Abstract
Charmed-particle production in pp interactions at 70 GeV/c was studied with the SVD setup at the IHEP accelerator (Protvino). The experimental procedure used and the data-selection methods are described. Data obtained by using a quickly cycling bubble chamber and a magnetic spectrometer are analyzed. The number of inelastic-interaction events recorded in the chamber is 109000, with the charge multiplicity being n ch/4. The corresponding statistics are 4.96 event/µb. Part of the events were recorded in the magnetic spectrometer. Three three-prong decays of charged particles near the primary vertex are found on the films, two of these being recorded with the spectrometer. All three are interpreted as D − decays. Two neutral decays observed simultaneously in the chamber and in the spectrometer are interpreted as \(\bar D^0 \) decays. The total cross section for \(c\bar c\) production in the Feynman variable region −1<x F<+1 is estimated at \(\sigma (c\bar c) = 1.6_{ - 0.7}^{ + 1.1} (stat.) \pm 0.3(syst.)\mu b\). The cross-section values and the mean values 〈|x F|〉 and 〈p⊥〉 for D mesons are compared with other experimental results in the energy range 58–800 GeV. The data of this experiment are compatible with the cross-section estimates obtained in the beam-dump experiment at 70 GeV and with those predicted by perturbative QCD.
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Translated from Yadernaya Fizika, Vol. 64, No. 5, 2001, pp. 958–968.
Original Russian Text Copyright © 2001 by Amaglobeli, Ardashev, Basiladze, Bogdanova, Bogolyubsky, Boguslavsky, Bulgakov, Vischnevskaya, Volkov, Vorobiev, Galyaev, Gramenitsky, Grishina, Grishkevich, Ermolov, Zaitseva, Zapolsky, Zverev, Zotkin, Ivanova, Karlov, Kireev, Kiryunin, Kozlov, kramarenko, Kubarovsky, Kuratashvili, Kurchaninov, Kutov, Larichev, Levitsky, Leflat, Lyutov, Medved, Merkin, Minaenko, Moiseev, Nedev, Orfanitsky, Pleskach, A. Popov, V. Popov, Prosin, Ruzin, Rukovichkin, Rybnikov, Ryadovikov, Samsonov, Selikov, Tevzadze, Tikhonova, Tolmachev, Topuria, Utochkin, Kholodenko, Khrenov, Tsyupa, Chekulaev, Chiladze, Shabalina, Shafranov, Esakia.
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Amaglobeli, N.S., Ardashev, E.N., Basiladze, S.G. et al. Experimental estimation of the charm-production cross section in pp interactions at 70 GeV/c with the aid of the SVD setup. Phys. Atom. Nuclei 64, 891–901 (2001). https://doi.org/10.1134/1.1378879
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DOI: https://doi.org/10.1134/1.1378879