Meson–baryon scattering in resummed baryon chiral perturbation theory using time-ordered perturbation theory
| Autor: | Xiu-Lei Ren, Evgeny Epelbaum, Ulf-G. Meißner, Jambul Gegelia |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Chiral perturbation theory Physics and Astronomy (miscellaneous) Meson Nuclear Theory Scattering High Energy Physics::Phenomenology FOS: Physical sciences lcsh:Astrophysics Integral equation Scattering amplitude Baryon Nuclear Theory (nucl-th) Formalism (philosophy of mathematics) High Energy Physics - Phenomenology Amplitude High Energy Physics - Phenomenology (hep-ph) lcsh:QB460-466 lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ddc:530 Nuclear Experiment Engineering (miscellaneous) Mathematical physics |
| Zdroj: | The European physical journal / C 80(5), 406 (2020). doi:10.1140/epjc/s10052-020-7991-x European Physical Journal European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-9 (2020) |
| Popis: | Integral equations for meson-baryon scattering amplitudes are obtained by utilizing time-ordered perturbation theory for a manifestly Lorentz-invariant formulation of baryon chiral perturbation theory. Effective potentials are defined as sums of two-particle irreducible contributions of time-ordered diagrams and the scattering amplitudes are obtained as solutions of integral equations. Ultraviolet renormalizability is achieved by solving integral equations for the leading order amplitude and including higher order corrections perturbatively. As an application of the developed formalism, pion-nucleon scattering is considered. 15 pages, 2 figures |
| Databáze: | OpenAIRE |
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