[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, Nov. 21, 2016
2:45 p.m. (coffee at 2:30 p.m.)
CEBAF Center, Room F324/325

Dmitrij Siemens
Bochum University*
*

*
**Pion-Nucleon Scattering in Chiral Perturbation Theory*

Elastic pion-nucleon scattering is analyzed in the framework of chiral 
perturbation theory at
the full one-loop order with explicit Delta degrees of freedom. The 
analysis is performed in
the small scale expansion within the heavy baryon and a covariant 
approach based on the extended
on mass-shell renormalization scheme. The pertinent low-energy constants 
contributing to the
pion-nucleon scattering amplitude are extracted from fits to 
experimental scattering data as
well as subthreshold parameters. A novel approach to estimate the 
theoretical uncertainty based
on the truncation of the chiral series is employed in the fitting 
procedure. The obtained results
for the various pion-nucleon scattering observables are presented and 
discussed.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/jlab-seminars/attachments/20161118/379a8970/attachment.html>