[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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