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IHEP 98 - 44 (in Russian)
M.Yu.Bogolyubsky (IHEP, Protvino, Russia),I.V. Boguslavsky (JINR, Dubna, Russia), A.V. Kubarovsky, L.A. Tikhonova ( INP MSU, Moscow, Russia)
Statistics of Rare Multichannel Processes and the Determination of the Total Charm Cross Section in the Experimet E-161
Protvino, 1998.- p.17, figs. 2, tables 3, refs.:26.

In this work statistics of rare multichannel processes is analysed and the proper formulae are obtained which allow to determe reaction total cross section, estimation error of the result and its confidence level. ̉hese formulae were used in the method to determine of the charm total cross section on the hybrid set-up SVD including precise vertex detector made as hydrogen Rapid Cycled Bubble Chamber (RCBC) and High-Aperture Magnet Spectrometer. The registration efficiencies of different topological charm decay channels for the accepted selection criteria have been found by the Monte-Carlo simulation with the help of programs PYTHIA and GEANT3. The results on cross section estimation have been obtained in the form proportional to the number of registered events.

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