[Lambda](1405) and meson-baryon interactions in a quark model

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.2831· OSTI ID:5015877

Arima, M; Matsui, S; Shimizu, K ^[1]

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1. Department of Physics, Sophia University, Tokyo 102 (Japan)

We investigate the mass spectra of [ital p]-wave [Lambda]'s by means of the constituent quark model with the effect of coupling to meson-baryon channels. The quark wave function of the lowest [ital p]-wave [Lambda][sup *], i.e., [Lambda](1405), is found to be dominated by the antisymmetric flavor state which strongly couples to the [ital [bar K]N] and [pi][Sigma] channels. The significant downward shift of the [Lambda](1405)'s mass is attributed to its large attractive self-energy due to the [ital [bar K]N][Lambda][sup *] and [pi][Sigma][Lambda][sup *] coupling and its strong increase due to the presence of the cusp around the [ital [bar K]N] threshold.

• OSTI ID: 5015877
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:5; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
KAONS
LAMBDA BARYONS
LAMBDA-1405 BARYONS
MASS SPECTRA
MATHEMATICAL MODELS
MESON-BARYON INTERACTIONS
MESONS
P WAVES
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE MODELS
PSEUDOSCALAR MESONS
QUARK MODEL
SIGMA BARYONS
SPECTRA
STRANGE MESONS
STRANGE PARTICLES