학술논문
Experimental estimation of the charm-production cross section in pp interactions at 70 GeV/c with the aid of the SVD setup
Document Type
Original Paper
Author
Amaglobeli, N. S.; Ardashev, E. N.; Basiladze, S. G.; Bogdanova, G. A.; Bogolyubsky, M. Yu.; Boguslavsky, I. V.; Bulgakov, N. K.; Vischnevskaya, A. M.; Volkov, V. Yu.; Vorobiev, A. P.; Galyaev, N. A.; Gramenitsky, I. M.; Grishina, O. V.; Grishkevich, Ya. V.; Ermolov, P. F.; Zaitseva, O. S.; Zapolsky, V. N.; Zverev, E. G.; Zotkin, S. A.; Ivanova, N. A.; Karlov, G. I.; Kireev, V. I.; Kiryunin, A. E.; Kozlov, V. V.; Kramarenko, V. A.; Kubarovsky, A. V.; Kuratashvili, G. O.; Kurchaninov, L. L.; Kutov, A. Ya.; Larichev, A. N.; Levitsky, M. S.; Leflat, A. K.; Lyutov, S. I.; Medved, K. S.; Merkin, M. M.; Minaenko, A. A.; Moiseev, A. M.; Nedev, S.; Orfanitsky, S. V.; Pleskach, A. V.; Popov, A. I.; Popov, V. V.; Prosin, B. V.; Ruzin, S. M.; Rukovichkin, V. P.; Rybnikov, V. M.; Ryadovikov, V. N.; Samsonov, V. A.; Selikov, A. V.; Tevzadze, Yu. V.; Tikhonova, L. A.; Tolmachev, V. T.; Topuria, T. P.; Utochkin, B. A.; Kholodenko, A. G.; Khrenov, Yu. V.; Tsyupa, Yu. P.; Chekulaev, S. V.; Chiladze, B. G.; Shabalina, E. K.; Shafranov, M. D.; Esakia, Sh. M.
Source
Physics of Atomic Nuclei. May 2001 64(5):891-901
Subject
Language
English
ISSN
1063-7788
1562-692X
1562-692X
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 nch /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 $$\sigma (c\bar c) = 1.6_{ - 0.7}^{ + 1.1} (stat.) \pm 0.3(syst.)\mu b$$. The cross-section values and the mean values 〈|xF |〉 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.