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arXiv · hep-ph/0405128

Propagators of light scalar mesons

N. N. Achasov·A. V. Kiselev
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Abstract

For the first time, as far as we know, in field theory are found explicit forms of propagators satisfying the Källen -- Lehmann representation. To be exact, it is shown that scalar meson propagators, taking into account a virtual intermediate state contribution to the resonance self-energy, satisfy the Källen -- Lehmann representation in the wide domain of coupling constants of the light scalar mesons with the two-particle states. It is proposed to use these propagators in routine fitting data about light scalar mesons to reveal physics underlying the light scalar mesons.

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N. N. Achasov, A. V. Kiselev. 2004-12-20. Propagators of light scalar mesons. https://doi.org/10.1103/physrevd.70.111901

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