Properties of Neutral Charmed Mesons in Proton--Nucleus Interactions at 70 GeV
hep-ex
/ Authors
SVD-2 Collaboration, :, A. N. Aleev, E. N. Ardashev, A. G. Afonin, V. P. Balandin, S. G. Basiladze, S. F. Berezhnev, G. A. Bogdanova, M. Yu. Bogolyubsky
and 43 more authors
A. M. Vishnevskaya, V. Yu. Volkov, A. P. Vorobiev, A. G. Voronin, G. G. Ermakov, P. F. Ermolov, S. N. Golovnia, S. A. Gorokhov, V. F. Golovkin, N. I. Grishin, Ya. V. Grishkevich, V. N. Zapolsky, E. G. Zverev, S. A. Zotkin, D. S. Zotkin, D. E. Karmanov, V. I. Kireev, A. A. Kiriakov, V. N. Kramarenko, A. V. Kubarovsky, N. A. Kouzmine, L. L. Kurchaninov,
/ Abstract
The results of treatment of data obtained in the SERP-E-184experiment "Investigation of mechanisms of the production of charmed particles in proton-nucleus interactions at 70 GeV and their decays" by irradiating the active target of the SVD-2 facility consisting of carbon, silicon, and lead plates, are presented. After separating a signal from the two-particle decay of neutral charmed mesons and estimating the cross section for charm production at a threshold energy σ(cč)=7.1 \pm 2.4(stat.) \pm 1.4(syst.) \mub/nucleon, some properties of D mesons are investigated. These include the dependence of the cross section on the target mass number (its A dependence); the behavior of the differential cross sections dσ/dpt2 and dσ/dxF; and the dependence of the parameter α on the kinematical variables xF, pt2, and plab. The experimental results in question are compared with predictions obtained on the basis of the FRITIOF7.02 code.