[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Wed., Feb. 3, 2010
3:00 p.m.
CEBAF Center, Room A110

*Pion-Nucleon Scattering Around the Delta-Isobar Resonance*

Bingwei, Long
ECT*, Trento, Italy

Besides the nucleon, the pion and delta-isobar are important ingredients 
in low-energy
strong interactions due to their light mass (pion) or small excitation 
above the nucleon
(delta). Chiral EFT provides a powerful tool to include these three in 
nuclear physics.
We develop a generalized version of heavy-baryon chiral perturbation 
theory for low-
energy pion-nucleon scattering, so that both the threshold and delta 
resonance regions
are described in a unified framework. P-wave phase shifts are calculated 
up to the third
order in our power counting.
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