Published April 1, 2010 | Version v1
Journal article Metadata-only

The nature of Λ(1405) hyperon resonance in chiral dynamics

Creators

  • 1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
  • 2. Department of Physics, Graduate School of Science, Kyoto University, Kyoto, 606-8502 (Japan)
  • 3. Nishina Center for Accelerator-Based Science, Institute for Physical and Cemical Research (RIKEN), Wako, Saitama 351-0198 (Japan)
  • 4. Depertment of Physics, University of Tokyo, Tokyo 113-0033 (Japan)
  • 5. Department of Physics, Tokyo Institute of Technology, Meguro 152-8551 (Japan)
  • 6. Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Aptdo. 22085, 46071 Valencia (Spain)

Description

The nature of the Λ(1405) is discussed based on the unitarised coupled-channels approach with chiral dynamics (chiral unitary model). This approach describes the K-barN scattering cross sections and the Λ(1405) spectra phenomenologically very well. With this successful description of Λ(1405), it is found that the Λ(1405) is composed by two resonance states having different coupling nature to the meson-baryon states. As a consequence, the resonance position in the πΣ invariant mass spectrum depends on the initial channel of the Λ(1405) production. To observe the Λ(1405) initiated by the K-barN channel, K-d→Λ(1405)n is one of the most favorable reactions. Hadronic molecule states with kaons are also discussed by emphasizing an important role of Λ(1405) as a quasibound state of K-barN

Availability note (English)

Available from http://dx.doi.org/10.1016/j.nuclphysa.2010.01.175

Additional details

Identifiers

DOI
10.1016/j.nuclphysa.2010.01.175;
arXiv
arXiv:1003.4560v1;
PII
S0375-9474(10)00178-8;

Publishing Information

Journal Title
Nuclear Physics. A
Journal Volume
835
Journal Issue
1-4
Journal Page Range
p. 59-66
ISSN
0375-9474
CODEN
NUPABL

Conference

Title
10. international conference on hypernuclear and strange particle physics
Dates
14-18 Sep 2009
Place
Tokai (Japan)

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41069310
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CHIRALITY; COUPLED CHANNEL THEORY; COUPLING; CROSS SECTIONS; ENERGY LEVELS; KAONS MINUS; LAMBDA-1405 BARYONS; MASS SPECTRA; QUASIBOUND STATE; RESONANCE; SCATTERING
Descriptors DEC
BARYONS; BOSONS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HYPERONS; KAONS; LAMBDA BARYONS; MESONS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; SPECTRA; STRANGE MESONS; STRANGE PARTICLES

Optional Information

Copyright
Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.