Study of the process e + e– → π+ π– π0 with the CMD-3 detector at the electron-positron collider VEPP-2000
D. S. Vasileuskaya,
D. N. Grigoriev,
I. G. Dudko,
V. L. Ivanov,
V. F. Kazanin,
A. N. Kozyrev,
A. A. Ruban,
A. E. Ryzhenenkov,
S. S. Tolmachev,
G. V. Fedotovich,
D. N. Shemyakin,
D. V. Shoukavy,
L. B. Epshteyn https://doi.org/10.29235/1561-2430-2020-56-4-449-458
Abstract
The cross section of the process e+ e– → π+ π– π0 was measured with the CMD-3 detector at the electron-positron collider VEPP-2000 in the energy region from 750 MeV to 800 MeV in c.m.s. This measurement was based on the data collected in 2013 and related to an integrated luminosity of about 7.8 pb–1. The procedure for obtaining the Born cross section and determining the parameters of the ω-meson was worked out. The preliminary ω-meson parameters mω = 782.70 ± 0.02 ± ± 0.11 MeV, Гω = 8.74 ± 0.05 ± 0.22 MeV, σ0(ω → π+ π– π) = 1545 ± 4 ± 39 nb were obtained. The results were compared with previous data and proven to demonstrate a good agreement with them.
About the Authors
D. S. Vasileuskaya
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Darya S. Vasileuskaya – Junior Researcher
68-2, Nezavisimosti Ave., 220072, Minsk
D. N. Grigoriev
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University;
Novosibirsk State Technical University
Russian Federation
Russian Federation
Dmitry N. Grigoriev – Ph. D. (Physics and Mathematics), Head of the Laboratory, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk;
Head of the Laboratory, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences, 11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Assistant Professor, Novosibirsk State Technical University, 20, K. Marksa Ave., 630073, Novosibirsk
I. G. Dudko
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Igor G. Dudko – Researcher
68-2, Nezavisimosti Ave., 220072, Minsk
V. L. Ivanov
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University
Russian Federation
Russian Federation
Vyacheslav L. Ivanov – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences,11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Assistant Professor, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk
V. F. Kazanin
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University
Russian Federation
Russian Federation
Vasily F. Kazanin – Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences, 11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Assistant Professor, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk
A. N. Kozyrev
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University
Russian Federation
Russian Federation
Aleksey N. Kozyrev – Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences, 11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Assistant Professor, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk
A. A. Ruban
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University
Russian Federation
Russian Federation
Aleksandr A. Ruban – Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences, 11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Assistant Professor, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk
A. E. Ryzhenenkov
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University
Russian Federation
Russian Federation
Artem E. Ryzhenenkov – Junior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences, 11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Senior Lecturer, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk
S. S. Tolmachev
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences
Russian Federation
Russian Federation
Sergey S. Tolmachev – Postgraduate Student, Senior Laboratory Assistant
11, Akademika Lavrentieva Ave., 630090, Novosibirsk
G. V. Fedotovich
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University
Russian Federation
Russian Federation
Gennady V. Fedotovich – Dr. Sc. (Physics and Mathematics), Chief Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences, 11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Professor, Head of the Department, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk
D. N. Shemyakin
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University
Russian Federation
Russian Federation
Dmitry N. Shemyakin – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences, 11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Assistant Professor, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk
D. V. Shoukavy
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Dzmitry V. Shoukavy – Ph. D. (Physics and Mathematics), Leading Researcher
68-2, Nezavisimosti Ave., 220072, Minsk
L. B. Epshteyn
Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State Technical University
Russian Federation
Russian Federation
Leonid В. Epshteyn – Researcher, Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk;
Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences, 11, Akademika Lavrentieva Ave., 630090, Novosibirsk;
Senior Lecturer, Novosibirsk State Technical University, 20, K. Marks Ave., 630073, Novosibirsk
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