A Data-driven heavy-metal scenario for Ultra-High-Energy Cosmic Rays
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00644304" target="_blank" >RIV/68378271:_____/25:00644304 - isvavai.cz</a>
Result on the web
<a href="https://pos.sissa.it/501/430/pdf" target="_blank" >https://pos.sissa.it/501/430/pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.501.0430" target="_blank" >10.22323/1.501.0430</a>
Alternative languages
Result language
angličtina
Original language name
A Data-driven heavy-metal scenario for Ultra-High-Energy Cosmic Rays
Original language description
The mass composition of ultra-high-energy cosmic rays (UHECRs) is usually inferred from the depth of the shower maximum (Xmax) of cosmic-ray showers, which is only ambiguously determined by modern hadronic interaction models. We present a data-driven interpretation of UHECRs, the heavy-metal scenario, which assumes pure iron nuclei above 1019.6 eV (≈40 EeV) as the heaviest observed mass composition and introduces a global shift in the Xmax scale predicted by the two hadronic interaction models QGSJet II-04 and Sibyll 2.3d. We investigate the consequences of the proposed mass-composition model based on the obtained shifts in the Xmax values, which naturally lead to a heavier mass composition of UHECRs than conventionally assumed. We explore the consequences of our model on the energy evolution of relative fractions of primary species, consequently decomposed energy spectrum, hadronic-interaction studies and the arrival directions of UHECRs. We show that within this scenario, presented recently in [ApJL 986 L34], the cosmic-ray measurements can be interpreted in a more consistent way.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of Science
ISBN
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ISSN
1824-8039
e-ISSN
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Number of pages
8
Pages from-to
430
Publisher name
Sissa Medilab srl
Place of publication
Trieste
Event location
Ženeva
Event date
Jul 15, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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