Registration of neutral charmed mesons production and their decays in pA-interactions at 70 GeV with SVD-2 setup

1A. Aleev , E. Ardashev , A. Afonin , V. Balandin , S. Basiladze , S. Berezhnev , G. Bogdanova , M. Bogolyubsky

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V. Ejov G. Ermakov P. Ermolov N. Furmanec S. Golovnia S. Gorokhov V. Golovkin N. Grishin Ya. Grishkevich D. Karmanov A. Kholodenko V. Kireev A. Kiriakov N. Kouzmine V. Konstantinov V. Kramarenko A. Kubarovsky L. Kurchaninov G. Lanshikov A. Leflat S. Lyutov M. Merkin G. Mitrofanov V. Petrov Yu. Petukhov A. Pleskach V. Popov V. Riadovikov V. Ronjin D. Savrina V. Senko N. Shalanda M. Soldatov L. Tikhonova T. Topuria Yu. Tsyupa A. Vischnevskaya V. Volkov A. Vorobiev A. Voronin V. Yakimchuk A. Yukaev V. Zapolsky S. Zotkin D. Zotkin E. Zverev

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classification ✦ hep-ex

keywords mesonscharmeddecaysneutralpresentedproductionregistrationactive

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The results of data handling for E-184 experiment obtained with 70 GeV proton beam irradiation of active target with carbon, silicon and lead plates are presented. Two-prongs neutral charmed D0 and \v{D}0 -mesons decays were selected. Signal / background ratio was (51+/-17) / (38+/-13). Registration efficiency for mesons was defined and evaluation for charm production cross section at threshold energy is presented: sigma(c\^c) = 7.1 +/- 2.4(stat.) +/- 1.4(syst.) (\mu/nucleon).

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Registration of neutral charmed mesons production and their decays in pA-interactions at 70 GeV with SVD-2 setup

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