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We extend the effective field theory approach which successfully describesordinary nuclei and nuclear matter to incorporate strangeness in nuclearstructure. Central object is a chiral effective Lagrangian involving the baryonoctet, the Goldstone boson octet, the vector meson octet and a light scalarsinglet. According to the rules of effective field theory, we include allinteraction terms (up to a given order of truncation) that are consistent withthe underlying symmetries of QCD. We develop a mean-field approximation andstudy nuclear matter as a simple model for multi-strange systems. A D-typeYukawa coupling between baryons and vector mesons leads to lambda-sigma^0flavor mixing in the nuclear medium. We study flavor oscillations in thenuclear matter ground state which are closely related to the phenomenon ofneutrino oscillations.Comment: 38 pages including 9 figure

physical review. c. nuclear physics/physical review. c, nuclear physics

Effective field theory for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Λ</mml:mi><mml:mo>−</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>Σ</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>mixing in nuclear matter

Effective field theory forΛ−Σ0mixing in nuclear matter