4 Propagators of light scalar mesons
نویسندگان
چکیده
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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ar X iv : h ep - p h / 04 05 12 8 v 1 1 4 M ay 2 00 4 Propagators of light scalar mesons
It is shown that the light scalar meson propagators in the one-loop approximation 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.
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