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Article overview
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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 | Abstract: | We 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 | Services: | Forum | Review | PDF | Favorites |
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