Non-perturbative solution of metastable scalar models

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F03%3A00030414" target="_blank" >RIV/61389005:_____/03:00030414 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Non-perturbative solution of metastable scalar models
Original language description
Dyson-Schwinger equations (DSEs) for propagators are solved for the scalar Phi(3) theory and massive Wick-Cutkosky model. With the help of integral representation, the results are obtained directly in Minkowski space in and beyond bare vertex approximation. Various renormalization schemes are employed which differ by the finite strength field renormalization function Z. The S-matrix is puzzled from the Green's function and the effect of truncation of the DSEs is studied. Independent of the approximation, the numerical solution breaks down for a certain critical value of the coupling constant, for which the on-shell renormalized propagator starts to develop the unphysical singularity at very high space-like square of momenta.
Czech name
Neporuchové řešení metastabilních skalárních modelů
Czech description
Výpočet progagátoru v skalárních teoriích pomocí neporuchových metod.

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BE - Theoretical physics
OECD FORD branch
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Project
<a href="/en/project/GA202%2F03%2F0210" target="_blank" >GA202/03/0210: Few-nucleon systems and electroweak interactions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2003
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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