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<p>Theory Center Seminar<br>
Monday, May 15, 2017<br>
1:00 p.m. (coffee at 12:45 p.m.)<br>
CEBAF Center, Room F113<br>
<font color="#0f61c8"><br>
</font>Astrid Hiller-Blin<br>
Valencia University<br>
<br>
<b>Electromagnetic interactions with Light Baryons in Covariant
ChPT</b><br>
<font color="#0f61c8"><br>
</font>We study the low-energy behaviour of baryons subjected to
external electromagnetic fields using fully <br>
covariant ChPT with the explicit inclusion of spin-3/2 degrees of
freedom. The processes studied are <br>
Compton scattering off baryon targets, as well as meson
photoproduction. On the one hand, the goal <br>
of the study of scattering reactions is to extract clean
information about observables such as polarizabilities, <br>
electric dipole moments, charge radii and electromagnetic
densities. On the other hand, the analysis of <br>
meson-production cross sections allows one to get information
about LECs, resonances and the convergence<br>
behaviour of ChPT. We predicted some hyperon electromagnetic
properties for the first time, and also achieved<br>
the reproduction of the threshold neutral pion photoproduction
data up to photon energies above 200 MeV. </p>
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