Study of Σ Resonances from K−N → πΛ Reactions

In order to know more about some Σ resonances and distinguish various models of hadron structures, an analysis is performed for the reactions K − n → π − Λ and K − p → π 0 Λ , using an effective Lagrangian approach. The differential cross sections and Λ polarizations from two experiments are analyze...

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Bibliographic Details
Published in:Few-body systems 2013-08, Vol.54 (7-10), p.1161-1165
Main Authors: Gao, Puze, Shi, Jun, Zou, B. S.
Format: Article
Language:English
Subjects:
Atomic
Hadrons
Heavy Ions
Molecular
Nuclear Physics
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
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Summary:In order to know more about some Σ resonances and distinguish various models of hadron structures, an analysis is performed for the reactions K − n → π − Λ and K − p → π 0 Λ , using an effective Lagrangian approach. The differential cross sections and Λ polarizations from two experiments are analyzed with the c.m. energy between 1,550 and 1,676 MeV. Our study strongly support the existence of a resonance with mass near 1,633 MeV and width about 120 MeV, which is compatible with the three-star in PDG. Meanwhile, no evidence is found for the two-star listed in PDG.
ISSN:0177-7963
1432-5411
DOI:10.1007/s00601-013-0607-3