First Observation of PHI(1020)--->PI0+PI0+GAMMA Decay

Achasov, M. N.; Aulchenko, V. M.; Berdyugin, A. V.; Bozhenok, A. V.; Bukin, A. D.; Bukin, D. A.; Burdin, S. V.; Dimova, T. V.; Dolinsky, S. I.; Druzhinin, V. P.; Dubrovin, M. S.; Gaponenko, I. A.; Golubev, V. B.; Ivanchenko, V. N.; Koop, I. A.; Korol, A. A.; Koshuba, S. V.; Pakhtusova, E. V.; Perevedentsev, E. A.; Salnikov, A. A.; Serednyakov, S. I.; Shary, V. V.; Shatunov, Yu. M.; Sidorov, V. A.; Silagadze, Z. K.; Skrinsky, A. N.; Usov, Yu. V.; Velikzhanin, Yu. S.

First Observation of PHI(1020)--->PI0+PI0+GAMMA Decay

Authors

Description

In the SND experiment at the VEPP-2M electron-positron collider the PHI(1020)--->PI0+PI0+GAMMA decay was studied. The branching ratio B(PHI--->PI0+PI0+GAMMA)=(1.14+-0.10+-0.12)x10^{-4} was measured. It was shown, that the F0(980)GAMMA mechanism dominates in this decay and the 4-quark model of F0(980) describes our data most consistently.
6 pages, 6 figures, 1 table, Will be published in Phys.Lett.B