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Title: Evidence for two {lambda}(1405) resonance states

Abstract

The K-p {yields} {pi}0{pi}0{sigma}0 reaction is studied within a chiral unitary model. The distribution of {pi}0{sigma}0 states forming the {lambda}(1405) shows, in agreement with a recent experiment, a peak at 1420 MeV and a relatively narrow width of {gamma} = 38 MeV. We use these data in combination with those of the {pi}-p {yields} K0{pi}{sigma} reaction and elements of chiral unitary theory to prove that there are two {lambda}(1405) states instead of one as so far assumed.

Authors:
;  [1];  [2];  [3]
  1. Departamento de Fisica Teorica, Institutos de Investigacion de Paterna -- Universidad de Valencia-CSIC, Apdo. correos 22085, 46071, Valencia (Spain)
  2. (Spain)
  3. Departament d'Estructura i Constituents de la Materia, Universitat de Barcelona, Diagonal 647, 08028 Barcelona (Spain)
Publication Date:
OSTI Identifier:
20798078
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 814; Journal Issue: 1; Conference: 11. international conference on hadron spectroscopy, Rio de Janeiro (Brazil), 21-26 Aug 2005; Other Information: DOI: 10.1063/1.2176491; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHIRALITY; DISTRIBUTION; ENERGY LEVELS; KAON-PROTON INTERACTIONS; LAMBDA-1405 BARYONS; MEV RANGE; PARTICLE PRODUCTION; PARTICLE WIDTHS; PIONS; RESONANCE PARTICLES; SIGMA BARYONS

Citation Formats

Oset, E., Magas, V. K., IFIC, Centro Mixto, Institutos de Investigacion de Paterna -- Universidad de Valencia-CSIC, Apdo. correos 22085, 46071, Valencia, and Ramos, A. Evidence for two {lambda}(1405) resonance states. United States: N. p., 2006. Web. doi:10.1063/1.2176491.
Oset, E., Magas, V. K., IFIC, Centro Mixto, Institutos de Investigacion de Paterna -- Universidad de Valencia-CSIC, Apdo. correos 22085, 46071, Valencia, & Ramos, A. Evidence for two {lambda}(1405) resonance states. United States. doi:10.1063/1.2176491.
Oset, E., Magas, V. K., IFIC, Centro Mixto, Institutos de Investigacion de Paterna -- Universidad de Valencia-CSIC, Apdo. correos 22085, 46071, Valencia, and Ramos, A. Sat . "Evidence for two {lambda}(1405) resonance states". United States. doi:10.1063/1.2176491.
@article{osti_20798078,
title = {Evidence for two {lambda}(1405) resonance states},
author = {Oset, E. and Magas, V. K. and IFIC, Centro Mixto, Institutos de Investigacion de Paterna -- Universidad de Valencia-CSIC, Apdo. correos 22085, 46071, Valencia and Ramos, A.},
abstractNote = {The K-p {yields} {pi}0{pi}0{sigma}0 reaction is studied within a chiral unitary model. The distribution of {pi}0{sigma}0 states forming the {lambda}(1405) shows, in agreement with a recent experiment, a peak at 1420 MeV and a relatively narrow width of {gamma} = 38 MeV. We use these data in combination with those of the {pi}-p {yields} K0{pi}{sigma} reaction and elements of chiral unitary theory to prove that there are two {lambda}(1405) states instead of one as so far assumed.},
doi = {10.1063/1.2176491},
journal = {AIP Conference Proceedings},
number = 1,
volume = 814,
place = {United States},
year = {Sat Feb 11 00:00:00 EST 2006},
month = {Sat Feb 11 00:00:00 EST 2006}
}