Seasonal variation of the atmospheric muon flux in the KM3NeT detectors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F24%3A00381638" target="_blank" >RIV/68407700:21670/24:00381638 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.22323/1.444.0355" target="_blank" >https://doi.org/10.22323/1.444.0355</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22323/1.444.0355" target="_blank" >10.22323/1.444.0355</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Seasonal variation of the atmospheric muon flux in the KM3NeT detectors

Popis výsledku v původním jazyce

KM3NeT is constructing two large volume water Cherenkov detectors in the Mediterranean Sea. By instrumenting the water with photo-multipliers, neutrinos can be detected through the Cherenkov light from charged products of their interactions. The dominating signal, however, comes from muons created in extensive air-showers resulting from cosmic ray interactions in the top of the atmosphere. Despite the water column above, the highest-energy muons (> TeV) reach the detectors. Air-showers develop in a non-isotropic atmosphere where the vertical temperature profile, and thus the density, varies over time. The changing density of the atmosphere affects the balance between interaction and decay (to muons) of mesons in the air-showers. Therefore, the muon flux is expected to correlate with the seasons and short-term temperature fluctuations, as confirmed by other experiments. In this contribution, we present a first measurement of the correlation of the detected muon rate with the effective atmospheric temperature (weighted by muon production spectrum and detector response) for the KM3NeT ORCA telescope. The measured rate is compared with simulations, which model the time-dependent detector efficiency and environmental factors for a constant atmospheric muon flux.

Název v anglickém jazyce

Seasonal variation of the atmospheric muon flux in the KM3NeT detectors

Popis výsledku anglicky

KM3NeT is constructing two large volume water Cherenkov detectors in the Mediterranean Sea. By instrumenting the water with photo-multipliers, neutrinos can be detected through the Cherenkov light from charged products of their interactions. The dominating signal, however, comes from muons created in extensive air-showers resulting from cosmic ray interactions in the top of the atmosphere. Despite the water column above, the highest-energy muons (> TeV) reach the detectors. Air-showers develop in a non-isotropic atmosphere where the vertical temperature profile, and thus the density, varies over time. The changing density of the atmosphere affects the balance between interaction and decay (to muons) of mesons in the air-showers. Therefore, the muon flux is expected to correlate with the seasons and short-term temperature fluctuations, as confirmed by other experiments. In this contribution, we present a first measurement of the correlation of the detected muon rate with the effective atmospheric temperature (weighted by muon production spectrum and detector response) for the KM3NeT ORCA telescope. The measured rate is compared with simulations, which model the time-dependent detector efficiency and environmental factors for a constant atmospheric muon flux.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/LM2023063" target="_blank" >LM2023063: Podzemní laboratoř LSM - účast České republiky</a><br>

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 statě ve sborníku

38th International Cosmic Ray Conference

ISBN

—

ISSN

1824-8039

e-ISSN

1824-8039

Počet stran výsledku

10

Strana od-do

1-10

Název nakladatele

SISSA-The International School for Advanced Studies

Místo vydání

Trieste

Místo konání akce

Nagoya

Datum konání akce

26. 7. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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