Intermediate dynamics of the four pions production in $e^+e^-$ annihilation and tau decay processes

Kozyrev, E A; Akhmetshin, R. R; Amirkhanov, A N; Anisenkov, A V; Aulchenko, V M; Banzarov, V Sh; Bashtovoy, N S; Berkaev, D E; Bondar, A. E.; Bragin, A V; Eidelman, S I; Epifanov, A D; Epshteyn, L B; Erofeev, A L; Fedotovich, G V; Gayazov, S E; Grebenuk, A. A; Gribanov, S. S; Grigoriev, D N; Ignatov, F V; Ivanov, V L; Karpov, S V; Kazanin, V F; Koop, I A; Kirpotin, A N; Korobov, A. A; Kozyrev, A N; Krokovny, P. P; Kuzmenko, A E; Kuzmin, A S; Logashenko, I B; Lukin, P A; Mikhailov, K Yu; Okhapkin, V S; Pestov, Yu N; Popov, A S; Razuvaev, G P; Rogovsky, Yu A; Ruban, A. A; Ryskulov, N M; Ryzhenenkov, A E; Semenov, A V; Shatunov, Yuri M.; Shatunov, P Yu; Shebalin, V E; Shemyakin, D N; Shwartz, B A; Shwartz, D B; Sibidanov, A L; Solodov, E P; Titov, V M; Talyshev, A. A; Vorobiov, A I; Zemlyansky, I M; Yudin, Yu V

doi:10.22323/1.364.0525

Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - QCD and Hadronic Physics

Intermediate dynamics of the four pions production in $e^+e^-$ annihilation and tau decay processes

E.A. Kozyrev*, R.R. Akhmetshin, A.N. Amirkhanov, A.V. Anisenkov, V.M. Aulchenko, V.S. Banzarov, N.S. Bashtovoy, D.E. Berkaev, A.E. Bondar, A.V. Bragin, S.I. Eidelman, A.D. Epifanov, L.B. Epshteyn, A.L. Erofeev, G.V. Fedotovich, S.E. Gayazov, A.A. Grebenuk, S.S. Gribanov, D.N. Grigoriev, F.V. Ignatov, V.L. Ivanov, S.V. Karpov, V.F. Kazanin, I.A. Koop, A.N. Kirpotin, A.A. Korobov, A.N. Kozyrev, P.P. Krokovny, A.E. Kuzmenko, A.S. Kuzmin, I.B. Logashenko, P.A. Lukin, K.Y. Mikhailov, V.S. Okhapkin, Y.N. Pestov, A.S. Popov, G.P. Razuvaev, Y.A. Rogovsky, A.A. Ruban, N.M. Ryskulov, A.E. Ryzhenenkov, A.V. Semenov, Y.M. Shatunov, P.Y. Shatunov, V.E. Shebalin, D.N. Shemyakin, B.A. Shwartz, D.B. Shwartz, A.L. Sibidanov, E.P. Solodov, V.M. Titov, A.A. Talyshev, A.I. Vorobiov, I.M. Zemlyansky and Y.V. Yudinet al. (click to show)

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Pre-published on: June 10, 2020

Published on: November 12, 2020

Abstract

In this article we print out preliminary results of an amplitude analysis of the $e^+e^-\to 4\pi$ process. The amplitude analysis is performed using experimental data from the CMD-3 detector at the VEPP-2000 collider in the energy range 0.9--2.007 GeV. In the study the dominance of the $e^+e^- \to \omega \pi^0 \to 4 \pi$ and $e^+e^- \to a_1(1260) \pi \to 4\pi$ amplitudes is proved, as well as sizable contributions of the $\rho^+\rho^-, \rho f_0(980), \rho \sigma$ and etc. states are observed. The obtained amplitude is used for the test of the isospin relations and hypothesis of conserved vector current (CVC).

DOI: https://doi.org/10.22323/1.364.0525

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