Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 10637761, EISSN - 10906509, Journal of Experimental and Theoretical Physics, 2008, vol. 107, p. 61-68

Measurement of the ω, ρ → π0 e + e - Branching fractions

Achasov M. N., Beloborodov K. I., Berdyugin A. V., Bogdanchikov A. G., Bukin A. D., Bukin D. A., Vasil'Ev A. V., Golubev V. B., Dimova T. V., Druzhinin V. P., Koop I. A., Korol' A. A., Koshuba S. V., Pakhtusova E. V., Perevedentsev E. A., Serednyakov S. I., Silagadze Z. K., Skrinsky A. N., Shatunov Yu M.

The e + e - → ω, ρ → π0 e + e - processes have been investigated in the experiments with Spherical Neutral Detector at the VEPP-2M e + e - collider. The measurements provide the probability B(ω → π0 e + e -) = (0.761 ± 0.053 ± 0.064) × 10-3 of the ω → π0 e + e g- conversion decay and the upper limit B(ρ → π0 e + e -) < 1.2 × 10 -5 (at 90% CL) for the ρ → π0 e + e - decay. The transition form factor was measured at three values of the 4-momentum transfer squared. © 2008 Pleiades Publishing, Ltd.