Physics Letters B (May 2019)

Study of the process e+e− → 3(π+π−)π0 in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

  • R.R. Akhmetshin,
  • A.N. Amirkhanov,
  • A.V. Anisenkov,
  • V.M. Aulchenko,
  • V.Sh. Banzarov,
  • N.S. Bashtovoy,
  • D.E. Berkaev,
  • A.E. Bondar,
  • A.V. Bragin,
  • S.I. Eidelman,
  • D.A. 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,
  • E.A. Kozyrev,
  • P.P. Krokovny,
  • A.E. Kuzmenko,
  • A.S. Kuzmin,
  • I.B. Logashenko,
  • P.A. Lukin,
  • K.Yu. Mikhailov,
  • V.S. Okhapkin,
  • A.V. Otboev,
  • Yu.N. Pestov,
  • A.S. Popov,
  • G.P. Razuvaev,
  • Yu.A. Rogovsky,
  • A.A. Ruban,
  • N.M. Ryskulov,
  • A.E. Ryzhenenkov,
  • A.I. Senchenko,
  • Yu.M. Shatunov,
  • P.Yu. 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,
  • Yu.V. Yudin

Journal volume & issue
Vol. 792
pp. 419 – 423

Abstract

Read online

The cross section of the process e+e−→3(π+π−)π0 has been measured for the first time using a data sample of 56.7 pb−1 collected with the CMD-3 detector at the VEPP-2000 e+e− collider. 632±32 signal events have been selected in the center-of-mass energy range 1.6–2.0 GeV. A study of dynamics of seven-pion production allows one to extract contributions of the dominated 2(π+π−)ω and 2(π+π−)η intermediate states.