Final state interactions in nonleptonic hyperon decays

Abstract

We investigate the importance of final state interactions in weak nonleptonic hyperon decays within a relativistic chiral unitary approach based on coupled channels. The effective potentials for meson-baryon scattering are derived from a chiral effective Lagrangian and iterated in a Bethe-Salpeter equation, which generates the low lying baryon resonances dynamically. The inclusion of final state interactions decreases the discrepancy between theory and experiment for both s and p waves. Our study indicates that contributions from higher order terms of the weak effective Lagrangian may play an important role in these decays.

arXiv comment14 pages, 4 figures

References in corpus (15)

• Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited
• Non perturbative chiral approach to s-wave \bar{K}N interactions
• Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction
• SU(3) Chiral Dynamics with Coupled Channels: Eta and Kaon Photoproduction
• Chiral Dynamics and the $S_{11}(1535)$ Nucleon Resonance
• Chiral expansion of baryon masses and $\sigma$-terms
• Consistent Analysis of the Spin Content of the Nucleon
• Radiative decay of rho^0 and phi mesons in a chiral unitary approach
• Baryon axial currents
• The phi --> gamma K0 bar(K0) Decay
• Chiral SU(3) Dynamics with Coupled Channels: Inclusion of P-Wave Multipoles
• The pion-nucleon Sigma term is definitely large: results from a G.W.U. analysis of pion nucleon scattering data
• Eta, eta-prime photoproduction and electroproduction off nucleons
• The S-wave Λπphase shift is not large
• The role of resonances in non-leptonic hyperon decays

Cited by in corpus (6)

• Kaon Photoproduction and the $\Lambda$ Decay Parameter ${\alpha }_{-}$
• $\Lambda N\to NN$ weak interaction in effective field theory
• Testing SU(3) Flavor Symmetry in Semileptonic and Two-body Nonleptonic Decays of Hyperons
• An EFT for the weak $\Lambda N$ interaction
• Studying Two-body Nonleptonic Weak Decays of Hyperons with Topological Diagram Approach
• SU(3) Chiral Effective Field Theories -- A Status Report --