instanton-induced processes in scalar model
نویسنده
چکیده
The cross section of the multiparticle scattering processes in the non-perturbative sector of the scalar (−λ)φ4 model is studied within the semiclassical approximation. For this purpose the exact formula for the residue of the propagator in the instanton background is derived. The exponent of the cross section is calculated at small energies both analytically and numerically in the leading and next-to-leading orders in energy. The results are in agreement with the numerical result of Ref. [1].
منابع مشابه
Instanton propagator and instanton induced processes in scalar model
The propagator in the instanton background in the (−λφ4) scalar model in four dimensions is studied. Leading and sub-leading terms of its asymptotics for large momenta and its on-shell double residue are calculated analytically. These results are applied to the analysis of the initial-state and initial-final-state corrections and the calculation of the next-to-leading (propagator) correction to...
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تاریخ انتشار 1998