Achasov, M.N.
E+ E- --> PHI
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Experimental study of the processes e+ e- --> phi --> eta gamma, pi0 gamma at VEPP-2M.

Achasov, M.N. ; Berdyugin, A.V. ; Bozhenok, A.V. ; et al.
Eur.Phys.J.C 12 (2000) 25-33, 2000.
Inspire Record 524221 DOI 10.17182/hepdata.43394

The processes$e^+e^-\rightarrow\eta\gamma, \pi^0\gamma\rightarrow 3\gamma$were studied in the SND experiment at the VEPP-2M collider in the energy region of the

2 data tables
Table 1

Results of energy scan of the cross section.

Table 2

Cross sections for PHI production and decay into the two states from a fit to the data at the peak.


First physical results from SND detector at VEPP-2M.

The SND collaboration Achasov, M.N. ; Beck, M.G. ; Beloborodov, K.I. ; et al.
BUDKER-INP-1997-78, 1997.
Inspire Record 450009 DOI 10.17182/hepdata.50302

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.

4 data tables
Table 1

No description provided.

Table 2

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Table 3

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