The Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences (BINP SB RAS), plans to create the Super Charm-Tau Factory (SCTF) accelerator complex, it will operate in a wide ...energy range of 2
E
= 2–5 GeV in c.m. and have design luminosity of
L
= 1 × 10
35
cm
–2
s
–1
. As part of the physical program, it is proposed to carry out the experiment by measuring the Weinberg running weak mixing angle for the J/ψ meson energy. Due to the smallness of the predicted effect, it is necessary to exclude the influence of systematic errors from unpredictable changes in the magnet lattice and the beam background. To do this, we have to organize frequent changes in sign of the longitudinal polarization of the electron beam at the interaction point. In this paper we have investigated the possibility of the spin-flip using the spin RF-rotator in a colliding electron ring with three Siberian snakes. Based on the simulation results, conclusions about the possibility of using this approach are made.
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
−
π
0
π
0
π
0
decay predicted by the conservation of vector current (CVC).
Recent results from the CMD-3 detector Lukin, P.A.; Akhmetshin, R.R.; Amirkhanov, A.N. ...
Nuclear and particle physics proceedings,
January-March 2020, 2020-01-00, Letnik:
309-311
Journal Article
Recenzirano
This paper reports a current status of the measurements of the hadronic cross sections in the c.m. energy range from 0.32 to 2.0 GeV with the CMD-3 detector at the VEPP-2000 electron-positron ...collider. The overall size of the data, acquired by the CMD-3 in the runs of 2010–2013 and 2017–2018 years, is about 160 pb−1. The results of data analysis for various exclusive modes of e+e−→hadrons are described.
This paper reports measurements of the hadronic cross sections with the CMD-3 detector at the VEPP-2000 electron-positron collider. The overall size of the data sample analyzed is about 60 pb-1, ...collected by the CMD- 3 running since December 2010 up to June 2013 in the c.m. energy range from 0.32 to 2.0 GeV. The preliminary results of data analysis for various modes of e+e−→hadrons are discussed.
Experimental input from $e^+e^-$ machines to hadronic contribution to muon (g-2) M. N. Achasov, R. R. Akhmetshin, A. N. Amirkhanov, A. V. Anisenkov, V. M. Aulchenko, V. Sh. Banzarov, A. Yu. Barnyakov, N. S. Bashtovoy, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. E. Bondar, A. A. Botov, A. V. Bragin, T. V. Dimova, V. P. Druzhinin, S. I. Eidelman, D. A. Epifanov, L. B. Epshteyn, A. L. Erofeev, G. V. Fedotovich, S. E. Gayazov, V. B. Golubev, A. A. Grebenuk, S. S. Gribanov, D. N. Grigoriev, F. V. Ignatov, V. L. Ivanov, L. V. Kardapoltsev, S. V. Karpov, V. F. Kazanin, A. G. Kharlamov, A. N. Kirpotin, I. A. Koop, A. A. Korol, A. A. Korobov, S. V. Koshuba, A. N. Kozyrev, E. A. Kozyrev, D. P. Kovrizhin, P. P. Krokovny, A. S. Kupich, A. E. Kuzmenko, A. S. Kuzmin, R. A. Litvinov, I. B. Logashenko, P. A. Lukin, K. A. Martin, N. A. Melnikova, K. Yu. Mikhailov, A. E. Obrazovsky, V. S. Okhapkin, A. V. Otboev, E. V. Pakhtusova, Yu. N. Pestov, A. S. Popov, K. V. Pugachev, G. P. Razuvaev, A. A. Ruban, N. M. Ryskulov, A. E. Ryzhenenkov, A. I. Senchenko, S. I. Serednyakov, Yu. M. Shatunov, P. Yu. Shatunov, V. E. Shebalin, D. N. Shemyakin, D. A. Shtol, B. A. Shwartz, D. B. Shwartz, A. L. Sibidanov, Z. K. Silagadze, E. P. Solodov, I. K. Surin, A. A. Talyshev, V. M. Titov, S. S. Tolmachev, A. I. Vorobiov, I. M. Zemlyansky, Yu. V. Yudin
SciPost physics proceedings,
02/2019
1
Journal Article
Recenzirano
Odprti dostop
Precise study of the hadrons production in $e^+e^-$ annihilation at low energies provides important information about interactions of light quarks and spectroscopy of their bound states. These ...studies are especially important for theoretical calculations of the muon $(g-2)$ via the Standard Model because of the present difference between theoretical and experimental values exceeds three standard deviations. In this report we will discuss current status and recent results obtained by the CMD-3 experiment and will give a brief look to status of the BaBar and Belle II experiments.
Preliminary results of the first experiments at the new VEPP-2000 e+e− collider are presented. The experiments have been carried out in the center of mass energy range 1–2 GeV with instant luminosity ...1030–1031cm−2s−1 and total integrated luminosity of about 10pb−1. The main e+e− annihilation cross sections, π+π−π0π0,π+π−π0,π0π0γ,andπ+π−η, have been measured. The cross section of nucleon–antinucleon production is also presented.
Self-polarizing electron ring for eRHIC project Otboev, A.V.; Shatunov, Yu.M.; Ptitsyn, V.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
01/2005, Letnik:
536, Številka:
3
Journal Article
Recenzirano
We present the electron storage ring for an arrangement of electron–proton and electron–ion collisions at RHIC. High degree of radiative electron polarization will be achieved at the beam energy ...range 5–10
GeV with characteristic time about 10
min. Required luminosity of polarized e–p collisions for studies of deep inelastic scattering is 1×10
33
cm
−2
s
−1 in the SCM energy range 15–100
GeV.
PDF
