Single-pole Nature of the Detectable Lambda(1405)
- Resource Type
- Authors
- Toshimitsu Yamazaki; Khin Swe Myint; Maryam Hassanvand; Yoshinori Akaishi
- Source
- Subject
- Physics
Nuclear Theory
010308 nuclear & particles physics
General Physics and Astronomy
Sigma
FOS: Physical sciences
Observable
Lambda
01 natural sciences
Spectral line
Nuclear Theory (nucl-th)
Amplitude
Chiral model
0103 physical sciences
Mass spectrum
010306 general physics
Nuclear theory
Mathematical physics
- Language
We have investigated the single-pole nature of the detectable Lambda(1405) in detail, by employing a chiral model having double poles of a KbarN-piSigma coupled channel T-matrix. The effects of the 1st pole and the 2nd pole on the observed piSigma mass spectrum in the Lambda(1405) region were analyzed separately by means of the Generalized Optical Potential. It is concluded that the 1st pole is responsible for both peak structures seen in the T(piSigma leftarrow KbarN)(T(21)) and T(piSigma leftarrow piSigma)(T(22)) invariant-mass spectra, and the 2nd pole due to an energy-dependent chiral interaction provides continuum amplitudes affecting the shape of peak structures in experimentally observable spectrum of the Lambda(1405).
Comment: 8 pages, 10 figures