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29 March 2024
 
  » arxiv » 1009.4803

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P-wave excited baryons from pion- and photo-induced hyperon production
A.V. Anisovich ; E. Klempt ; V.A. Nikonov ; A.V. Sarantsev ; U. Thoma ;
Date 24 Sep 2010
AbstractWe report evidence for $N(1710)P_{11}$, $N(1875)P_{11}$, $N(1900)P_{13}$, $Delta(1600)P_{33}$, $Delta(1910)P_{31}$, and $Delta(1920)P_{33}$, and find indications that $N(1900)P_{13}$ might have a companion state at 1970,MeV. The controversial $Delta(1750)P_{31}$ 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 $pi N$ scattering amplitudes from either KH84 or GWU. The two $pi N$ amplitudes from KH84 or GWU, respectively, lead to slightly different $pi N$ branching ratios of contributing resonances but the debated resonances are required in both series of fits.
Source arXiv, 1009.4803
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