PoS - Proceedings of Science
Volume 282 - 38th International Conference on High Energy Physics (ICHEP2016) - Poster Session
Charm production nearby threshold in pA-interactions at 70 GeV
E.S. Kokoulina,* E. Ardashev, A.G. Afonin, V. Balandin, G. Bogdanova, M. Bogolyubsky, O.P. Gavrishchuk, S. Golovnia, S. Gorokhov, V. Golovkin, D. Karmanov, A. Kiryakov, V. Kramarenko, A. Leopold, Y. Petukhov, A. Pleskach, V. Popov, V. Riadovikov, V. Ronjin, I. Rufanov, Y. Tsyupa, V. Volkov, A. Vorobiev, A. Voronin, A. Yukaev, V. Zapolsky, E. Zverev
*corresponding author
Full text: pdf
Pre-published on: February 06, 2017
Published on: April 19, 2017
he 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.
DOI: https://doi.org/10.22323/1.282.0720
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