Role of multichannelππscattering in decays of bottomia
| Autor: | Thomas Gutsche, Miroslav Nagy, Robert Kamiński, P. Bydžovský, Valery E. Lyubovitskij, Yurii S. Surovtsev |
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| Přispěvatelé: | Томский государственный университет Физический факультет Кафедра квантовой теории поля, Томский государственный университет Физический факультет Научные подразделения ФФ |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Mass distribution Meson Scattering Isoscalar Nuclear Theory FOS: Physical sciences State (functional analysis) Pseudoscalar meson Spectral line Nuclear physics High Energy Physics - Phenomenology рассеяние High Energy Physics - Phenomenology (hep-ph) мезоны Pi High Energy Physics::Experiment боттомий Nuclear Experiment |
| Zdroj: | Physical Review D. 2015. Vol. 91, № 3. P. 037901-1-037901-4 |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.91.037901 |
| Popis: | The effect of isoscalar S-wave multichannel pi pi -> pi pi, K antiK, eta eta scattering is considered in the analysis of decay data of the Upsilon-mesons. We show that when allowing for the final state interaction contribution to the decays Upsilon(mS) -> Upsilon(nS) pi pi (m>n, m=2,3, n=1,2) in our model-independent approach, we can explain the two-pion energetic spectra of these Upsilon transitions including the two-humped shape of the di-pion mass distribution in Upsilon(3S) -> Upsilon(1S) pi pi as the coupled-channel effect. It is shown also that the considered bottomia decay data do not offer new insights into the nature of the f0 mesons, which were not already deduced in our previous analyses of pseudoscalar meson scattering data. 4 pages |
| Databáze: | OpenAIRE |
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