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Matrix elements of unstable states

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.
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Submitted on : Monday, March 11, 2013 - 2:25:40 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:32 PM

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V. Bernard, D. Hoja, U.-G. Meißner, A. Rusetsky. Matrix elements of unstable states. Journal of High Energy Physics, Springer Verlag (Germany), 2012, 2012 (9), pp.023. ⟨10.1007/JHEP09(2012)023⟩. ⟨in2p3-00799046⟩



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