On baryon resonances and chiral symmetry

Abstract

We study J^P=(3/2)^- baryon resonances as generated by chiral coupled-channel dynamics. Parameter free results are obtained in terms of the Weinberg-Tomozawa term predicting the leading s-wave interaction strength of Goldstone bosons with baryon-decuplet states. In the 'heavy' SU(3) limit with m_π= m_K \sim 500 MeV the resonances turn into bound states forming a decuplet and octet representation of the SU(3) group. Using physical masses the mass splitting are remarkably close to the empirical pattern.

arXiv commentrevised version: includes two additional references, gives improved discussions and eliminted some misprints

References in corpus (9)

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• Relativistic chiral SU(3) symmetry, large N_c sum rules and meson-baryon scattering
• Low lying S=-1 excited baryons and chiral symmetry
• Quark mass dependence of s-wave baryon resonances
• $S=-1$ Meson-Baryon Unitarized Coupled Channel Chiral Perturbation Theory and the $S_{01}-$ $\Lambda$(1405) and $-\Lambda$(1670) Resonances
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Cited by in corpus (142)

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• Electroexcitation of nucleon resonances
• Dynamically generated resonances from the vector octet-baryon octet interaction
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• Towards a theory of hadron resonances
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• SU(6) Extension of the Weinberg-Tomozawa Meson-Baryon Lagrangian
• Photocouplings at the Pole from Pion Photoproduction
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• Effects of pseudoscalar-baryon channels in the dynamically generated vector-baryon resonances
• PANDA Phase One
• On the cross section ratio sigma_n/sigma_p in eta photoproduction
• Anomaly in the K^0_S Sigma^+ photoproduction cross section off the proton at the K* threshold
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• Pion photoproduction in a dynamical coupled-channels model
• Baryon resonances from chiral coupled-channel dynamics
• Dynamically generated resonances from the vector octet-baryon decuplet interaction
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• Photon induced Lambda(1520) production and the role of the K^* exchange
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• Detailed Analysis of the Chiral Unitary Model for Meson-Baryon Scattering with Flavor SU(3) Breaking Effects
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• Information on the structure of the a1 from tau decay
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• Formation of eta-mesic nuclei by (pi,N) reaction and N^*(1535) in medium
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• First Measurement of the Polarization Observable E in the $\vec{p}(\vec{\gamma },{\pi }^{+})n$ Reaction up to 2.25 GeV
• Molecular picture for the $\Omega (2012)$ revisited
• Gauge invariance in two-particle scattering
• Large Nc Weinberg-Tomozawa interaction and negative parity s--wave baryon resonances
• Clues to the nature of the Delta^*(1700) resonance from pion- and photon-induced reactions
• Singularity structure of the pi N scattering amplitude in a meson-exchange model up to energies W < 2.0 GeV
• Mixing of pseudoscalar-baryon and vector-baryon in the $J^P=1/2^{-}$ sector and the $N^{\ast }$(1535) and $N^{\ast }$(1650) resonances
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• $\Omega (2012)$ through the looking glass of flavour SU(3)
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• Helicity Amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances
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• New data on $\vec{\gamma }\vec{p}\to \eta p$ with polarized photons and protons and their implications for $N^{\ast }\to N\eta$ decays
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• Coupling of \bar K*N to the Lambda(1520)
• Can $\Omega (2012)$ be explained as a molecular state?
• Strong decays of the hadronic molecule ${\Omega }^{\ast }(2012)$
• Study on N Omega-bar systems in a chiral quark model
• Pion-nucleon charge-exchange amplitudes above 2 GeV
• Delta K, Lambda K, and Sigma K states in the extended chiral SU(3) quark model
• The rho meson in a scenario of pure chiral restoration
• Tau decay and the structure of the a1
• The composite nature of the $\Lambda (1520)$ resonance
• Observation of a cusp-like structure in the $\gamma p\to K^{+}{\Sigma }^0$ cross section at forward angles and low momentum transfer
• Are there three Xi(1950) states?
• Testing the nature of the $\Lambda (1520)$ resonance in proton-induced production
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• On kinematical constraints in the hadrogenesis conjecture for the baryon resonance spectrum
• On coupled-channel dynamics in the presence of anomalous thresholds
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• The chiral Lagrangian with three flavors and large-Nc sum rules
• Dynamically generated hidden-charm baryon resonances
• Testing the nature of the $\Lambda$(1520) in the $J/\psi \to \bar{\Lambda }{K}^{-}p$ and $J/\psi \to \bar{\Lambda }{\pi }^{+}{\pi }^{-}\Lambda$ reactions
• Dynamically generated resonances
• Quark-mass dependence of baryon resonances
• Radiative decays of the $\Omega (2012)$ as a hadronic molecule
• Baryonic Resonances from Baryon Decuplet-Meson Octet Interactions and the Exotic Resonance S=1, I=1, J^P=3/2-
• Electromagnetic form factors of hyperons in a relativistic quark model
• Interactions of the Pseudoscalar Meson Octet and the Baryon Decuplet in the Continuum and a Finite Volume
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• Recent developments in chiral dynamics of hadrons and hadrons in a nuclear medium
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• Selected topics on Hadrons in Nuclei
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• Charming Baryons
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