P-wave excited baryons from pion- and photo-induced hyperon production
Sep, 2010
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Abstract: (arXiv)
We report evidence for , , , , , and , and find indications that might have a companion state at 1970\,MeV. The controversial is not seen. The evidence is derived from a study of data on pion- and photo-induced hyperon production, but other data are included as well. Most of the resonances reported here were found in the Karlsruhe-Helsinki (KH84) and the Carnegie-Mellon (CM) analyses but were challenged recently by the Data Analysis Center at GWU. Our analysis is constrained by the energy independent scattering amplitudes from either KH84 or GWU. The two amplitudes from KH84 or GWU, respectively, lead to slightly different branching ratios of contributing resonances but the debated resonances are required in both series of fits.Note:
- 22 pages, 28 figures. Some additional sets of data are added
- 11.80.Gw
- 14.20.Gk
- 13.30.Ce
- 11.80.Et
- 13.60.Le
- 13.30.-a
- 13.30.Eg
- hyperon: production
- scattering amplitude
- branching ratio
References(191)
Figures(42)