Physics Letters B (May 2016)

Measurement of the e+e−→K+K−π+π− cross section with the CMD-3 detector at the VEPP-2000 collider

  • D.N. Shemyakin,
  • G.V. Fedotovich,
  • R.R. Akhmetshin,
  • A.N. Amirkhanov,
  • A.V. Anisenkov,
  • V.M. Aulchenko,
  • V.Sh. Banzarov,
  • N.S. Bashtovoy,
  • A.E. Bondar,
  • A.V. Bragin,
  • S.I. Eidelman,
  • D.A. Epifanov,
  • L.B. Epshteyn,
  • A.L. Erofeev,
  • 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.A. Korobov,
  • O.A. Kovalenko,
  • A.N. Kozyrev,
  • E.A. Kozyrev,
  • P.P. Krokovny,
  • A.E. Kuzmenko,
  • A.S. Kuzmin,
  • I.B. Logashenko,
  • A.P. Lysenko,
  • P.A. Lukin,
  • K.Yu. Mikhailov,
  • V.S. Okhapkin,
  • Yu.N. Pestov,
  • E.A. Perevedentsev,
  • A.S. Popov,
  • G.P. Razuvaev,
  • Yu.A. Rogovsky,
  • A.A. Ruban,
  • N.M. Ryskulov,
  • A.E. Ryzhenenkov,
  • V.E. Shebalin,
  • B.A. Shwartz,
  • D.B. Shwartz,
  • A.L. Sibidanov,
  • Yu.M. Shatunov,
  • E.P. Solodov,
  • V.M. Titov,
  • A.A. Talyshev,
  • A.I. Vorobiov,
  • Yu.V. Yudin,
  • I.M. Zemlyansky

DOI
https://doi.org/10.1016/j.physletb.2016.02.072
Journal volume & issue
Vol. 756, no. C
pp. 153 – 160

Abstract

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The process e+e−→K+K−π+π− has been studied in the center-of-mass energy range from 1500 to 2000 MeV using a data sample of 23 pb−1 collected with the CMD-3 detector at the VEPP-2000 e+e− collider. Using about 24 000 selected events, the e+e−→K+K−π+π− cross section has been measured with a systematic uncertainty decreasing from 11.7% at 1500–1600 MeV to 6.1% above 1800 MeV. A preliminary study of K+K−π+π− production dynamics has been performed.