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Title New insights into the pole parameters of the Lambda(1380), the Lambda(1405) and the Sigma(1385)
Authors Daniel Sadasivan, Maxim Mai, Michael Doring, Ulf-G. Meissner, Felipe Amorim, J. Klucik, Jun-Xu Lu, Li-Sheng Geng
JLAB number JLAB-THY-23-3745
LANL number (None)
Other number DOE/OR/23177-5691
Document Type(s) (Journal Article) 
Associated with EIC: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)

Compiled for arXiv
Publication Abstract: A coupled-channel S- and P-wave next-to-leading order chiral-unitary approach for strangeness S = ?1 meson-baryon scattering is extended to include the new data from the KLOE and AMADEUS experiments as well as the ?? mass distribution of the ?(1385). The positions of the poles on the second Riemann sheet corresponding to the ?(1385) pole and the ?(1380) and ?(1405) poles as well as the couplings of these states to various channels are calculated. We find that the resonance positions and branching ratios are on average determined with about 20% higher precision when including the KLOE and AMADEUS data. Additionally, for the first time, the correlations between the parameters of the poles are investigated and shown to be relevant. We also find that the ?(1385) has negligible influence on the properties of the ? states given the available data. Still, we identify isospin-1 cusp structures in the present solution in light of new measurements of ? ±? line-shapes by the Belle collaboration.
Experiment Numbers:
Document: pdf
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