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Sign ambiguity in the channel

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Abstract

Ambiguities of the signs of NΣK coupling constants are studied in a multichannel partial wave analysis of a large body of pion- and photo-induced reactions. It is shown that the signs are not free from some ambiguities, and further experimental data are needed. Data on the reactions π + pΣ + K + and γpK + Σ 0 define rather well the isospin 3/2 contributions to these channels. However the lack of information on polarization observables for the reactions π pΣ 0 K 0, π pΣ K + and γpK 0 Σ + does not allow us to fix uniquely the signs of NΣK coupling constants. As a consequence, also the contributions of nucleon resonances to these channels remain uncertain.

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Correspondence to E. Klempt.

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Communicated by M. Anselmino

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Anisovich, A.V., Klempt, E., Nikonov, V.A. et al. Sign ambiguity in the channel. Eur. Phys. J. A 49, 158 (2013). https://doi.org/10.1140/epja/i2013-13158-8

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  • DOI: https://doi.org/10.1140/epja/i2013-13158-8

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