The interference effects of multi-channel pion-pion scattering contributions to the final states of $\Psi$- and ${\rm Y}$-meson family decays

Abstract

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 $\pi \pi$, $K\overline{K}$ and $\eta \eta$ coupled channels including their interference.

arXiv comment5 pages, 3 figures, talk at the14th International Workshop on Meson Production, Properties and Interaction (Krakow, Poland, 2nd - 7th June 2016)

References in corpus (6)

• Observation of two charged bottomonium-like resonances in Y(5S) decays
• Observation of ${\rm Y}(4S)decaysto$π^+pi^-Υ(1S)$and$π^+pi^-Υ(2S)
• Study of Di-Pion Transitions Among Upsilon(3S), Upsilon(2S), and Upsilon(1S) States
• Observation of the decay Upsilon(4S) -> Upsilon(1S) pi+ pi-
• Masses and widths of scalar-isoscalar multi-channel resonances from data analysis
• Parameters of scalar resonances from the combined analysis of data on processes $\pi \pi \to \pi \pi ,K\bar{K},\eta \eta$ and $J/\psi$ decays