Speaker
Mr
Vasilii Riadovikov
(IHEP, Protvino, Russia)
Description
The results of analysis for SERP-E-184 (SVD-2 Collaboration) experiment data (5*10^7 inelastic events) obtained with 70 GeV proton beam irradiation of active target with carbon, silicon and lead plates are presented. For two-prongs neutral and three-prongs charged charmed mesons decays, event selection criteria were developed and detection efficiencies were calculated with detailed modeling using FRITIOF7.02 и GEANT3.21 programs. Signals of decays were obtained. Evaluation for charm production cross section at threshold energy is presented:
σ(cĉ) = 7.1 ± 2.4(stat.) ± 1.4(syst.)(µb/nucleon).
Charm production inclusive cross sections were estimated too:
σ(D0) = 2.5 ± 0.8(stat.) ± 0.5(syst.) (μb/nucleon),
σ(Ď0) = 4.6 ± 1.6(stat.) ± 0.9(syst.) (μb/nucleon),
σ(D+) = 1.2 ± 0.4(stat.) ± 0.2(syst.) (µb/nucleon),
σ(D-) = 1.9 ± 0.6(stat.) ± 0.4(syst.) (µb/nucleon).
A-dependencies of cross sections were measured (α(D0)=1.08±0.12, α(D+)=1.02±0.26, α(D-)=1.04±0.27). Yields of D-mesons and their ratios in comparison with data of other experiments and theoretical predictions are presented.
Author
Mr
Vasilii Riadovikov
(IHEP, Protvino, Russia)
