Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-05-04
Phys.Rev.C76:035204,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages and 7 figures
Scientific paper
10.1103/PhysRevC.76.035204
In order to describe Lambda(1405) as a resonance in the baryon-meson scattering, we have investigated q^3-q qbar scattering system with the flavor-singlet q^3 (0s)^2(0p) state (the Lambda^1 pole). The scattering is treated by the quark cluster model (QCM). The Lambda^1 pole is treated as a bound state embedded in the continuum. We found that the peak appears below the N Kbar threshold in the spin one half, isospin 0 channel even if the mass of the Lambda^1 pole is above the threshold. This peak disappears when the coupling to the Lambda^1 pole is switched off. To use the observed hadron mass in the kinetic part of QCM is also found to be important to reproduce a peak just below the N Kbar threshold.
Shimizu Kiyotaka
Takeuchi Sachiko
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