Search for quantum decoherence in neutrino oscillations with six detection units of KM3NeT/ORCA

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00384168" target="_blank" >RIV/68407700:21670/25:00384168 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1475-7516/2025/03/039" target="_blank" >https://doi.org/10.1088/1475-7516/2025/03/039</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1475-7516/2025/03/039" target="_blank" >10.1088/1475-7516/2025/03/039</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for quantum decoherence in neutrino oscillations with six detection units of KM3NeT/ORCA

Popis výsledku v původním jazyce

Neutrinos described as an open quantum system may interact with the environment which introduces stochastic perturbations to their quantum phase. This mechanism leads to a loss of coherence along the propagation of the neutrino - a phenomenon commonly referred to as decoherence - and ultimately, to a modification of the oscillation probabilities. Fluctuations in space-time, as envisaged by various theories of quantum gravity, are a potential candidate for a decoherence-inducing environment. Consequently, the search for decoherence provides a rare opportunity to investigate quantum gravitational effects which are usually beyond the reach of current experiments. In this work, quantum decoherence effects are searched for in neutrino data collected by the KM3NeT/ORCA detector from January 2020 to November 2021. The analysis focuses on atmospheric neutrinos within the energy range of a few GeV to 100 GeV. Adopting the open quantum system framework, decoherence is described in a phenomenological manner with the strength of the effect given by the parameters Γ21 and Γ31. Following previous studies, a dependence of the type Γ ij ∝ (E/E 0) n on the neutrino energy is assumed and the cases n = -2,-1 are explored. No significant deviation with respect to the standard oscillation hypothesis is observed. Therefore, 90% CL upper limits are estimated as Γ21 < 4.6. 1021GeV and Γ31 < 8.4. 1021GeV for n = -2 and Γ21 < 1.9. 10-22GeV and Γ31 < 2.7. 10-22GeV for n = -1, respectively.

Název v anglickém jazyce

Search for quantum decoherence in neutrino oscillations with six detection units of KM3NeT/ORCA

Popis výsledku anglicky

Neutrinos described as an open quantum system may interact with the environment which introduces stochastic perturbations to their quantum phase. This mechanism leads to a loss of coherence along the propagation of the neutrino - a phenomenon commonly referred to as decoherence - and ultimately, to a modification of the oscillation probabilities. Fluctuations in space-time, as envisaged by various theories of quantum gravity, are a potential candidate for a decoherence-inducing environment. Consequently, the search for decoherence provides a rare opportunity to investigate quantum gravitational effects which are usually beyond the reach of current experiments. In this work, quantum decoherence effects are searched for in neutrino data collected by the KM3NeT/ORCA detector from January 2020 to November 2021. The analysis focuses on atmospheric neutrinos within the energy range of a few GeV to 100 GeV. Adopting the open quantum system framework, decoherence is described in a phenomenological manner with the strength of the effect given by the parameters Γ21 and Γ31. Following previous studies, a dependence of the type Γ ij ∝ (E/E 0) n on the neutrino energy is assumed and the cases n = -2,-1 are explored. No significant deviation with respect to the standard oscillation hypothesis is observed. Therefore, 90% CL upper limits are estimated as Γ21 < 4.6. 1021GeV and Γ31 < 8.4. 1021GeV for n = -2 and Γ21 < 1.9. 10-22GeV and Γ31 < 2.7. 10-22GeV for n = -1, respectively.

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

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

ISSN

1475-7516

e-ISSN

—

Svazek periodika

2025

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

20

Strana od-do

1-20

Kód UT WoS článku

001458224900001

EID výsledku v databázi Scopus

2-s2.0-105000746179