| Autor: |
V. I. Galkin, V.N. Kulikov, R. A. Mukhamedshin, V. S. Puchkov, S. E. Pyatovsky, M. G. Kogan, A. V. Vargasov, S. I. Nazarov, A. S. Borisov, A. P. Chubenko, Z. M. Guseva, A. E. Morozov, V. G. Denisova, G. P. Shoziyoev, M. D. Smirnova, E. A. Kanevskaya |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
EPJ Web of Conferences, Vol 99, p 10004 (2015) |
| Popis: |
The origin of the cosmic ray hadron excess observed in a deep uniform lead X-ray emulsion chamber (XREC) at depths larger than 70 radiation lengths is analyzed. We present preliminary experimental data on the absorption of cosmic ray hadrons in the two-storey XREC with a large air gap exposed at the Tien Shan mountains. The design of the chamber was especially invented to prove the hypothesis on a substantial increase of the charm particle production cross section with energy at ELab ∼ 75 TeV as the main source of the darkness spot excess observed on X-ray films. Experimental data obtained with both a 2-storey XREC and a deep uniform XREC are compared with simulation results calculated with the FANSY 1.0 model. The comparison reveals a qualitative agreement between experimental and simulated data under the assumption of high values of charm particle production cross section at ELab ∼ 75 TeV in the forward kinematic region at xLab > 0.1. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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