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Письма в Журнал экспериментальной и теоретической физики, 2008, том 87, выпуск 4, страницы 220–224
(Mi jetpl41)
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Эта публикация цитируется в 61 научных статьях (всего в 62 статьях)
ГРАВИТАЦИЯ, АСТРОФИЗИКА
Muon content of ultra-high-energy air showers: Yakutsk data versus simulations
A. V. Glushkova, I. T. Makarova, M. I. Pravdina, I. E. Sleptsova, D. S. Gorbunovb, G. I. Rubtsovb, S. V. Troitskyb a Shafer Institute of Cosmophysical Research and Aeronomy, Yakutsk, 677980, Russia
b Institute for Nuclear Research, Russian Academy of Sciences, Moscow, 117312, Russia
Аннотация:
We analyse a sample of 33 extensive air showers (EAS) with estimated primary energies above $2\cdot10^{19}$ eV and high-quality muon data recorded by the Yakutsk EAS array. We compare, event-by-event, the observed muon density to that expected from CORSIKA simulations for primary protons and iron, using SIBYLL and EPOS hadronic interaction models. The study suggests the presence of two distinct hadronic components, “light” and “heavy”. Simulations with EPOS are in a good agreement with the expected composition in which the light component corresponds to protons and the heavy component to iron-like nuclei. With SYBILL, simulated muon densities for iron primaries are a factor of $\sim1.5$ less than those observed for the heavy component, for the same electromagnetic signal. Assuming two-component proton-iron composition and the EPOS model, the fraction of protons with energies $E>10^{19}$ eV is $0.52 ^{+0.19}_{-0.20}$ at 95% confidence level.
Поступила в редакцию: 24.01.2008
Образец цитирования:
A. V. Glushkov, I. T. Makarov, M. I. Pravdin, I. E. Sleptsov, D. S. Gorbunov, G. I. Rubtsov, S. V. Troitsky, “Muon content of ultra-high-energy air showers: Yakutsk data versus simulations”, Письма в ЖЭТФ, 87:4 (2008), 220–224; JETP Letters, 87:4 (2008), 190–194
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl41 https://www.mathnet.ru/rus/jetpl/v87/i4/p220
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Страница аннотации: | 349 | PDF полного текста: | 84 | Список литературы: | 57 |
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