On a subtle point of sum rules calculations: toy model

Details On a subtle point of sum rules calculations: toy model On a subtle point of sum rules calculations: toy model

1995-03-30

arxiv.org/abs/hep-ph/9503470v1

Phys.Lett. B357 (1995) 427-430

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX file

Scientific paper

10.1016/0370-2693(95)00928-E

We consider a two-point correlator in massless $\phi^3$ model within the ladder approximation . The spectral density of the correlator is known explicitly and does not contain any resonances. Meanwhile making use of the standard sum rules technique with a simple "resonance + continuum" model of the spectrum allows to predict parameters of the "resonance" very accurately in the sense that all necessary criteria of stability are perfectly satisfied.

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