On the Possibility of Experimental Study of Rare -, -,
and '-Meson Decays with the U-70 Accelerator

A. V. Artamonov, A. A. Aseev, A. M. Blik, M. Yu. Bogolyubsky,
G. I. Britvich, S. V. Erin, M. O. Lobanov, N. G. Minaev, S. A. Sadovsky,
V. D. Samoilenko, V. I. Suzdalev, P. A. Semenov, V. V. Tikhonov, and Yu. V. Kharlov

State Research Center of the Russian Federation, Institute for High Energy Physics,
ul. Pobedy 1, Protvino, Moscow oblast, 142281, Russia

Received May 22, 2000

Abstract—We consider potential experiments at the U-70 accelerator (Institute for High Energy Physics, Pro-
tvino) on the search and study of rare neutral -, -, and '-meson decays that are critical for the modern theory,
at a qualitatively new level of statistical accuracy. A special setup with the use of meson tagging and electro-
magnetic calorimetry on PbWO₄ crystals is offered for this experiment. The neural net approach was invoked
at the stage of data processing. The Monte Carlo simulation of the experiment demonstrated its high sensitivity
to rare-decay detection, which far exceeds the existing world results.

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