Study of the $ρ$, $ω$, $ϕ\toηγ\to 7γ$ Decays with an SND Detector on a VEPP-2M Collider

Achasov, M. N.; Baru, S. E.; Beloborodov, K. I.; Berdyugin, A. V.; Bozhenok, A. V.; Bogdanchikov, A. G.; Bukin, D. A.; Burdin, S. V.; Vasiljev, A. V.; Velikzhanin, Yu. S.; Dimova, T. V.; Druzhinin, V. P.; Dubrovin, M. S.; Ganyushin, D. I.; Gaponenko, I. A.; Golubev, V. B.; Ivanchenko, V. N.; Koop, I. A.; Korol, A. A.; Koshuba, S. V.; Kukartsev, G. A.; Pakhtusova, E. V.; Salnikov, A. A.; Serednyakov, S. I.; Shary, V. V.; Shatunov, Yu. M.; Sidorov, V. A.; Silagadze, Z. K.

Study of the $ρ$, $ω$, $ϕ\toηγ\to 7γ$ Decays with an SND Detector on a VEPP-2M Collider

Authors

Description

The $e^+e^-\toηγ\to 7γ$ process was studied in the energy range $2E=600÷1060$ MeV with an SND detector on a VEPP-2M $e^+e^-$ collider. The decay branching ratios $B(ϕ\toηγ)=(1.343\pm 0.012\pm 0.055)\cdot 10^{-2}$, $B(ω\toηγ)=(4.60\pm 0.72\pm 0.19)\cdot 10^{-4}$, and $B(ρ\toηγ)=(2.69\pm 0.32\pm 0.16)\cdot 10^{-4}$ were measured.
5 pages, 4 figures