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First Physical Results from SND Detector at VEPP-2M | M.N.Achasov
; M.G.Bek
; K.I.Beloborodov
; A.V.Berdyugin
; A.V.Bozhenok
; A.D.Bukin
; D.A.Bukin
; S.V.Burdin
; V.V.Danilov
; T.V.Dimova
; S.I.Dolinsky
; V.P.Druzhinin
; M.S.Dubrovin
; I.A.Gaponenko
; V.B.Golubev
; V.N.Ivanchenko
; P.I.Ivanov
; I.A.Koop
; A.A.Korol
; M.S.Korostelev
; S.V.Koshuba
; A.P.Lysenko
; A.A.Mamutkin
; I.N.Nesterenko
; E.V.Pakhtusova
; E.A.Perevedentsev
; A.A.Polunin
; E.G.Pozdeev
; V.I.Ptitsyn
; E.E.Pyata
; A.A.Salnikov
; A.V.Savchkov
; V.V.Shary
; S.I.Serednyakov
; Yu.M.Shatunov
; V.A.Sidorov
; Z.K.Silagadze
; A.N.Skrinsky
; Yu.V.Usov
; A.A.Valishev
; A.V.Varganov
; A.V.Vasiljev
; Yu.S.Velikzhanin
; | Date: |
21 Oct 1997 | Subject: | hep-ex | Abstract: | The paper describes experiments with the SND detector at VEPP-2M collider, carried out during the period from October 1995 until June 1997. The total integrated luminosity of 6.4 pb^{-1} was collected in the energy range 2E=0.4-1.4 GeV (MHAD97 experiment), corresponding to 4*10^5 mu^+ mu^- pairs produced. Preliminary results of the 1996 phi-meson experiment (FI96) are presented. The total number of phi-mesons produced is 4*10^6. New data on rare decays of phi and eta (550) mesons, in particular B(phi -> eta gamma) = (1.30+-0.06+-0.07)%, B(phi -> pi^0 pi^0 gamma) = (1.1+-0.2)*10^{-4}, (M_{pi^0 pi^0} > 800 MeV), B(phi -> f^0 gamma) = (4.7+-1.0)*10^{-4}, B(phi -> eta pi^0 gamma) = (1.3+-0.5)*10^{-4}, B(phi -> eta’ gamma) < 1.7*10^{-4}, B(phi -> 2 pi^0 ) < 6*10^{-4} were obtained. | Source: | arXiv, hep-ex/9710017 | Services: | Forum | Review | PDF | Favorites |
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