The process $e^+e^- \to \omega\pi^0 \to \pi^+\pi^-\pi^0\pi^0$ is studied in the center-of-mass energy region $1.05-2.00$ GeV using data with an integral luminosity of about 35 pb$^{-1}$ collected with the SND detector at the VEPP-2000 $e^+e^-$ collider. In the energy range under study, the value of the measured Born cross section varies from 0.7 to 18 nb. The statistical uncertainty of the cross section is $2-23$%, while the systematic uncertainty is in the range of $3.0-14.2$%. The results are consistent with previous measurements but have better accuracy.

The cross section of the process $e^+e^-\to\pi^+\pi^-$ has been measured in the center of mass energy range from 0.32 to 1.2 GeV with the CMD-3 detector at the electron-positron collider VEPP-2000. The measurement is based on a full dataset collected below 1 GeV during three data taking seasons, corresponding to an integrated luminosity of about 62 pb$^{-1}$. In the dominant $\rho$-resonance region, a systematic uncertainty of 0.7% has been reached. At energies around $\phi$-resonance the $\pi^+\pi^-$ production cross section was measured for the first time with high energy resolution. The forward-backward charge asymmetry in the $\pi^+\pi^-$ production has also been measured. It shows the strong deviation from the theoretical prediction based on conventional sQED framework and is in good agreement with GVDM and dispersive-based predictions. The impact of presented results on the evaluation of the hadronic contribution to the anomalous magnetic moment of muon is discussed.

The VEPP-5 injection complex, consisting of two linacs and a damping storage ring, delivers electron and positron beams to the VEPP-4M and VEPP-2000 colliders operating at BINP. Over three years of injector operation, its efficiency has significantly increased and the maximum positron-storage rate has reached 1.2 × 1010 s–1. This progress was reached through tuning the constituent machines, upgrading the accelerator technology, and deploying a new 11-MHz station of RF cavities. By the start of the next running season, a new electron gun with a significantly increased maximum current and cathode lifetime will be installed.

Work on developing new software tools for monitoring and controlling the VEPP-5 damping-ring (DR) operation with upgraded stations of beam-position sensors is in progress. Using them, the DR can be calibrated using its theoretical model, the beam orbit can be steered and locally distorted, the linac-beam capture into the DR can be simulated, and a number of other tasks can be performed. This paper reports the initial results of the DR calibration based on its numerical model and of the measurements of its parameters obtained using the already-available codes of the software toolkit.

The in-depth understanding of beam collective effects in the damping ring (DR) of the VEPP-5 injection complex at BINP is essential for optimizing its operation. Towards this, beam longitudinal profiles at the stage of injection into the DR and for a high-current stored beam have been measured using a streak camera and a dissector. The process of linac-beam capture into the DR has been simulated, and characteristic parameters of the DR impedance have been obtained. The results of these studies are reported in this paper.

Precise study of the hadrons production in\bm{e^+e^-}𝐞+𝐞−annihilation at low energies provides important information aboutinteractions of light quarks and spectroscopy of their bound states.These studies are especially important for theoretical calculations ofthe muon \bm{(g-2)}(𝐠−2)via the Standard Model because of the present difference betweentheoretical and experimental values exceeds three standard deviations.In this report we will discuss current status and recent resultsobtained by the CMD-3 experiment and will give a brief look to status ofthe BaBar and Belle II experiments.

The present status of two operating BINP electron-positron colliders VEPP-2000 and VEPP-4M is given.

The Budker Institute of Nuclear Physics (BINP) project of the VEPP-2000 electron-positron Round Colliding Beams in the energy range 2*(0,25 ÷ 1) GeV has an average synchrotron radiation (SR) power of up to 1,0 kW/m at maximum currents Ie- = Ie+ = 200 mA. An overview of the VEPP-2000 complex vacuum system after the upgrade of injection complex at BINP is described here. This paper presents the dependences of photodesorption yield for aluminum and lifetime versus accumulated dose for future SRF "SKIF" (Siberian Research Facility "SKIF").

The VEPP-2000 electron–positron collider has been operating at BINP since 2010. Applying the concept of round colliding beams allows us to reach the record value of the beam–beam parameter, ξ ~ 0.12. The VEPP-2000 upgrade, including the connection to the new BINP Injection Complex, the improvement of the BEP booster, and the BEP–VEPP-2000 transfer channels for operation at 1 GeV, substantially increases the installation luminosity. Data collection is in progress.

After the VEPP-2000 and VEPP-4M colliders are switched to being supplied by beams from the VEPP-5 injection complex, the problem of ensuring the operation stability of the damping ring inflectors arises. Software on the basis of correlation analysis has been created to study the amplitude and delay deviations of the pulses of inflector generators. This allows the delay deviations of 1 ns for inflector signals that were digitized using ADC with a sampling frequency of 200 MHz to be observed. The dependence of the generator- delay deviation on the network voltage has been also discovered as a result of long-term observations.

VEPP-2000 is electron-positron collider exploiting the novel concept of round colliding beams. After three seasons of data taking in the whole energy range of 160-1000 MeV per beam it was stopped in 2013 for injection chain upgrade. The linking to the new BINP source of intensive beams together with booster synchrotron modernization provides the drastic luminosity gain at top energy of VEPP-2000.

The $e^+e^- \rightarrow K_S K_L \pi^0$ cross section is measured in the center-of-mass energy range $\sqrt{s}=1.3-2.0$ GeV. The analysis is based on the data sample with an integrated luminosity of 33.5 pb$^{-1}$ collected with the SND detector at the VEPP-2000 $e^+e^-$ collider.

The process $e^+e^-\to\omega\eta\pi^0$ is studied in the energy range $1.45-2.00$ GeV using data with an integrated luminosity of 33 pb$^{-1}$ accumulated by the SND detector at the $e^+e^-$ collider VEPP-2000. The $e^+e^-\to\omega\eta\pi^0$ cross section is measured for the first time. The cross section has a threshold near 1.75 GeV. Its value is about 2 nb in the energy range $1.8-2.0$ GeV. The dominant intermediate state for the process $e^+e^- \to \omega\eta\pi^0$ is found to be $\omega a_0(980)$.

The process $e^+e^-\to\omega\eta\pi^0$ is studied in the energy range $1.45-2.00$ GeV using data with an integrated luminosity of 33 pb$^{-1}$ accumulated by the SND detector at the $e^+e^-$ collider VEPP-2000. The $e^+e^-\to\omega\eta\pi^0$ cross section is measured for the first time. The cross section has a threshold near 1.75 GeV. Its value is about 2 nb in the energy range $1.8-2.0$ GeV. The dominant intermediate state for the process $e^+e^- \to \omega\eta\pi^0$ is found to be $\omega a_0(980)$.

The collector ring is a dedicated ring for fast cooling of ions coming from separators at the FAIR project. To accommodate optimal technical solutions, a structure of a magnet lattice was recently reviewed and modified. Consequently, more appropriate technical solutions for the main magnets could be adopted. A general layout and design of the present machine is shown. The demanding extraction schemes have been detailed and open design issues were completed.