The Lambda* N interaction and two-body bound state based on chiral dynamics

Abstract

The interaction of Lambda*=Lambda(1405) with a nucleon is studied from the viewpoint of chiral dynamics. We construct the coordinate space Lambda* N potential in the meson-exchange picture, which serves as a fundamental ingredient for the study of the few-body nuclear systems with a Lambda*, the Lambda*-hypernuclei. The coupling constants concerning Lambda* are determined based on the chiral unitary model picture for the meson-baryon scattering where Lambda* is described as a superposition of two resonance poles. Solving the coupled-channel two-body Lambda* N system, we find the higher energy Lambda* N state develops an s-wave quasi-bound state slightly below the threshold in the total spin S=0 channel, which acquires a finite width through the coupling to the lower energy Lambda* N channel. We show important roles of the Kbar exchange contribution to the Lambda* N potential.

41 pages, 10 figures; v2: minor changes, published version

References in corpus (21)

• The nature of the Lambda(1405) resonance in chiral dynamics
• Effective Kbar N interaction based on chiral SU(3) dynamics
• Faddeev calculation of a $K^{-}pp$ quasi-bound state
• Strange dibaryon resonance in the anti-KNN--piYN system
• Variational calculation of the ppK^- system based on chiral SU(3) dynamics
• Indication of a deeply bound compact K-pp state formed in the pp -> p Lambda K+ reaction at 2.85 GeV
• The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction
• $\bar{K}NN$ quasi-bound state and the $\bar{K}N$ interaction: coupled-channel Faddeev calculations of the $\bar{K}NN-\pi \Sigma N$ system
• Origin of resonances in the chiral unitary approach
• $K^{-}pp$ system with chiral SU(3) effective interaction
• Energy dependence of barKN interactions and resonance pole of strange dibaryons
• Resonance energy of the barKNN-piYN system
• The $\bar{K}NN$ system with chiral dynamics
• Internal structure of resonant Lambda(1405) state in chiral dynamics
• Search for strange tribaryon states in the inclusive ^4He(K^{-}_{stopped}, p) reaction
• Electromagnetic mean squared radii of Lambda(1405) in chiral dynamics
• Gluonium nature of the sigma/f_0(600) from its coupling to KK
• Lambda(1405)-induced non-mesonic decay in kaonic nuclei
• Structure of Lambda(1405) and threshold behavior of piSigma scattering
• Λ^{\ast}-hypernuclei in phenomenological nuclear forces
• Formation of the $S=-1$ resonance X(2265) in the reaction $pp->X+K^{+}$ at 2.50 and 2.85 GeV

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