Photon radiation in $$e^+e^-\;\rightarrow \;$$ e + e - → hadrons at low energies with carlomat_3.1
| Autor: | Karol Kolodziej, Fred Jegerlehner |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Feynman Diagram Particle physics Photon Annihilation Physics and Astronomy (miscellaneous) 010308 nuclear & particles physics Differential Cross Section Feynman Rule Monte Carlo method Hadron Form factor (quantum field theory) lcsh:Astrophysics 01 natural sciences Pion Form Factor 0103 physical sciences lcsh:QB460-466 lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Gauge theory 010306 general physics Engineering (miscellaneous) Monte Carlo Lepton |
| Zdroj: | European Physical Journal C: Particles and Fields, Vol 77, Iss 4, Pp 1-10 (2017) |
| ISSN: | 1434-6052 1434-6044 |
| Popis: | We present a sample of results for the cross sections of several processes of low energetic $$e^+e^-$$ e + e - annihilation into final states containing pions accompanied by one or two photons, or a light lepton pair. The results, which have been obtained with a new version of a multipurpose Monte Carlo program carlomat, labelled 3.1, demonstrate new capabilities of the program which, among others, include a possibility of taking into account either the initial or final state radiation separately, or both at a time, and a possibility of inclusion of the electromagnetic charged pion form factor for processes with charged pion pairs. We also discuss some problems related to the U(1) electromagnetic gauge invariance. |
| Databáze: | OpenAIRE |
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