TY  - SER
AU  - Surovtsev,Yurii S.
AU  - Gutsche,Thomas
AU  - Kamiński,Robert
AU  - Lyubovitskij,Valery E.
AU  - Nagy,Miroslav
AU  - Bydžovský,Petr
ED  - Томский государственный университет
ED  - Томский государственный университет
TI  - Role of multichannel ππ scattering in decays of bottomia
KW  - мезоны
KW  - рассеяние
KW  - боттомий
KW  - статьи в журналах
N2  - The effect of isoscalar S-wave multichannel ππ→ππ, KK¯¯,ηη scattering is considered in the analysis of decay data of the Υ-mesons. We show that when allowing for the final state interaction contribution to the decays Υ(mS)→Υ(nS)ππ (m>n,m=2,3,n=1,2) in our model-independent approach, we can explain the two-pion energetic spectra of these Υ transitions including the two-humped shape of the di-pion mass distribution in Υ(3S)→Υ(1S)ππ 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
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000532447
ER  -