Author:
Logashenko Ivan B.,Ignatov F.V.,Akhmetshin R.R.,Amirkhanov A.N.,Anisenkov A.V.,Aulchenko V.M.,Banzarov V.S.,Bashtovoy N.S.,Berkaev D.E.,Bondar A.E.,Bragin A.V.,Eidelman S.I.,Epifanov D.A.,Epshteyn L.B.,Erofeev A.L.,Fedotovich G.V.,Gayazov S.E.,Grebenuk A.A.,Gribanov S.S.,Grigoriev D.N.,Ivanov V.L.,Karpov S.V.,Kazanin V.F.,Kirpotin A.N.,Korobov A.A.,Koop I.A.,Kozyrev A.N.,Kozyrev E.A.,Krokovny P.P.,Kuzmenko A.E.,Kuzmin A.S.,Lukin P.A.,Mikhailov K.Yu.,Okhapkin V.S.,Otboev A.V.,Pestov Yu.N.,Popov A.S.,Razuvaev G.P.,Ruban A.A.,Ryskulov N.M.,Ryzhenenkov A.E.,Senchenko A.I.,Shebalin V.E.,Shemyakin D.N.,Shwartz B.A.,Shwartz D.B.,Sibidanov A.L.,Shatunov P.Yu.,Shatunov Yu.M.,Solodov E.P.,Talyshev A.A.,Vorobiov A.I.,Yudin Yu.V.,Zemlyansky I.M.
Abstract
The CMD-3 detector is installed at the VEPP-2000 e+e− collider at BINP (Novosibirsk, Russia). It is a general-purpose detector, equipped with a tracking system, two crystal (CSI and BGO) calorimeters, liquid Xe calorimeter, TOF and muon systems. The main goal of experiments at CMD-3 is a study of exclusive modes of e+e−→ hadrons at energies $ \sqrt s \le $ GeV. In particular, these results provide an important input for calculation of the hadronic contribution to the muon anomalous magnetic moment.
The first round of data taking was performed in 2011–2013, when about 60 1/pb were taken in the center-of-mass (c.m.) energy range from 0.32 to 2.0 GeV. Here we present a survey of results of data analysis.
Between 2013 and 2016 the collider and the detector were upgraded. The data taking resumed by the end of 2016. In the first run after the upgrade about 50 1/pb were collected at the energy range between 1.28 and 2.007 GeV. We discuss the upgrade and the first preliminary results from the new data.