Propagators of light scalar mesons
May, 2004Citations per year
Abstract:
For the first time, as far as we know, in field theory are found explicit forms of propagators satisfying the Kallen -- 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 Kallen -- 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.- 12.39.Fe
- 11.55.Fv
- 11.10.St
- scalar meson: propagator
- spectral representation
- f0(980): hadronic decay
- a0(980): hadronic decay
- scalar meson: width
- sigma model: linear
- f0(980) --> 2pi
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