Study of the process e + e– → π+ π– π0 with the CMD-3 detector at the electron-positron collider VEPP-2000-Reference-Cited by-同舟云学术

Study of the process e + e– → π+ π– π0 with the CMD-3 detector at the electron-positron collider VEPP-2000

Published:2020-12-31 Issue:4 Volume:56 Page:449-458
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:

Vasileuskaya D. S.¹^ORCID,Grigoriev D. N.²,Dudko I. G.¹,Ivanov V. L.³,Kazanin V. F.³,Kozyrev A. N.³,Ruban A. A.³,Ryzhenenkov A. E.³,Tolmachev S. S.⁴,Fedotovich G. V.³,Shemyakin D. N.³,Shoukavy D. V.¹,Epshteyn L. B.⁵

Affiliation:

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

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

3. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences; Novosibirsk State University

4. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sсiences

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

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.

Publisher

Publishing House Belorusskaya Nauka

Subject

General Medicine

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