Conveners
Parallel Session 2 - Hadron Structure & Meson-Baryon Interaction WG
- Martin Hoferichter (TU Darmstadt)
- Andre Walker-Loud (College of William and Mary)
- Patricia Solvignon (University of New Hampshire)
Harald W. Griesshammer
(George Washington University, Washington)
6/29/15, 4:20 PM
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
Compton scattering from protons and neutrons probes the two-photon response of the nucleon in electric and magnetic fields at fixed photon frequency and multipolarity [1]. It provides detailed tests of the symmetries and strengths of the interactions of the nucleonic constituents with each other and with photons. Proton-neutron differences explore the interplay between chiral symmetry breaking...
Gerald Feldman
(George Washington University, Washington)
6/29/15, 4:50 PM
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
The electric and magnetic polarizabilities of the proton are now relatively well known, owing to Compton scattering measurements on hydrogen targets over the past 20 years [1]. However, in the case of the neutron, these structure constants are still quite uncertain, due to the fact that there are no free neutron targets and that quasi-free Compton scattering on a neutron in a nucleus has a...
Jose Manuel Alarcon
(University of Bonn)
6/29/15, 5:10 PM
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
The electromagnetic structure of the nucleon has an increasing interest for experimental searches of physics beyond the standard model in the precision frontier. The reason is that, due to the remarkable accuracy of the experimental measurements, it is crucial to have a good understanding over all possible contributions. The polarizabilities give the information about the two photon exchange...
Astrid Hiller Blin
(IFIC, University of Valencia)
6/29/15, 5:30 PM
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
We investigate the neutral pion photoproduction on the proton near threshold in covariant chiral perturbation theory with the explicit inclusion of Delta degrees of freedom. This channel is specially sensitive to chiral dynamics and the advent of very precise data from the Mainz microtron has shown the limits of the convergence of the chiral series for both the heavy baryon and the covariant...
Lloyd Cawthorne
(University of Manchester)
6/29/15, 5:50 PM
Hadron Structure and Meson-Baryon Interaction Working Group
Talk
In this talk we will discuss the reaction p + γ → p + π0 and how it has been described using Chiral Perturbation Theory (χPT).
Since the early 1990s χPT has been applied to pion photoproduction. The first study was that of Bernard et al. [1,2], detailing a O(p3) relativistic approach to describe the data from Mainz [3] and Saclay [4] from threshold, Eγ ≈ 145 MeV, to Eγ ≈ 160 MeV. In 1996...
