure of (muonic) hydrogen.
