Antikaons and hyperons in nuclear matter with saturation
نویسندگان
چکیده
We evaluate the antikaon and hyperon spectral functions in a self-consistent and covariant many-body approach. The computation is based on coupled-channel dynamics derived from the chiral SU(3) Lagrangian. A novel subtraction scheme is developed that avoids kinematical singularities and medium-induced power divergencies all together. Scalar and vector mean fields are used to model nuclear binding and saturation. The effect of the latter is striking for the antikaon spectral function that becomes significantly more narrow at small momenta. Attractive mass shifts of about 30 and 40 MeV are predicted for the Λ(1405) and Σ(1385) resonances. Once scalar and vector mean fields for the nucleon are switched on the Λ(1520) resonances dissolves almost completely in nuclear matter.
منابع مشابه
Self consistent propagation of hyperons and antikaons in nuclear matter based on relativistic chiral SU(3) dynamics
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