Modified characteristics of hadronic interactions in ultra-high-energy cosmic-ray showers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00617562" target="_blank" >RIV/68378271:_____/24:00617562 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0364462" target="_blank" >https://hdl.handle.net/11104/0364462</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.15407/ujpe69.11.786" target="_blank" >10.15407/ujpe69.11.786</a>

Result language

angličtina

Original language name

Modified characteristics of hadronic interactions in ultra-high-energy cosmic-ray showers

Original language description

Data from multiple experiments suggest that the current interaction models used in Monte Carlo simulations do not correctly reproduce the hadronic interactions in air showers produced by ultra-high-energy cosmic rays (UHECR), in particular but not limited to the production of muons during the showers. We have created a large library of UHECR simulations where the interactions at the highest energies are slightly modified in various ways but always within the constraints of the accelerator data, without any abrupt changes with energy and without assuming any specific mechanism or dramatically new physics at the ultra-high energies. We will find that even when very different properties cross section, elasticity, and multiplicity of the interactions are modified, the resulting changes in some air-shower observables are still mutually correlated. Thus, not all possible combinations of changes of observables are easily reproduced by some combination of the modifications. Most prominently, the recent results of the Pierre Auger Observatory, which call for a change in the prediction of both the muon content at ground and the depth of the maximum of longitudinal development of the showers, are rather difficult to reproduce with such modifications, in particular when accounting for other cosmic-ray data. While some of these results are related to the assumptions we place on the modifications, the overall lessons are general and provide valuable insight into how the UHECR data can be interpreted from the point of view of hadronic physics.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Ukrainian Journal of Physics

ISSN

2071-0186

e-ISSN

2071-0194

Volume of the periodical

69

Issue of the periodical within the volume

11

Country of publishing house

UA - UKRAINE

Number of pages

6

Pages from-to

786-791

UT code for WoS article

001412561200001

EID of the result in the Scopus database

2-s2.0-85211590090