The first measurement of the conversion decay of the omega meson into a neutral pion and an electron-positron pair at the CMD-3 detector
https://doi.org/10.29235/1561-2430-2024-60-1-52-71
Abstract
The conversion decay w® p0e+e- with the CMD-3 detector on the VEPP-2000 electron-positron collider VEPP-2000 at the Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences was investigated. The data from the first scan were used in the work, which corresponded to an integral brightness of around 10 pb–1 in the energy range of 660 to 840 MeV in the center of mass system. The 1113 ± 37 signal events were detected. The product of the relative decay probability and ω-meson width G(w® e+e- ) × Br(w® p0e+e- ) = (4, 20 ± 0,12 ± 0, 25) ×10-7 MeV, as well branching ratio Br(w® p0e+e- ) = (6, 78 ± 0,19 ± 0, 40) ×10-4 are measured with better precision than the world average.
About the Authors
A. N. AmirkhanovRussian Federation
Artem N. Amirkhanov – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University (
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. V. Anisenkov
Russian Federation
Aleksey V. Anisenkov – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,,
2, Pirogov Str., 630090, Novosibirsk
V. M. Aulchenko
Russian Federation
Vladimir M. Aulchenko – Dr. Sc. (Engineering), Chief Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,,
2, Pirogov Str., 630090, Novosibirsk
R. R. Akhmetshin
Russian Federation
Ravil R. Akhmetshin – Ph. D. (Physics and Mathe- matics), Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Senior Lecturer, Specialized Educational Scientific Center of the Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,,
2, Pirogov Str., 630090, Novosibirsk
N. S. Bashtovoy
Russian Federation
Nikolay S. Bashtovoy – Lead Engineer
11, Academic Lavrentiev Аve., 630090, Novosibirsk
D. E. Berkaev
Russian Federation
Dmitry E. Berkaev – Ph. D. (Physics and Mathema- tics), Deputy Director, Head of the Laboratory, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. E. Bondar
Russian Federation
Aleksandr E. Bondar – Academician of the Russian Academy of Sсiences, Dr. Sc. (Physics and Mathematics), Head of the Laboratory, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Professor, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. V. Bragin
Russian Federation
Aleksey V. Bragin – Ph. D. (Engineering) Senior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
D. S. Vasileuskaya
Belarus
Darya S. Vasileuskaya – Researcher
68-2, Nezavisimosti Ave., 220072, Minsk
A. O. Gorkovenko
Russian Federation
Anton O. Gorkovenko – Research Engineer, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Assistant, Novosibirsk State Technical University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
20, K. Marks Ave., 630073, Novosibirsk
F. Grancagnolo
Italy
Francesco Grancagnolo – Professor, Instituto Nazionale di Fisica Nucleare, Sezione di Lecce
Via Provinciale per Arnesano, 73100, Lecce
A. A. Grebenuk
Russian Federation
Andrey A. Grebenuk – Senior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
S. S. Gribanov
Russian Federation
Sergey S. Gribanov – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Senior Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
D. N. Grigoriev
Russian Federation
Dmitry N. Grigoriev – Ph. D. (Physics and Mathe- matics), Leading Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Associate Professor, Novosibirsk State Technical University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
20, K. Marks Ave., 630073, Novosibirsk
D. A. Epifanov
Russian Federation
Denis A. Epifanov – Ph. D. (Physics and Mathematics), Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Senior Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. L. Erofeev
Russian Federation
Andrey L. Erofeev – Senior Laboratory Assistant, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Master’s Degree Student, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
D. S. Zhadan
Russian Federation
Daniil S. Zhadan – Junior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
I. M. Zemlyansky
Russian Federation
Ilya M. Zemlyansky – Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
A. S. Zubakin
Russian Federation
Aleksandr S. Zubakin – Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
V. L. Ivanov
Russian Federation
Vyacheslav L. Ivanov – Ph. D. (Physics and Mathematics), Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
F. V. Ignatov
Russian Federation
Fedor V. Ignatov – Ph. D. (Physics and Mathematics), Senior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
S. V. Karpov
Russian Federation
Sergey V. Karpov – Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
V. F. Kazanin
Russian Federation
Vasily F. Kazanin – Ph. D. (Physics and Mathematics), Leading Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Senior Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. N. Kirpotin
Russian Federation
Aleksandr N. Kirpotin – Senior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
I. A. Koop
Russian Federation
Ivan A. Koop – Dr. Sc. (Physics and Mathematics), Professor, Leading Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. A. Korobov
Russian Federation
Aleksandr A. Korobov – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. N. Kozyrev
Russian Federation
Aleksey N. Kozyrev – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State Technical University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
E. A. Kozyrev
Russian Federation
Evgeny A. Kozyrev – Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
P. P. Krokovny
Russian Federation
Pavel P. Krokovny – Ph. D. (Physics and Mathematics), Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
20, K. Marks Ave., 630073, Novosibirsk
A. S. Kuzmin
Russian Federation
Alelsandr S. Kuzmin – Dr. Sc. (Physics and Mathema- tics), Leading Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. E. Kuzmenko
Russian Federation
Anastasiya E. Kuzmenko – Junior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
Yu. A. Kurochkin
Belarus
Yurii A. Kurochkin – Dr. Sc. (Physics and Mathematics), Professor, Head of Center
68-2, Nezavisimosti Ave., 220072, Minsk
B. D. Kutsenko
Russian Federation
Bogdan D. Kutsenko – Senior Laboratory Assistant, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences (11, Academic Lav- rentiev Аve., 630090, Novosibirsk, Russian Federation); Postgraduate Student, Aix-Marseille University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
CNRS/ IN2P3, CPPM, Marseille
I. B. Logashenko
Russian Federation
Ivan B. Logashenko – Dr. Sc. (Physics and Mathematics), Professor, Deputy Director for Sciences, Head of the Laboratory, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Head of the Department, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
P. A. Lukin
Russian Federation
Petr A. Lukin – Ph. D. (Physics and Mathematics), Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
K. Yu. Mikhailov
Russian Federation
Kirill Yu. Mikhailov – Ph. D. (Chemistry), Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
V. S. Okhapkin
Russian Federation
Victor S. Okhapkin – Leading Design Engineer
11, Academic Lavrentiev Аve., 630090, Novosibirsk
A. V. Otboev
Russian Federation
Aleksey V. Otboev – Senior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
Yu. N. Pestov
Russian Federation
Yury N. Pestov – Ph. D. (Physics and Mathematics), Leading Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
A. S. Popov
Russian Federation
Aleksandr S. Popov – Ph. D. (Physics and Mathematics), Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
G. P. Razuvaev
Russian Federation
Georgy P. Razuvaev – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Assistant of the Department, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
Yu. A. Rogovsky
Russian Federation
Yury A. Rogovsky – Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novo- sibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. A. Ruban
Russian Federation
Aleksandr A. Ruban – Senior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
N. M. Ryskulov
Russian Federation
Nikolay M. Ryskulov – Senior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
A. E. Ryzhenenkov
Russian Federation
Artem E. Ryzhenenkov – Junior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Senior Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. V. Semenov
Russian Federation
Aleksandr V. Semenov – Senior Laboratory Assistant, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Master’s Degree Student, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. I. Senchenko
Russian Federation
Aleksandr I. Senchenko – Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
A. L. Sibidanov
Russian Federation
Aleksey L. Sibidanov – Researcher, University of Victoria
Victoria, BC, Canada V8W 3P6
E. P. Solodov
Russian Federation
Evgeny P. Solodov – Dr. Sc. (Physics and Mathematics), Chief Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Professor, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
A. A. Talyshev
Russian Federation
Aleksey A. Talyshev – Ph. D. (Physics and Mathematics), Senior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Senior Lecturer, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
V. M. Titov
Russian Federation
Vitaly M. Titov – Ph. D. (Technical Sciences), Senior Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
S. S. Tolmachev
Russian Federation
Sergey S. Tolmachev – Junior Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Assistant of the Department, Novosibirsk State University
11, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
G. V. Fedotovich
Russian Federation
Gennady V. Fedotovich – Dr. Sc. (Physics and Mathe- matics), Chief Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Professor, Head of the De- partment of Physics, Novosibirsk State University
1, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
Yu. M. Shatunov
Russian Federation
Yury M. Shatunov – Corresponding Member of the Russian Academy of Sсiences, Dr. Sc. (Physics and Mathematics), Chief Researcher
11, Academic Lavrentiev Аve., 630090, Novosibirsk
B. A. Shwartz
Russian Federation
Boris A. Shwartz – Dr. Sc. (Physics and Mathematics), Chief Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Professor, Novosibirsk State University
1, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
V. E. Shebalin
Russian Federation
Vasily E. Shebalin – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novo- sibirsk State University
1, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
D. N. Shemyakin
Russian Federation
Dmitry N. Shemyakin – Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Lecturer, Novosibirsk State University
1, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
D. V. Shoukavy
Belarus
Dzmitry V. Shoukavy – Ph. D. (Physics and Mathe- matics), Leading Researcher
68-2, Nezavisimosti Ave., 220072, Minsk
L. B. Epshteyn
Russian Federation
Leonid В. Epshteyn – Researcher, Novosibirsk State University; Researcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Senior Lecturer, Novosibirsk State Technical University
2, Pirogov Str., 630090, Novosibirsk,
1, Academic Lavrentiev Аve., 630090, Novosibirsk,
20, K. Marks Ave., 630073, Novosibirsk
Yu. V. Yudin
Russian Federation
Yury V. Yudin – Ph. D. (Engineering), Senior Re- searcher, Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Senior Lecturer, Specialized Educational Scientific Center of the Novosibirsk State University
1, Academic Lavrentiev Аve., 630090, Novosibirsk,
2, Pirogov Str., 630090, Novosibirsk
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