On the Dominant Role of Charm Production in the Forward Kinematic Region According to Cosmic-Ray Experiments
- Authors: Borisov A.S.1, Denisova V.G.1, Galkin V.I.2, Guseva Z.M.1, Kanevskaya E.A.1, Kogan M.G.1, Mukhamedshin R.A.3, Nazarov S.I.2, Puchkov V.S.1, Sadykov T.4
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Affiliations:
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences
- Institute of Nuclear Physics
- Institute for Nuclear Research of the Russian Academy of Sciences
- Institute of Physics and Technology
- Issue: Vol 82, No 6 (2019)
- Pages: 827-833
- Section: Elementary Particles and Fields
- URL: https://journals.rcsi.science/1063-7788/article/view/195087
- DOI: https://doi.org/10.1134/S1063778819660098
- ID: 195087
Cite item
Abstract
A phenomenon of abnormally weak absorption of very-high-energy cosmic-ray hadrons in lead is discussed. This phenomenon was first observed in Tien-Shan high-altitude experiments in hadronic cores of extensive air showers and has encouraged to introduce the hypothesis of a so-called long-flying or penetrating cosmic-ray component. A similar effect was detected later with deep uniform lead X-ray emulsion chambers (XREC) at the Pamirs. Experiments, which are sensitive to the production of charmed hadrons in the forward kinematic region (xLab ≳ 0.1), have been carried out at the Tien-Shan and Pamirs with exposing two-storey XRECs with large air gaps to prove explanation of the experimental results with high charm production cross section \({\sigma _{pp \to c\bar c}} \sim 8\) at xLab ≳ 0.1 at ⟨ELab⟩ ∼ 75 TeV. This \({\sigma _{pp \to c\bar c}}\) value makes it possible to reproduce the experimental hadron-absorption curve observed with XRECs, including curve’s bending at a depth of ∼70 c.u.
About the authors
A. S. Borisov
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Author for correspondence.
Email: asborisov55@mail.ru
Russian Federation, Moscow
V. G. Denisova
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Email: asborisov55@mail.ru
Russian Federation, Moscow
V. I. Galkin
Institute of Nuclear Physics
Email: asborisov55@mail.ru
Russian Federation, Moscow
Z. M. Guseva
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Email: asborisov55@mail.ru
Russian Federation, Moscow
E. A. Kanevskaya
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Email: asborisov55@mail.ru
Russian Federation, Moscow
M. G. Kogan
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Email: asborisov55@mail.ru
Russian Federation, Moscow
R. A. Mukhamedshin
Institute for Nuclear Research of the Russian Academy of Sciences
Email: asborisov55@mail.ru
Russian Federation, Moscow
S. I. Nazarov
Institute of Nuclear Physics
Email: asborisov55@mail.ru
Russian Federation, Moscow
V. S. Puchkov
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Email: asborisov55@mail.ru
Russian Federation, Moscow
T. Sadykov
Institute of Physics and Technology
Email: asborisov55@mail.ru
Kazakhstan, Almaty
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