Improved fixed center approximation of the Faddeev equations for the (K)over-bar N N system with S=0

Creative Commons License

Bayar M., Oset E.

NUCLEAR PHYSICS A, cilt.883, ss.57-68, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 883
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.nuclphysa.2012.04.005
  • Dergi Adı: NUCLEAR PHYSICS A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.57-68
  • Anahtar Kelimeler: Fixed center approximation, (K)over-bar N N system, KAON-NUCLEON INTERACTIONS, MESON-BARYON SCATTERING, CHIRAL DYNAMICS, BOUND-STATES, RESONANCE, SYMMETRY, LENGTH
  • Kocaeli Üniversitesi Adresli: Evet

Özet

We extend the Fixed Center Approximation (FCA) to the Faddeev equations for the (K) over bar N N system with S = 0, including the charge exchange mechanisms in the (K) over bar rescattering which have been ignored in former works within the FCA. We obtain similar results to those found before, but the binding is reduced by 6 MeV. At the same time we also evaluate the explicit contribution the pi N Sigma intermediate state in the three body system and find that it produces and additional small decrease in the binding of about 3 MeV. The system appears bound by about 35 MeV and the width omitting two body absorption, is about 50 MeV. (C) 2012 Elsevier B.V. All rights reserved.