[en] The electromagnetic endcap BGO calorimeter of the CMD-3 detector is ready for experiments at the new e⁺e^- collider VEPP-2000. Light readout is performed by silicon photodiodes. A thermalcontrol system that is able to maintain the calorimeter temperature at a level of 12 ±1 deg. C was designed and manufactured. All blocks of the endcap calorimeter are assembled, tested, and prepared for installing at the detector.

[en] A large data sample of e⁺e^-→ 4π collected by the CMD-3 experiment at the VEPP-2000 e⁺ e⁻ collider allowed for an amplitude analysis of the process e⁺e⁻→ 4π in the center-of-mass energy range 900–2000 MeV. Various intermediate components were distinguished and dominance of the ωπ⁰ and a₁π amplitudes has been proved.

[en] Regular data taking with the CMD-3 at the electron-positron collider VEPP-2000 is under way since 2010. The collected data sample corresponds to about 200 inverse picobarns of integrated luminosity per detector in the energy range from 0.32 up to 2 GeV, with a goal to collect about 1 fb⁻¹ during next five years. Some of the recent results from the CMD-3 detector are discussed.

[en] A study of hadron production at the nucleon-antinucleon threshold has been performed with the CMD-3 detector at the VEPP-2000 e⁺e⁻ collider. A very fast rise with an about 1 MeV width has been observed in the e⁺e⁻→ pp̅ cross section. A sharp drop in the e⁺ e⁻→ 3(π⁺π⁻) cross section has been con?rmed and found to have a width of less than 2 MeV, in agreement with the observed fast rise of the e⁺e⁻→ pp̅ cross section. For the ?rst time a similar sharp drop is demonstrated in the e⁺e⁻→ K⁺ K⁻π⁺π⁻ cross section. The behavior of the e⁺e⁻→ 3(π⁺ π⁻), K⁺ K⁻π⁺π⁻ cross sections cannot be explained by an interference of any resonance amplitude with continuum, therefore this phenomenon cannot be due to a narrow near-threshold resonance. No such structure has been observed in the e⁺e⁻→ 2(π⁺π⁻) cross section.

[en] The cross section of the process e⁺ e⁻→ K_S K_L π⁰ has been studied with the CMD-3 detector at the VEPP-2000 electron-positron collider in the center-of-mass energy range from 1.1 to 2 GeV. Preliminary results on the total cross section of the process are presented.

[en] A search for the process e⁺e⁻→ D^*0(2007) has been performed with the CMD-3 detector at the VEPP-2000 e⁺e⁻-collider. Two main decay modes of the D^*0(2007) decay, D⁰π⁰ and D⁰γ, followed by D⁰ → K⁺π⁻π⁺π⁻are used in this analysis. With an integrated luminosity of 3.7 pb⁻¹ collected at the center-of-mass energy E_c.m. =2006.62 MeV our preliminary upper limit is B_{D*⁰→e+ e−}<1.6× 10⁻⁶ at 90%C.L.

[en] The process e⁺ e⁻→ K⁺ K⁻π⁰ has been studied in the center-of-mass energy range from 1.2 to 2 GeV using a 80.6 pb⁻¹ data sample collected with the CMD-3 detector at the electron-positron collider VEPP-2000. Preliminary results of the cross-section measurement are presented.

[en] The BGO endcap calorimeter was successfully operated in the CMD-2 detector at the VEPP-2M collider. It consists of 680 BGO crystals, each with a size of 25 × 25 × 150 mm³, arranged in two identical endcaps, with a total crystal weight of 450 kg. The light readout used vacuum phototriodes. The endcap calorimeter has been upgraded to operate in the CMD-3 detector at the new collider VEPP-2000. The major part of the endcap calorimeter, the BGO crystals, remains the same. The main upgrade is the use of silicon PIN photodiodes and new electronics. The main reason to change a photosensitive device is the strong non-uniform magnetic field in the endcap calorimeter volume and reduced available space. The Hamamatsu PIN photodiode S3590-08 was chosen as an optimal solution, as it is insensitive to magnetic fields and is both compact and stable. An order of magnitude larger capacitance of silicon photodiodes requires design and produce new custom electronics. The upgrade is expected to bring an overall improvement of parameters. The endcap calorimeter has been installed in the detector and participates in data taking which started in 2010. The preliminary energy resolution is measured in the energy range 160–1000 MeV. It is better to compare to the CMD-2 detector

[en] The preliminary results of measurement of the e⁺ e⁻ → π⁺π⁻π⁰ cross section in the 1.05–2 GeV center-of-mass energy range with 30 pb^–1 of experimental data collected using the CMD-3 detector are presented. The parameters of resonant states ω(1420) and ω(1650) are obtained.

[en] The cross section of the process e⁺e⁻→ π⁺π⁻π⁺π⁻ has been measured using an integrated luminosity of 17 pb⁻¹ collected with the CMD-3 detector in the center-of-mass energy range 650-1000 MeV. High-precision measurements of various hadronic cross sections are of great interest in relation with the problem of the muon anomalous magnetic moment g-2. This measurement can be also used to test the relation between the cross section of e⁺e⁻→ π⁺ π⁻π⁺ π⁻ and the spectral function for the τ⁻→ π⁻π⁰π⁰π⁰ decay predicted by the conservation of vector current (CVC).