Lambda-Sigma^0 mixing in finite nuclei

Abstract

Properties of hypernuclei are studied in the context of a chiral Lagrangian which successfully describes ordinary nuclei. Lambda-Sigma^0 mixing arises from nondiagonal vertices in flavor space induced by the vector mesons and by the electromagnetic field. The set of Dirac equations for the coupled hyperon system is discussed. Results are presented for energy spectra and electromagnetic properties of hyperons in the nuclear environment. Simple estimates suggest that flavor mixing can lead to sizable changes in the lifetimes of Lambda hypernuclei.

RevTex, 14 pages, 9 figures

References in corpus (5)

• Recent Progress in Quantum Hadrodynamics
• Nuclei in a chiral SU(3) model
• Chiral Lagrangian for strange hadronic matter
• Baryon magnetic moments in chiral perturbation theory
• Effective field theory for lambda-sigma^0 mixing in nuclear matter

Cited by in corpus (6)

• Measurement of hyper triton lifetime in Au + Au collisions at the Relativistic Heavy-Ion Collider
• Chiral SU(3) dynamics and $\Lambda$-hyperons in the nuclear medium
• Possibility of ΛΛpairing and its dependence on background density in relativistic Hartree-Bogoliubov model
• Recalibration of the binding energy of hypernuclei measured in emulsion experiments and its implications
• Contribution of the rho meson and quark sub-structure to the nuclear spin-orbit potential
• Strangeness-changing response functions:an alternative approach to hypernuclear structure