[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, May 8, 2017
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102

*Jannes Nys
Ghent University

**Using Finite-Energy Sum Rules to Connect High- and Low-Energy Amplitudes*

While the nucleon excitation spectrum below 2 GeV is fairly well 
explored experimentally, little is known
about the resonances above this mass. Since the number of relevant 
partial waves grows with energy,
additional theoretical constraints are necessary to constrain the 
amplitudes. Dispersive approaches allow
one to use high-energy data to constrain the low-energy models that aim 
at mapping the baryon spectrum.
I illustrate how the dispersive approach of Finite-Energy Sum Rules can 
be used to do the inverse: predicting
the scattering amplitudes at high energies based on low-energy models.
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