A.A. Botov

Study of e+e-→ωπ0→π0π0γ in the energy range 1.05-2.00 GeV with the SND detector

The cross section for the process e+e- --> omega pi0 --> pi0 pi0 gamma has been measured in the energy range 1.05--2.00 GeV. The experiment has been performed at the e+e- collider VEPP-2000 with the SND detector. The measured e+e- --> omega pi0 cross section above 1.4 GeV is the most accurate to date. Below 1.4 GeV our data are in good agreement with the previous SND and CMD-2 measurements. Data on the e+e- --> omega pi0 cross section are well described by the VMD model with two excited rho-like states. From the measured cross section we have extracted the gamma^* --> omega pi0 transition form factor. It has been found that the VDM model cannot describe simultaneously our data and data obtained from the omega --> pi0 mu+ mu- decay. We have also tested CVC hypothesis comparing our results on the e+e- --> omega pi0 cross section with data on the tau- --> omega pi- nu_{tau} decay.

Study of the processe+e−→nn¯at the VEPP-2000e+e−collider with the SND detector

The process

Search for the

e^+e^-\to n\bar{n}

\eta^{\prime}\to e^+e^-

has been studied at the VEPP-2000

decay with the SND detector

e^+e^-

Updated measurement of the

collider with the SND detector in the energy range from threshold up to 2 GeV. As a result of the experiment, the

e^+e^- \to \omega \pi^0 \to \pi^0\pi^0\gamma

e^+e^-\to n\bar{n}

cross section with the SND detector

cross section and effective neutron form factor have been measured.

Study of the processe+e−→ωηπ0in the energy ranges<2GeVwith the SND detector

A search for the process

Measurement of the

e^+e^- \to \eta^\prime