The cross section of the process e+e−→3(π+π−) has been measured using 22 pb−1 of integrated luminosity collected with the CMD-3 detector at the VEPP-2000 e+e− collider in the c.m. energy range 1.5 -- 2.0 GeV. The measured cross section exhibits a sharp drop near the ppˉ threshold. A first study of dynamics of six-pion production has been performed.
@article{arxiv.1302.0053,
title = {Study of the process $e^+e^-\to 3(\pi^+\pi^-)$ in the c.m.energy range 1.5--2.0 gev with the cmd-3 detector},
author = {3 Collaboration and R. R. Akhmetshin and A. V. Anisenkov and S. A. Anokhin and V. M. Aulchenko and V. S. Banzarov and L. M. Barkov and N. S. Bashtovoy and D. E. Berkaev and A. E. Bondar and A. V. Bragin and S. I. Eidelman and D. A. Epifanov and L. B. Epshteyn and G. V. Fedotovich and S. E. Gayazov and A. A. Grebenuk and D. N. Grigoriev and E. N. Gromov and F. V. Ignatov and S. V. Karpov and V. F. Kazanin and B. I. Khazin and I. A. Koop and A. N. Kozyrev and P. P. Krokovny and A. E. Kuzmenko and A. S. Kuzmin and I. B. Logashenko and A. P. Lysenko and P. A. Lukin and K. Yu. Mikhailov and Yu. N. Pestov and E. A. Perevedentsev and S. A. Pirogov and S. G. Pivovarov and A. S. Popov and Yu. S. Popov and S. I. Redin and Yu. A. Rogovsky and A. L. Romanov and A. A. Ruban and N. M. Ryskulov and A. E. Ryzhenenkov and V. E. Shebalin and D. N. Shemyakin and B. A. Shwartz and D. B. Shwartz and A. L. Sibidanov and P. Yu. Shatunov and Yu. M. Shatunov and I. G. Snopkov and E. P. Solodov and V. M. Titov and A. A. Talyshev and A. I. Vorobiov and Yu. V. Yudin and A. S. Zaytsev},
journal= {arXiv preprint arXiv:1302.0053},
year = {2013}
}