https://doi.org/10.1051/epjconf/201713801025
Effect of the ηη channel and interference phenomena in the two-pion transitions of charmonia and bottomonia
1 Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
2 Nuclear Physics Institute of the CAS, 25068 Řež, Czech Republic
3 Institut für Theoretische Physik, Universität Tübingen, Kepler Center for Astro and Particle Physics, Auf der Morgenstelle 14, D-72076 Tübingen, Germany
4 Institute of Nuclear Physics of the PAN, Cracow 31342, Poland
5 Department of Physics, Tomsk State University, 634050 Tomsk, Russia
6 Mathematical Physics Department, Tomsk Polytechnic University, Lenin Avenue 30,, 634050 Tomsk, Russia
7 Institute of Physics, SAS, Bratislava 84511, Slovak Republic
* e-mail: surovcev@theor.jinr.ru
Published online: 27 March 2017
The basic shape of di-pion mass spectra in the two-pion transitions of both charmonia and bottomonia states is explained by a unified mechanism based on contributions of the ππ, KK̅, and ηη coupled channels including their interference. The role of the individual f0 resonances in shaping the di-pion mass distributions in the charmonia and bottomonia decays is considered.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
