New results of measurement of cross sections for electron-positron annihilation to hadrons with the SND detector at VEPP-2000

Journal Article · Mon Jun 15 04:00:00 EDT 2015 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778815030023· OSTI ID:22722859

Aulchenko, V. M.; Achasov, M. N. ^[1]; Barnyakov, A. Yu. ^[2]; Beloborodov, K. I.; Berdyugin, A. V.; Berkaev, D. E.; Bogdanchikov, A. G.; Botov, A. A.; Vasiljev, A. V.; Golubev, V. B.; Dimova, T. V.; Druzhinin, V. P.; Kardapoltsev, L. V.; Kasaev, A. S.; Kirpotin, A. N.; Kovrizhin, D. P.; Koop, I. A.; Korol, A. A.; Koshuba, S. V.; Kupich, A. S. ^[1] ; others, and

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1. Russian Academy of Sciences, Budker Institute of Nuclear Physics, Siberian Branch (Russian Federation)
2. Novosibirsk State University (Russian Federation)

A survey of preliminary results of experiments with the SND detector at the VEPP-2000 e{sup +}e{sup −} collider in the energy range of √s = 1000–2000 MeV MeV is presented. The cross sections for the processes e{sup +}e{sup −} → π{sup 0}π{sup 0}γ, e{sup +}e{sup −} → π{sup +}π{sup −}π{sup 0}π{sup 0}, e{sup +}e{sup −} → π{sup +}π{sup −}π{sup 0}, e{sup +}e{sup −} → π{sup +}π{sup −}η, and e{sup +}e{sup −} → pp̄ were measured. The measured cross sections agree with the results of earlier measurements but have a higher precision. The cross section for the process e{sup +}e{sup −} → ηγ in the energy range extending from 1.4 to 2 GeV was measured for the first time. The ratio G{sub E}/G{sub M} for the neutron was measured for the first time in the timelike region.

• OSTI ID: 22722859
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 4 Vol. 78; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ACCURACY
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
GEV RANGE
HADRONS
MEV RANGE
NEUTRONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
STORAGE RINGS