High-energy atmospheric muon flux calculations in comparison with recent measurements
| Autor: | A. D. Morozova, A. A. Kochanov, T. S. Sinegovskaya, S. I. Sinegovsky |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
High Energy Astrophysical Phenomena (astro-ph.HE) History Muon Meson Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena Hadron FOS: Physical sciences Cosmic ray Omega Spectral line Computer Science Applications Education Nuclear physics High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Physics::Accelerator Physics High Energy Physics::Experiment Astrophysics - High Energy Astrophysical Phenomena Zenith Lepton |
| Popis: | Recently the atmospheric muon spectra at high energies were reconstructed for two ranges of zenith angles, basing on the events collected with the IceCube detector. These measurements reach high energies at which the contribution to atmospheric muon fluxes from decays of short-lived hadrons is expected. Latest IceCube measurements of the high-energy atmospheric muon spectrum indicate the presence of prompt muon component at energies above 500 TeV. In this work, the atmospheric conventional muon flux in the energy range 10 GeV - 10 PeV is calculated using a set of hadronic models in combination with known parameterizations of the cosmic ray spectrum by Zatsepin $\&$ Sokolskaya and by Hillas $\&$ Gaisser. The calculation of the prompt muons with use of the quark-gluon string model (QGSM) reproduces the muon data of the IceCube experiment. Nevertheless, an additional contribution to the prompt muon component is required to describe the IceCube muon spectra in case if a charm production model predicts the appreciably lower prompt lepton flux as compared with QGSM. This addition, apparently originating from rare decay modes of the short-lived unflavored mesons $\eta, \eta^\prime, \rho, \omega, \phi$, might ensure the competing contribution to the high-energy atmospheric muon flux. Comment: 6 pages, 5 figures. Talk given at 26th Extended European Cosmic Ray Symposium + 35th Russian Cosmic Ray Conference Altai State University, Barnaul / Belokurikha, Russia, July 6 -10, 2018 |
| Databáze: | OpenAIRE |
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