TY  - CONF
AU  - Surovtsev, Yu. S.
AU  - Bydzovsky, P.
AU  - Gutsche, T.
AU  - Kaminski, R.
AU  - Lyubovitskij, V. E.
AU  - Nagy, M.
TI  - The interference effects of multi-channel pion-pion scattering in final states of charmonia and bottomonia decays
IS  - DESY-PROC-2016-04
CY  - Hamburg
PB  - Verlag Deutsches Elektronen-Synchrotron
M1  - PUBDB-2017-06838
M1  - DESY-PROC-2016-04
SN  - 978-3-945931-07-3
T2  - DESY-PROC
SP  - 286-296
PY  - 2017
AB  - There is presented a unified analysis of all available data on the decays Υ(mS)→Υ(nS)ππ (m > n, m=2,3,4,5, n=1,2,3), J/ψ→ϕ(ππ, K―K), and ψ(2S)→ J/ψππ and the data on isoscalar S-wave processes ππ→ππ,K―K,ηη. The multi-channel ππ scattering is described in our model-independent approach based on analyticity and unitarity and using an uniformization procedure. It is shown that the basic shape of dipion mass distributions in the two-pion transitions of both charmonia and bottomonia states are explained by an unified mechanism based on the contribution of the ππ, K―K and ηη coupled channels including their interference.
T2  - Quantum Field Theory at the Limits
CY  - 18 Jul 2016 - 30 Jul 2016, Dubna (Russia)
Y2  - 18 Jul 2016 - 30 Jul 2016
M2  - Dubna, Russia
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.3204/DESY-PROC-2016-04/Surovtsev
UR  - https://bib-pubdb1.desy.de/record/330339
ER  -