The two Λ(1405) poles from photoproduction data
1 Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptdo. 22085, 46071 Valencia, Spain
2 Departamento de Física, Universidad de Murcia, E-30100 Murcia, Spain
Published online: 22 June 2015
We present results extracting the position of the two Λ(1405) poles from experimental photoproduction data measured recently at different energies in the γp → K+π0Σ0 and γp → K+π±Σ∓ reactions at Jefferson Lab. The analysis is done by means of a chiral dynamics motivated potential but with free parameters, which guarantees analyticity and unitarity in the solutions. With the best result we find the two Λ(1405) poles at about 1352 − 48i MeV and 1419 − 29i MeV.
© Owned by the authors, published by EDP Sciences, 2015
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