Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1984, vol. 137, p. 272-276

A high precision measurement of the Υ{hooked}, Υ{hooked}′ and Υ{hooked}″-meson masses

Artamonov A. S., Baru S. E., Blinov A. E., Bondar A. E., Bukin A. D., Groshiev V. R., Eidelman Yu I., Inozemtsev N. I., Kiselev V. A., Klimenko S. G., Kuper E. A., Mishnev S. I., Nikitin S. A., Onuchin A. P., Panin V. S., Petrov V. V., Protopopov I. Ya, Shamov A. G., Sidorov V. A., Skrinsky A. N., Tayursky V. A., Telnov V. I., Temnykh A. B., Tikhonov Yu A., Tumaikin G. M., Undrus A. E., Vorobiov A. I., Yurkov A. I., Zholents A. A.

An experiment has been performed at the storage ring VEPP-4 using the MD-1 detector. The resonance depolarization method has been employed for the absolute calibration of the beam energy. This has allowed the accuracy of the mass measurement to be improved by a factor of ten. The following mass values of Υ{hooked}, Υ{hooked}′ and Υ{hooked}″ -mesons have been obtained: M(Υ{hooked})=9460.6±0.4 MeV, M(Υ{hooked}′)=10023.8±0.5 MeV, M(Υ{hooked}″)=10355.5±0.5 MeV. © 1984.