Observation of an ultra-high-energy cosmic neutrino with KM3NeT

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00384165" target="_blank" >RIV/68407700:21670/25:00384165 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1038/s41586-024-08543-1" target="_blank" >https://doi.org/10.1038/s41586-024-08543-1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41586-024-08543-1" target="_blank" >10.1038/s41586-024-08543-1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Observation of an ultra-high-energy cosmic neutrino with KM3NeT

Popis výsledku v původním jazyce

The detection of cosmic neutrinos with energies above a teraelectronvolt (TeV) offers a unique exploration into astrophysical phenomena1,2,3. Electrically neutral and interacting only by means of the weak interaction, neutrinos are not deflected by magnetic fields and are rarely absorbed by interstellar matter: their direction indicates that their cosmic origin might be from the farthest reaches of the Universe. High-energy neutrinos can be produced when ultra-relativistic cosmic-ray protons or nuclei interact with other matter or photons, and their observation could be a signature of these processes. Here we report an exceptionally high-energy event observed by KM3NeT, the deep-sea neutrino telescope in the Mediterranean Sea4, which we associate with a cosmic neutrino detection. We detect a muon with an estimated energy of petaelectronvolts (PeV). In light of its enormous energy and near-horizontal direction, the muon most probably originated from the interaction of a neutrino of even higher energy in the vicinity of the detector. The cosmic neutrino energy spectrum measured up to now5,6,7 falls steeply with energy. However, the energy of this event is much larger than that of any neutrino detected so far. This suggests that the neutrino may have originated in a different cosmic accelerator than the lower-energy neutrinos, or this may be the first detection of a cosmogenic neutrino8, resulting from the interactions of ultra-high-energy cosmic rays with background photons in the Universe.

Název v anglickém jazyce

Observation of an ultra-high-energy cosmic neutrino with KM3NeT

Popis výsledku anglicky

The detection of cosmic neutrinos with energies above a teraelectronvolt (TeV) offers a unique exploration into astrophysical phenomena1,2,3. Electrically neutral and interacting only by means of the weak interaction, neutrinos are not deflected by magnetic fields and are rarely absorbed by interstellar matter: their direction indicates that their cosmic origin might be from the farthest reaches of the Universe. High-energy neutrinos can be produced when ultra-relativistic cosmic-ray protons or nuclei interact with other matter or photons, and their observation could be a signature of these processes. Here we report an exceptionally high-energy event observed by KM3NeT, the deep-sea neutrino telescope in the Mediterranean Sea4, which we associate with a cosmic neutrino detection. We detect a muon with an estimated energy of petaelectronvolts (PeV). In light of its enormous energy and near-horizontal direction, the muon most probably originated from the interaction of a neutrino of even higher energy in the vicinity of the detector. The cosmic neutrino energy spectrum measured up to now5,6,7 falls steeply with energy. However, the energy of this event is much larger than that of any neutrino detected so far. This suggests that the neutrino may have originated in a different cosmic accelerator than the lower-energy neutrinos, or this may be the first detection of a cosmogenic neutrino8, resulting from the interactions of ultra-high-energy cosmic rays with background photons in the Universe.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA24-12702S" target="_blank" >GA24-12702S: Experimentální a teoretický výzkum astrofyzikálních vysokoenergetických neutrin v neutrinovém teleskopu KM3NeT</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Nature

ISSN

0028-0836

e-ISSN

1476-4687

Svazek periodika

638

Číslo periodika v rámci svazku

8050

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

376-382

Kód UT WoS článku

001427012000001

EID výsledku v databázi Scopus

2-s2.0-85218619029