The European Physical Journal A

, Volume 35, Issue 3, pp 281–285 | Cite as

Analysis of the Δ -resonance in a finite volume

  • V. Bernard
  • M. Lage
  • U. -G. Meißner
  • A. Rusetsky
Regular Article - Theoretical Physics

Abstract.

We discuss Lüscher's approach for the extraction of the Δ -resonance parameters from lattice QCD data. Within this approach, we propose a novel strategy to analyze the data corresponding to the finite volume energy spectrum. By using the new method, it is further demonstrated that Lüscher's approach allows one to determine the mass and width of the Δ at a reasonable accuracy, despite the fact that the “avoided level crossing” in the energy spectrum has been washed out due to the large width of the resonance.

PACS.

12.38.Gc Lattice QCD calculations 14.20.Gk Baryon resonances with S = 0  

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2008

Authors and Affiliations

  • V. Bernard
    • 1
  • M. Lage
    • 2
  • U. -G. Meißner
    • 2
    • 3
  • A. Rusetsky
    • 2
  1. 1.Laboratoire de Physique ThéoriqueUniversité Louis PasteurStrasbourgFrance
  2. 2.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie)Universität BonnBonnGermany
  3. 3.Institut für Kernphysik (Theorie)Forschungszentrum JülichJülichGermany

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