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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Ukrainian Journal of Physics

ISSN

2071-0186

e-ISSN

2071-0194

Svazek periodika

69

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

UA - Ukrajina

Počet stran výsledku

6

Strana od-do

786-791

Kód UT WoS článku

001412561200001

EID výsledku v databázi Scopus

2-s2.0-85211590090