Study of the process e+e−→π0π0γ in c.m. energy range 600–970 MeV at CMD-2

pi0 pi0 gamma has been measured in the c.m. energy range 600--970 MeV with the CMD-2 detector. The following branching ratios have been determined: B(rho --> pi0 pi0 gamma) =(5.2^{+1.5}_{-1.3} +- 0.6)x10^{-5} and B(omega --> pi0 pi0 gamma) =(6.4^{+2.4}_{-2.0} +- 0.8)x10^{-5}. Evidence for the rho --> f0(600) gamma decay has been obtained: B(rho --> f0(600) gamma) = (6.0^{+3.3}_{-2.7}\pm 0.9)x10^{-5}. From a search for the process e+ e- --> eta pi0 gamma the following upper limit has been obtained: B(omega --> eta pi0 gamma) < 3.3 10^{-5} at 90% CL.
Comment: 15 pages, 4 figures -->
ISSN: 0370-2693
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc342564593ba7bcec80f4023aab67cb
https://doi.org/10.1016/j.physletb.2003.11.046
Rights: OPEN
Přírůstkové číslo: edsair.doi.dedup.....dc342564593ba7bcec80f4023aab67cb
Autor: Akhmetshin, R.R., Aulchenko, V.M., Banzarov, V.Sh., Baratt, A., Barkov, L.M., Baru, S.E., Bashtovoy, N.S., Bondar, A.E., Bondarev, D.V., Bragin, A.V., Eidelman, S.I., Epifanov, D.A., Fedotovitch, G.V., Gabyshev, N.I., Gorbachev, D.A., Grebeniuk, A.A., Grigoriev, D.N., Ignatov, F.V., Karpov, S.V., Kazanin, V.F., Khazin, B.I., Koop, I.A., Krokovny, P.P., Kuzmin, A.S., Logashenko, I.B., Lukin, P.A., Lysenko, A.P., Mikhailov, K.Yu., Milstein, A.I., Nesterenko, I.N., Okhapkin, V.S., Otboev, A.V., Perevedentsev, E.A., Polunin, A.A., Popov, A.S., Redin, S.I., Root, N.I., Ruban, A.A., Ryskulov, N.M., Shamov, A.G., Shatunov, Yu.M., Shwartz, B.A., Sibidanov, A.L., Sidorov, V.A., Skrinsky, A.N., Snopkov, I.G., Solodov, E.P., Stepanov, P.Yu., Thompson, J.A., Valishev, A.A., Yudin, Yu.V., Zaitsev, A.S., Zverev, S.G.
Rok vydání: 2004
Předmět:
Zdroj: Physics Letters B. 580:119-128
ISSN: 0370-2693
Popis: The cross section of the process e+ e- --> pi0 pi0 gamma has been measured in the c.m. energy range 600--970 MeV with the CMD-2 detector. The following branching ratios have been determined: B(rho --> pi0 pi0 gamma) =(5.2^{+1.5}_{-1.3} +- 0.6)x10^{-5} and B(omega --> pi0 pi0 gamma) =(6.4^{+2.4}_{-2.0} +- 0.8)x10^{-5}. Evidence for the rho --> f0(600) gamma decay has been obtained: B(rho --> f0(600) gamma) = (6.0^{+3.3}_{-2.7}\pm 0.9)x10^{-5}. From a search for the process e+ e- --> eta pi0 gamma the following upper limit has been obtained: B(omega --> eta pi0 gamma) < 3.3 10^{-5} at 90% CL.
Comment: 15 pages, 4 figures
Databáze: OpenAIRE
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