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Related papers: Experiments at VEPP-2M with SND detector

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The processes $e^+e^-\to\mu^+\mu^-$ and $e^+e^-\to\pi^+\pi^-$ have been studied with SND detector at VEPP-2M $e^+e^-$ collider in the vicinity of $\phi(1020)$ resonance. The branching ratios $B(\phi\to\mu^+\mu^-)=(3.30\pm 0.45\pm…

The results of the measurement of the $e^+e^- \to n \bar{n}$ cross section and effective neutron timelike form factor are presented. The data taking was carried out in 2020-2021 at the VEPP-2000 $e^+e^-$ collider in the center-of-mass…

The cross section of the process e+e-\to\mu+\mu- was measured in the SND experiment at the VEPP-2M e+e- collider in the energy region \sqrt{s}=980, 1040 -- 1380 MeV. The event numbers of the process e+e-\to\mu+\mu- were normalized to the…

The $e^+e^- \to \omega \pi^0 \to \pi^0 \pi^0 \gamma$ process was investigated in the SND experiment at the VEPP-2M collider. A narrow energy interval near the $\phi$-meson was scanned. The observed cross-section reveals, at the level of…

The process $e^+e^- \to \pi^+\pi^-\pi^0\eta$ is studied in the center-of-mass energy region below 2 GeV with the SND detector at the VEPP-2000 $e^+e^-$ collider. The four intermediate states contribute to this process: $\omega\eta$,…

Using the KEDR detector at the VEPP-4M $e^+e^-$ collider, we have measured the values of $R_{\text{uds}}$ and $R$ at seven points of the center-of-mass energy between 3.12 and 3.72 GeV. The total achieved accuracy is about or better than…

The process e+ e- -> phi -> K+ K- has been studied with the CMD-2 detector using about 542 000 events detected in the center-of-mass energy range from 1.01 to 1.034 GeV. The systematic error of the cross section is estimated to be 2.2%. The…

We report results of a search for narrow resonances in e+ e- annihilation at center-of-mass energies between 1.85 and 3.1 GeV performed with the KEDR detector at the VEPP-4M e+ e- collider. The upper limit on the leptonic width of a narrow…

The $e^+e^-\to n\bar{n}$ cross section was measured at center of mass (c.m.) energies from the threshold to 1908 MeV. The experiment to measure the cross section has been carried out at the VEPP-2000 $e^+e^-$ collider in 13 energy points.…

The cross section of the process $e^+e^-\to \pi^+\pi^-\pi^0$ was measured in the Spherical Neutral Detector experiment at the VEPP-2M collider in the energy region $\sqrt[]{s} = 980 \div 1380$ MeV. The measured cross section, together with…

The present work continues a series of the KEDR measurements of the $R$ value that started in 2010 at the VEPP-4M $e^+e^-$ collider. By combining new data with our previous results in this energy range we measured the values of…

High Energy Physics - Experiment · Physics 2018-11-14 V. V. Anashin , O. V. Anchugov , V. M. Aulchenko , E. M. Baldin , G. N. Baranov , A. K. Barladyan , A. Yu. Barnyakov , M. Yu. Barnyakov , S. E. Baru , I. Yu. Basok , A. M. Batrakov , E. A. Bekhtenev , A. E. Blinov , V. E. Blinov , A. V. Bobrov , V. S. Bobrovnikov , A. V. Bogomyagkov , A. E. Bondar , A. R. Buzykaev , P. B. Cheblakov , V. L. Dorohov , S. I. Eidelman , D. N. Grigoriev , S. A. Glukhov , V. V. Kaminskiy , S. E. Karnaev , G. V. Karpov , S. V. Karpov , K. Yu. Karukina , D. P. Kashtankin , P. V. Kasyanenko , T. A. Kharlamova , V. A. Kiselev , V. V. Kolmogorov , S. A. Kononov , K. Yu. Kotov , A. A. Krasnov , E. A. Kravchenko , V. N. Kudryavtsev , V. F. Kulikov , G. Ya. Kurkin , I. A. Kuyanov , E. B. Levichev , D. A. Maksimov , V. M. Malyshev , A. L. Maslennikov , O. I. Meshkov , S. I. Mishnev , I. A. Morozov , I. I. Morozov , S. A. Nikitin , I. B. Nikolaev , I. N. Okunev , A. P. Onuchin , S. B. Oreshkin , A. A. Osipov , I. V. Ovtin , S. V. Peleganchuk , S. G. Pivovarov , P. A. Piminov , V. V. Petrov , V. G. Prisekin , O. L. Rezanova , A. A. Ruban , G. A. Savinov , A. G. Shamov , D. N. Shatilov , D. A. Shvedov , B. A. Shwartz , E. A. Simonov , S. V. Sinyatkin , A. N. Skrinsky , A. V. Sokolov , D. P. Sukhanov , A. M. Sukharev , E. V. Starostina , A. A. Talyshev , V. A. Tayursky , V. I. Telnov , Yu. A. Tikhonov , K. Yu. Todyshev , A. G. Tribendis , G. M. Tumaikin , Yu. V. Usov , A. I. Vorobiov , V. N. Zhilich , A. A. Zhukov , V. V. Zhulanov , A. N. Zhuravlev

The cross section for the process e+e- --> omega pi0 --> pi0 pi0 gamma has been measured in the energy range 1.05--2.00 GeV. The experiment has been performed at the e+e- collider VEPP-2000 with the SND detector. The measured e+e- --> omega…

The project of upgrading the detector CMD-2 is presented. The upgraded detector is called CMD-2M and is going to take data with new collider VEPP-2000 at BINP. The general structure of the detector CMD-2 will remain as is but major…

High Energy Physics - Experiment · Physics 2007-05-23 D. Grigoriev , CMD-2M collaboration

A sensitivity of the VEPP-2000 $e^+e^-$ collider in a search for the rare decay $\eta \rightarrow e^+ e^-$ has been studied. The inverse reaction $e^+ e^- \rightarrow \eta$ is proposed for this search. We have analyzed a data sample with an…

The process e+e- ->pi+pi- has been studied with the SND detector at VEPP-2M e+e- collider in the vicinity of phi(1020) resonance. From the analysis of the energy dependence of measured cross section the branching ratio…