Low energy K̄N interaction in nuclear matter

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Abstract

We investigate the low-energy K̄N interaction in nuclear matter including Pauli blocking, Fermi motion and binding effects. We use a coupled-channel approach based on the Chiral SU(3) Effective Lagrangian which describes all available low energy data of the coupled K̄N, Π∑, ΠΛ system. Due to the dynamics of the Λ(1405) resonance we find a strong non-linear density dependence of the K-p scattering amplitude in nuclear matter. The real part of the K-p scattering length changes sign already at a small fraction of nuclear matter density, less than 0.2 ρ0. This may explain the striking behaviour of the K- -nuclear optical potential found in the analysis of kaonic atom data.

Original languageEnglish
Pages (from-to)12-16
Number of pages5
JournalPhysics Letters B
Volume365
Issue number1-4
DOIs
StatePublished - 4 Jan 1996

Keywords

  • Density dependence of K-nuclear optical potential
  • Kaonic atoms
  • Low energy K̄N interaction
  • Pauli blocking effect on the Λ(1405) resonance
  • SU(3) Chiral Lagrangian

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