The European Physical Journal A

, 42:257

Kaonic production of \( \Lambda\)(1405) off deuteron target in chiral dynamics

Authors

    • Yukawa Institute for Theoretical PhysicsKyoto University
  • E. Oset
    • Departamento de Física Teórica and IFICCentro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna
  • T. Sekihara
    • Department of Physics, Graduate School of ScienceKyoto University
Regular Article - Theoretical Physics

DOI: 10.1140/epja/i2009-10875-5

Cite this article as:
Jido, D., Oset, E. & Sekihara, T. Eur. Phys. J. A (2009) 42: 257. doi:10.1140/epja/i2009-10875-5

Abstract

The K--induced production of \( \Lambda\)(1405) is investigated in K - d \( \rightarrow\) \( \pi\) \( \Sigma\) n reactions based on coupled-channels chiral dynamics, in order to discuss the resonance position of the \( \Lambda\)(1405) in the \( \bar{{K}}\) N channel. We find that the K - d \( \rightarrow\) \( \Lambda\)(1405)n process favors the production of \( \Lambda\)(1405) initiated by the \( \bar{{K}}\) N channel. The present approach indicates that the \( \Lambda\)(1405) -resonance position is 1420MeV rather than 1405MeV in the \( \pi\) \( \Sigma\) invariant-mass spectra of K - d \( \rightarrow\) \( \pi\) \( \Sigma\) n reactions. This is consistent with an observed spectrum of the K - d \( \rightarrow\) \( \pi^{{+}}_{}\) \( \Sigma^{{-}}_{}\) n with 686-844MeV/c incident K- by bubble chamber experiments done in the 70s. Our model also reproduces the measured \( \Lambda\)(1405) production cross-section.

PACS

14.20.Jn Hyperons 25.80.Nv Kaon-induced reactions 13.75.Jz Kaon-baryon interactions 12.39.Fe Chiral Lagrangians

Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2009