Detailed Analysis of the Chiral Unitary Model for Meson-Baryon Scattering with Flavor SU(3) Breaking Effects

Abstract

We study s-wave meson-baryon scattering using the chiral unitary model. We consider $1/2^{-}$ baryon resonances as quasibound states of the low lying mesons ($\pi ,K,\eta$) and baryons ($N,\Lambda ,\Sigma ,\Xi$). In previous works, the subtraction constants which appear in loop integrals were found to largely depend on the channels, and it was necessary to fit these constants to reproduce the data. In order to extend this model to all channels with fewer parameters, we introduce flavor SU(3) breaking interactions in the framework of chiral perturbation theory. It is found, however, that the observed SU(3) breaking in meson-baryon scattering cannot be explained by the present SU(3) breaking interactions. The role and importance of the subtraction constants in the present framework are discussed.

PTPTeX, 26 pages, 13 figures, 15 tables, final version to appear in Prog. Theor. Phys

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Cited by in corpus (43)

• The nature of the Lambda(1405) resonance in chiral dynamics
• Effective Kbar N interaction based on chiral SU(3) dynamics
• Variational calculation of the ppK^- system based on chiral SU(3) dynamics
• Origin of resonances in the chiral unitary approach
• Comprehensive analysis of the wave function of a hadronic resonance and its compositeness
• K anti-K N molecule state with I=1/2 and J^P=1/2^+ studied with three-body calculation
• Exotic baryons from a heavy meson and a nucleon -- Negative parity states --
• Lambda(1405) poles obtained from pi0-Sigma0 photoproduction data
• Predictions for the ${\Lambda }_b\to J/\psi \Lambda (1405)$ decay
• anti-K anti-K N molecule state in three-body calculation
• Structure of the $\mathbf{\Lambda }(1405)$ from Hamiltonian effective field theory
• Structure of Lambda(1405) and construction of KbarN local potential based on chiral SU(3) dynamics
• Internal structure of resonant Lambda(1405) state in chiral dynamics
• Study of exotic hadrons in S-wave scatterings induced by chiral interaction in the flavor symmetric limit
• $K\Lambda (1405)$ configuration of the $K\bar{K}N$ system
• On the nature of the $\Lambda (1405)$ and $\Lambda (1670)$ from their $N_c$ behavior in chiral dynamics
• Compositeness of baryonic resonances: Applications to the Delta(1232), N(1535), and N(1650) resonances
• Lambda(1405)-induced non-mesonic decay in kaonic nuclei
• Construction of a local barK N-pi Sigma-pi Lambda potential and composition of the Lambda(1405)
• Theoretical support for the $\pi (1300)$ and the recently claimed $f_0(1790)$ as molecular resonances
• Light-quark contributions to the magnetic form factor of the Lambda(1405)
• Helicity Amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances
• Kaon induced Lambda(1405) production on a deuteron target at DAFNE
• The Lambda* N interaction and two-body bound state based on chiral dynamics
• The $K^{-}p\to {\Sigma }^0{\pi }^0$ reaction at low energies in a chiral quark model
• Production of hyperon resonances induced by kaon on a deuteron target
• Formation spectra of light kaonic nuclei by in-flight ($\bar{K},N$) reactions with chiral unitary amplitude
• Predicting the existence of a 2.9 GeV $D{f}_0(980)$ molecular state
• Low energy reactions $K^{-}p\to {\Sigma }^0{\pi }^0$, $\Lambda {\pi }^0$, ${\bar{K}}^{0}n$ and the strangeness $S=-1$ hyperons
• Double-pole nature of $\Lambda (1405)$ studied with coupled-channel complex scaling method using complex-range Gaussian basis
• The negative-parity spin-1/2 $\Lambda$ baryon spectrum from lattice QCD and effective theory
• Structure of the $\mathbf{\Lambda }(1670)$ resonance
• Low energy reaction $K^{-}p\to \Lambda \eta$ and the negative parity $\Lambda$ resonances
• Combined analysis of the ${\pi }^{-}p\to K^0\Lambda$, $\eta n$ reactions in a chiral quark model
• Investigation of $qqqs\bar{q}$ pentaquarks in a chiral quark model
• Spectral function of the ${\eta }^{\prime }$ meson in nuclear medium based on phenomenological models
• Meson-baryon nature of Lambda(1405) in chiral dynamics
• Singlet baryons in the graded symmetry approach to partially quenched QCD
• Chiral SU(3) dynamics and the quasibound K^-pp cluster
• $K^{-}d\to \pi \Lambda N$ reaction for studying charge symmetry breaking in the $\Lambda N$ interaction
• A new N* resonance as a hadronic molecular state
• $K^{-}d\to \pi \Lambda N$ reaction with in-flight kaons for studying the $\Lambda N$ interaction
• Effective Kbar N interaction with strong pi Sigma dynamics constrained by chiral SU(3) symmetry