Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Study of the Process e+e− → ηπ0γ in the Cossision-Energy Range of √s=1.05−2.00 GeV. / Achasov, M. N.; Barnyakov, A. Yu; Baykov, A. A. и др.
в: Physics of Atomic Nuclei, Том 84, № 2, 12, 03.2021, стр. 197-200.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - Study of the Process e+e− → ηπ0γ in the Cossision-Energy Range of √s=1.05−2.00 GeV
AU - Achasov, M. N.
AU - Barnyakov, A. Yu
AU - Baykov, A. A.
AU - Beloborodov, K. I.
AU - Berdyugin, A. V.
AU - Bogdanchikov, A. G.
AU - Botov, A. A.
AU - Golubev, V. B.
AU - Dimova, T. V.
AU - Druzhinin, V. P.
AU - Zhabin, V. N.
AU - Kardapoltsev, L. V.
AU - Kovrizhin, D. P.
AU - Korol, A. A.
AU - Kupich, A. S.
AU - Martin, K. A.
AU - Melnikova, N. A.
AU - Muchnoi, N. Yu
AU - Obrazovsky, A. E.
AU - Pakhtusova, E. V.
AU - Pugachev, K. V.
AU - Savchenko, Ya S.
AU - Serednyakov, S. I.
AU - Silagadze, Z. K.
AU - Surin, I. K.
AU - Usov, Yu V.
AU - Kharlamov, A. G.
AU - Shtol, D. A.
N1 - Publisher Copyright: © 2021, Pleiades Publishing, Ltd. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - The process e+e− → ηπ0γ is studied in the range of center-of-mass (c.m.) collision energies between 1.05 and 2.00 GeV on the basis of data corresponding to an integrated luminosity of 94.5 pb-1 that were accumulated in an experiment with the SND detector at the VEPP-2000 e+e− collider. The cross section for this process was measured for the first time and was found to receive a dominant contribution from the mechanism of a transition through an ωη intermediate state. The cross section measured for the process e+e− → ωη → ηπ0γ agrees with the results of earlier measurements in the channel e+e− → π+π−π0η. At a level of 5.7 standard deviations (5.7 σ), it is established that the process e+e− → ηπ0γ is not fully described by hadronic intermediate states of the VP type. The cross section was measured for this missing contribution, which may be generated by radiative processes—for example, e+e− → a0(1450)γ. It ranges from 15 to 20 pb over a broad energy interval extending from 1.3 to 1.9 GeV.
AB - The process e+e− → ηπ0γ is studied in the range of center-of-mass (c.m.) collision energies between 1.05 and 2.00 GeV on the basis of data corresponding to an integrated luminosity of 94.5 pb-1 that were accumulated in an experiment with the SND detector at the VEPP-2000 e+e− collider. The cross section for this process was measured for the first time and was found to receive a dominant contribution from the mechanism of a transition through an ωη intermediate state. The cross section measured for the process e+e− → ωη → ηπ0γ agrees with the results of earlier measurements in the channel e+e− → π+π−π0η. At a level of 5.7 standard deviations (5.7 σ), it is established that the process e+e− → ηπ0γ is not fully described by hadronic intermediate states of the VP type. The cross section was measured for this missing contribution, which may be generated by radiative processes—for example, e+e− → a0(1450)γ. It ranges from 15 to 20 pb over a broad energy interval extending from 1.3 to 1.9 GeV.
UR - http://www.scopus.com/inward/record.url?scp=85105473810&partnerID=8YFLogxK
UR - https://www.elibrary.ru/item.asp?id=46047215
U2 - 10.1134/S1063778821010038
DO - 10.1134/S1063778821010038
M3 - Article
AN - SCOPUS:85105473810
VL - 84
SP - 197
EP - 200
JO - Physics of Atomic Nuclei
JF - Physics of Atomic Nuclei
SN - 1063-7788
IS - 2
M1 - 12
ER -
ID: 28551319