Structure of Λ (1405) and threshold behavior of πΣ scattering

Yoichi Ikeda; Tetsuo Hyodo; Daisuke Jido; Hiroyuki Kamano; Toru Sato; Koichi Yazaki

doi:10.1143/PTP.125.1205

Structure of Λ (1405) and threshold behavior of πΣ scattering

Yoichi Ikeda, Tetsuo Hyodo, Daisuke Jido, Hiroyuki Kamano, Toru Sato, Koichi Yazaki

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

The scattering length and effective range of the πΣ channel are studied in order to characterize the strangeness S = - 1 meson-baryon scattering and the Λ (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 K̄N threshold. We find that the πΣ threshold parameters are important to the structure of the Λ (1405) resonance and provide further constraints on the subthreshold extrapolation of the K̄N interaction.

Original language	English
Pages (from-to)	1205-1224
Number of pages	20
Journal	Progress of Theoretical Physics
Volume	125
Issue number	6
DOIs	https://doi.org/10.1143/PTP.125.1205
Publication status	Published - Jun 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1143/PTP.125.1205

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abstract = "The scattering length and effective range of the πΣ channel are studied in order to characterize the strangeness S = - 1 meson-baryon scattering and the Λ (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 {\=K}N threshold. We find that the πΣ threshold parameters are important to the structure of the Λ (1405) resonance and provide further constraints on the subthreshold extrapolation of the {\=K}N interaction.",

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AU - Ikeda, Yoichi

AU - Hyodo, Tetsuo

AU - Jido, Daisuke

AU - Kamano, Hiroyuki

AU - Sato, Toru

AU - Yazaki, Koichi

PY - 2011/6

Y1 - 2011/6

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AB - The scattering length and effective range of the πΣ channel are studied in order to characterize the strangeness S = - 1 meson-baryon scattering and the Λ (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 K̄N threshold. We find that the πΣ threshold parameters are important to the structure of the Λ (1405) resonance and provide further constraints on the subthreshold extrapolation of the K̄N interaction.

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Structure of Λ (1405) and threshold behavior of πΣ scattering

Abstract

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