학술논문
Charm production nearby threshold in pA-interactions at 70 GeV
Document Type
Working Paper
Author
Afonin, A.; Ardashev, E.; Balandin, V.; Bogdanova, G.; Bogolyubsky, M.; Gavrishchuk, O.; Golovnia, S.; Gorokhov, S.; Golovkin, V.; Karmanov, D.; Kiryakov, A.; Kokoulina, E.; Kramarenko, V.; Leflat, A.; Petukhov, Yu.; Pleskach, A.; Popov, V.; Riadovikov, V.; Ronjin, V.; Rufanov, I.; Tsyupa, Yu.; Volkov, V.; Vorobiev, A.; Voronin, A.; Yukaev, A.; Zapolsk, V.; Zverev, E.
Source
Subject
Language
Abstract
The results of the SERP-E-184 experiment at the U-70 accelerator (IHEP, Protvino) are presented. Interactions of the 70 GeV proton beam with C, Si and Pb targets were studied to detect decays of charmed $D^0$, $\overline D^0$, $D^+$, $D^-$ mesons and $\Lambda _c^+$ baryon near their production threshold. Measurements of lifetimes and masses are shown a good agreement with PDG data. The inclusive cross sections of charm production and their A-dependencies were obtained. The yields of these particles are compared with the theoretical predictions and the data of other experiments. The measured cross section of the total open charm production ($\sigma _{\mathrm {tot}}(c\overline c)$ = 7.1 $\pm $ 2.3(stat) $\pm $1.4(syst) $\mu $b/nucleon) at the collision c.m. energy $\sqrt {s}$ = 11.8 GeV is well above the QCD model predictions. The contributions of different species of charmed particles to the total cross section of the open charm production in proton-nucleus interactions vary with energy.
Comment: 4 pages, 6 pages, 38th International Conference on High Energy Physics 3-10 August 2016, Chicago, USA
Comment: 4 pages, 6 pages, 38th International Conference on High Energy Physics 3-10 August 2016, Chicago, USA