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-Reference-Cited by-同舟云学术

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

Published:2024-04-02 Issue:1 Volume:60 Page:52-71
ISSN:2524-2415
Container-title:Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series
language:
Short-container-title:Vescì Akademìì navuk Belarusì. Seryâ fizika-matematyčnyh navuk

Author:

Amirkhanov A. N.¹,Anisenkov A. V.¹,Aulchenko V. M.¹,Akhmetshin R. R.¹,Bashtovoy N. S.²,Berkaev D. E.¹,Bondar A. E.¹,Bragin A. V.²,Vasileuskaya D. S.³^ORCID,Gorkovenko A. O.⁴,Grancagnolo F.⁵,Grebenuk A. A.²,Gribanov S. S.¹,Grigoriev D. N.⁴,Epifanov D. A.¹,Erofeev A. L.¹,Zhadan D. S.²,Zemlyansky I. M.²,Zubakin A. S.²,Ivanov V. L.¹,Ignatov F. V.²,Karpov S. V.²,Kazanin V. F.¹,Kirpotin A. N.²,Koop I. A.¹,Korobov A. A.¹,Kozyrev A. N.¹,Kozyrev E. A.²,Krokovny P. P.⁴,Kuzmin A. S.¹,Kuzmenko A. E.²,Kurochkin Yu. A.³,Kutsenko B. D.⁶,Logashenko I. B.¹,Lukin P. A.¹,Mikhailov K. Yu.¹,Okhapkin V. S.²,Otboev A. V.²,Pestov Yu. N.²,Popov A. S.¹,Razuvaev G. P.¹,Rogovsky Yu. A.¹,Ruban A. A.²,Ryskulov N. M.²,Ryzhenenkov A. E.¹,Semenov A. V.¹,Senchenko A. I.²,Sibidanov A. L.⁷,Solodov E. P.¹,Talyshev A. A.¹,Titov V. M.²,Tolmachev S. S.¹,Fedotovich G. V.¹,Shatunov Yu. M.²,Shwartz B. A.¹,Shebalin V. E.¹,Shemyakin D. N.¹,Shoukavy D. V.³^ORCID,Epshteyn L. B.⁸,Yudin Yu. V.⁴

Affiliation:

1. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University

2. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences

3. B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus

4. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences; Novosibirsk State Technical University

5. Istituto Nazionale di Fisica Nucleare, Sezione di Lecce

6. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences; Aix-Marseille University

7. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences; University of Victoria

8. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences; Novosibirsk State Technical University; Novosibirsk State University

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.

Publisher

Publishing House Belorusskaya Nauka

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