R. L. Workman

Extended partial-wave analysis of piN scattering data

We present results from a comprehensive partial-wave analysis of {pi}{sup {+-}}p elastic scattering and charge-exchange data, covering the region from threshold to 2.6 GeV in the lab pion kinetic energy, employing a coupled-channel formalism to simultaneously fit {pi}{sup -}p{yields}{eta}n data to 0.8 GeV. Our main result, solution SP06, utilizes a complete set of forward and fixed-t dispersion relation constraints applied to the {pi}N elastic amplitude. The results of these analyses are compared with previous solutions in terms of their resonance spectra and preferred values for couplings and low-energy parameters.

Analysis of pion photoproduction data

A partial-wave analysis of single-pion photoproduction data has been completed. This study extends from threshold to 2 GeV in the laboratory photon energy, focusing mainly on the influence of new measurements and model-dependence in the choice of parameterization employed above the two-pion threshold. Results are used to evaluate sum rules and estimate resonance photo-decay amplitudes. These are compared to values obtained in the MAID analysis.

Updated analysis of NN elastic scattering to 3-GeV

A partial-wave analysis of

Nonstrange and other flavor partners of the exoticΘ+baryon

NN

Parameterization dependence of T matrix poles and eigenphases from a fit to

elastic scattering data has been updated to include a number of recent measurements. Experiments carried out at the Cooler Synchrotron (COSY) by the EDDA Collaboration have had a significant impact above 1 GeV. Results are discussed in terms of the partial-wave and direct-reconstruction amplitudes.

\pi

Given presently known empirical information about the exotic

N elastic scattering data

{\ensuremath{\Theta}}^{+}

The SAID PWA program

baryon, we analyze possible properties of its

Amplitude analysis of gamma n --> pi- p data above 1 GeV

\text{SU}{(3)}_{F}

Low-energy eta N interactions: Scattering lengths and resonance parameters

partners, paying special attention to the nonstrange member of the antidecuplet