Preliminary results on CMD-3 measurement of e+e−→ π+π− cross section

Fedor Ignatov,I.B. Logashenko,R.R. Akhmetshin, A.N. Amirkhanov,Alexey Anisenkov,V.M. Aulchenko,V. S. 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,V. L. Ivanov,S.V. Karpov, A.S. Kasaev,Vassili Kazanin,A.A. Korobov, Ivan Koop,A.N. Kozyrev,E.A. Kozyrev, P. Krokovny, A.E. Kuzmenko,A.S. Kuzmin,P.A. Lukin,A. P. Lysenko,K.Yu. Mikhailov, V.S. Okhapkin,E.A. Perevedentsev,Yu.N. Pestov,A.S. Popov,G.P. Razuvaev,Yu. A. Rogovsky,A.A. Ruban,N.M. Ryskulov, A.E. Ryzhenenkov,V.E. Shebalin,D.N. Shemyakin,B.A. Shwartz,D. B. Shwartz,A.L. Sibidanov,Yu. M. Shatunov,E. P. Solodov,Alexey Talyshev, A.I. Vorobiov,Yu.V. Yudin

Epj Web of Conferences（2019）

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摘要

The CMD-3 detector has been successfully collecting data at the electron-positron collider VEPP-2000 since December 2010. The first scan below 1 GeV for a π+ π− measurement was performed in 2013. The collected data sample corresponds to about 18 pb−1 of integrated luminosity in this energy range. Analysis of the e + e − → π+ π− cross section is in progress. Status of this measurement are presented.

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