Radiative decay of the Lambda(1520)

Abstract

A recently developed non-perturbative chiral approach to dynamically generate the (3/2^-) baryon resonances has been extended to investigate the radiative decays Lambda^*(1520) --> gamma Lambda(1116) and Lambda^*(1520) --> gamma Sigma^0(1193). We show that the Lambda^*(1520) decay into gamma Lambda is an ideal test for the need of extra components of the resonance beyond those provided by the chiral approach since the largest meson-baryon components give no contribution to this decay. The case is different for gamma Sigma decay where the theory agrees with experiment, though the large uncertainties of these data call for more precise measurements.

15 pages, 6 figures

References in corpus (33)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited
• Non perturbative chiral approach to s-wave \bar{K}N interactions
• N/D Description of Two Meson Amplitudes and Chiral Symmetry
• Relativistic chiral SU(3) symmetry, large N_c sum rules and meson-baryon scattering
• The 1/N Expansion for Baryons
• SU(3) Chiral Dynamics with Coupled Channels: Eta and Kaon Photoproduction
• Chiral Dynamics and the $S_{11}(1535)$ Nucleon Resonance
• On the nature of light scalar mesons from their large $N_c$ behavior
• On baryon resonances and chiral symmetry
• Baryonic Resonances from Baryon Decuplet-Meson Octet Interaction
• Algebraic Models of Hadron Structure II. Strange Baryons
• Strong and Electromagnetic Decays of the Baryon Decuplet
• Masses of the 70- Baryons in Large Nc QCD
• Chiral unitary meson-baryon dynamics in the presence of resonances: Elastic pion-nucleon scattering
• Phi decay in nuclei
• Chiral dynamics in the gamma p --> pi^0 eta p and gamma p --> pi^0 K^0 Sigma^+ reactions
• Unitary coupled channel analysis of the $\Lambda (1520)$ resonance
• New Relations for Excited Baryons in Large N_c QCD
• Chiral Unitary Approach To The N*N*pi, N*N*eta Couplings For The N*(1535) Resonance
• Chiral dynamics of p-wave in K^- p and coupled states
• Helicity amplitudes and electromagnetic decays of hyperon resonances
• Radiative decays of the Sigma0(1385) and Lambda(1520) hyperons
• Gauge invariance in two-particle scattering
• Compatibility of Quark and Resonant Picture Excited Baryon Multiplets in 1/N_c
• Electric and magnetic form factors of strange baryons
• Chiral coupled channel dynamics of the Lambda(1520) and the K-P -> pi0 pi0 Lambda reaction
• Coupling of \bar K*N to the Lambda(1520)
• Electromagnetic Decays of Hyperons (II)
• Unitarity and the Bethe-Salpeter Equation
• The equivalence theorem and the Bethe-Salpeter equation
• Measurement of the radiative decay width Γ[Λ(1520) --> Λγ] with the SPHINX spectrometer
• Mesonic cloud contribution to the nucleon and delta masses

Cited by in corpus (24)

• Dynamically generated resonances from the vector octet-baryon octet interaction
• Coupled-channel dynamics in the reactions piN --> piN, etaN, KLambda, KSigma
• Hidden gauge formalism for the radiative decays of axial-vector mesons
• The s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry
• Three body resonances in two meson-one baryon systems
• Photocouplings at the Pole from Pion Photoproduction
• Transition form factors of the N*(1535) as a dynamically generated resonance
• The phase and pole structure of the N*(1535) in piN-->piN and gammaN-->piN
• Molecular picture for the $\Omega (2012)$ revisited
• The radiative decay of the $\Lambda (1405)$ and its two-pole structure
• Re-analysis of the $\Lambda (1520)$ photoproduction reaction
• Radiative decay of the Delta(1700)
• Helicity Amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances
• Role of the $N^{\ast }$(1535) in the $J/\psi \to \bar{p}\eta p$ and $J/\psi \to \bar{p}{K}^{+}\Lambda$ reactions
• Radiative decays of dynamically generated charmed baryons
• Antineutrino induced antikaon production off the nucleon
• Magnetic moments of the low-lying $J^P=1/2^{-}$, $3/2^{-}$ $\Lambda$ resonances within the framework of the chiral quark model
• The composite nature of the $\Lambda (1520)$ resonance
• How and when can one identify hadronic molecules in the baryon spectrum
• Radiative decay into $\gamma P$ of the low lying axial-vector mesons
• The baryon-decuplet in the chiral dynamics of Lambda-hyperons in nuclear matter
• 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
• Radiative decay into gamma-baryon of dynamically generated resonances from the vector-baryon interaction
• Resonances in chiral unitary approaches