Structure of Lambda(1405) and threshold behavior of pi Sigma scattering
The scattering length and effective range of the pi-Sigma channel are studied in order to characterize the strangeness S = -1 meson-baryon scattering and the Lambda (1405) resonance. We examine various off-shell dependence of the amplitude in dynamical chiral models to evaluate the threshold quantities with the constraint at the KN threshold. We find that the pi-Sigma threshold parameters are important to the structure of the Lambda (1405) resonance and provide further constraints on the subthreshold extrapolation of the KN interaction.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1018943
- Report Number(s):
- JLAB-THY-11-1161; DOE/OR/23177-1414; arXiv:1101.5190
- Journal Information:
- Prog.Theor.Phys., Journal Name: Prog.Theor.Phys. Journal Issue: 6 Vol. 124
- Country of Publication:
- United States
- Language:
- English
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