Summary of experiments with the neutral detector at the e+e− storage ring VEPP-2M

First observation of φ(1020)→π0π0γ decay

“…This efficiency was used in the fitting of the φ-resonance excitation curve. The visible cross section in each energy point σ vis (s) was described as a sum of the processes (1), (2), and (3) with efficiency and radiative corrections taken into account for each process. The background cross section due to the process (3) was estimated by fitting the visible cross section of the events of the ωπ 0 type with linear function.…”

“…First search for φ → π 0 π 0 γ decay was carried out with the ND detector at VEPP-2M e + e − collider in 1987 [1,2]. In this early experiment the upper limit B(φ → π o π o γ) < 10 −3 was placed.…”

Search for short strings ine+e−-annihilation

“…Whereas there are different annihilation channels data obtained from different detectors, we fit every channel separately and find the formula for full cross section. The analysis is performed using the data on e + e − -annihilation to pion channels: e + e − → π + π − (CMD and OLYA detectors) [8], e + e − → 2π + 2π − (M3N, GG2, DM1, CMD, OLYA, DM2, SND, CMD2, SND, BaBar) [9][10][11][12][13][14][15][16][17][18][19], e + e − → π + π − 2π 0 (OLYA, CMD2, SND, DM2, Frascati-ADONE-GAMMA-GAMMA-2) [20][21][22][23][24][25], e + e − → 3π + 3π − (BaBar) [26], e + e − → 2π + 2π − 2π 0 (BaBar) [26].…”

Study of the process e+e−→ηγ in c.m. energy range 600–1380 MeV at CMD-2

“…The data samples of the ηγ production accumulated previously in the off-resonance region are negligible [7] making impossible the determination of the cross section of the process e + e − → ηγ which although small could contribute to the total hadronic cross section and thus influence the precision of the calculation of the hadronic contribution to (g-2) µ [8].…”