Abstract

This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 3.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited. The effect of isoscalar S-wave processes pi pi -> pi pi, K (K) over bar, eta eta is considered in the analysis of data (from the ARGUS, CLEO, CUSB, Crystal Ball, Belle, BABAR collaborations) on the bottomonia decays - gamma(mS) -> gamma(nS) pi pi (m > n, m = 2, 3, 4, 5, n = 1, 2, 3). It is shown that the dipion mass spectra of these decays are explained by the unified mechanism related to the contribution of the multichannel pi pi scattering in the final states of these reactions. Since in the analysis the multichannel pi pi-scattering amplitudes did not change in comparison with the ones in our combined analysis of data on the multichannel pi pi scattering and on the charmonia decays -J/psi -> phi(pi pi, K (K) over bar) and psi(2S) -> J/psi(pi pi) (from the Crystal Ball, DM2, Mark II, Mark III, and BES II) - the results confirm all our earlier conclusions on the scalar mesons.