[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, May 15, 2017
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room F113

Astrid Hiller-Blin
Valencia University

*Electromagnetic interactions with Light Baryons in Covariant ChPT*

We study the low-energy behaviour of baryons subjected to external 
electromagnetic fields using fully
covariant ChPT with the explicit inclusion of spin-3/2 degrees of 
freedom. The processes studied are
Compton scattering off baryon targets, as well as meson photoproduction. 
On the one hand, the goal
of the study of scattering reactions is to extract clean information 
about observables such as polarizabilities,
electric dipole moments, charge radii and electromagnetic densities. On 
the other hand, the analysis of
meson-production cross sections allows one to get information about 
LECs, resonances and the convergence
behaviour of ChPT. We predicted some hyperon electromagnetic properties 
for the first time, and also achieved
the reproduction of the threshold neutral pion photoproduction data up 
to photon energies above 200 MeV.

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