Effective field theory for lambda-sigma^0 mixing in nuclear matter

Abstract

We extend the effective field theory approach which successfully describes ordinary nuclei and nuclear matter to incorporate strangeness in nuclear structure. Central object is a chiral effective Lagrangian involving the baryon octet, the Goldstone boson octet, the vector meson octet and a light scalar singlet. According to the rules of effective field theory, we include all interaction terms (up to a given order of truncation) that are consistent with the underlying symmetries of QCD. We develop a mean-field approximation and study nuclear matter as a simple model for multi-strange systems. A D-type Yukawa coupling between baryons and vector mesons leads to lambda-sigma^0 flavor mixing in the nuclear medium. We study flavor oscillations in the nuclear matter ground state which are closely related to the phenomenon of neutrino oscillations.

38 pages including 9 figures

References in corpus (3)

• Recent Progress in Quantum Hadrodynamics
• Chiral Lagrangian for strange hadronic matter
• Baryon magnetic moments in chiral perturbation theory

Cited by in corpus (11)

• Neutron stars and quark phases in the NJL model
• Quantum Field Theory of three flavor neutrino mixing and oscillations with CP violation
• Density dependent hadron field theory for hypernuclei
• Remarks on the neutrino oscillation formula
• A study of Lambda hypernuclei within the Skyrme-Hartree-Fock Model
• Properties of a protoneutron star in the Effective Field Theory
• Possibility of ΛΛpairing and its dependence on background density in relativistic Hartree-Bogoliubov model
• Ground states and excited states of hypernuclei in Relativistic Mean Field approach
• Hot Hypernuclear Matter in the Modified Quark Meson Coupling Model
• Lambda-Sigma^0 mixing in finite nuclei
• Strangeness-changing response functions:an alternative approach to hypernuclear structure