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Journal of High Energy Physics

, 2012:23 | Cite as

Matrix elements of unstable states

  • V. Bernard
  • D. HojaEmail author
  • U.-G. Meißner
  • A. Rusetsky
Open Access
Article

Abstract

Using the language of non-relativistic effective Lagrangians, we formulate a systematic framework for the calculation of resonance matrix elements in lattice QCD. The generalization of the Lüscher-Lellouch formula for these matrix elements is derived. We further discuss in detail the procedure of the analytic continuation of the resonance matrix elements into the complex energy plane and investigate the infinite-volume limit.

Keywords

Lattice Quantum Field Theory Lattice Gauge Field Theories 

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Copyright information

© SISSA 2012

Authors and Affiliations

  • V. Bernard
    • 1
  • D. Hoja
    • 2
    Email author
  • U.-G. Meißner
    • 2
    • 3
  • A. Rusetsky
    • 2
  1. 1.Institut de Physique Nucléaire, CNRS/Univ. Paris-Sud 11 (UMR 8608)Orsay CedexFrance
  2. 2.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical PhysicsUniversität BonnBonnGermany
  3. 3.Forschungszentrum Jülich, Jülich Center for Hadron PhysicsInstitut für Kernphysik (IKP-3) and Institute for Advanced Simulation (IAS-4)JülichGermany

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