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Resonances from Higher Order S-Matrix Poles with Exponential Decay

C. Puntmann, P. Patuleanu

quant-pharXiv:quant-ph/9705012

Abstract

In analogy to Gamow vectors describing resonance states from first order S-matrix poles, one can define Gamow vectors from higher order poles of the S-matrix. With these vectors we are going to discuss a density operator that describes exponentially decaying resonances from higher order poles.

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