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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

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

<a href="/en/project/GA24-12702S" target="_blank" >GA24-12702S: Experimental and theoretical studies of astrophysical high-energy neutrinos in KM3NeT neutrino telescopes</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Name of the periodical

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

ISSN

1475-7516

e-ISSN

—

Volume of the periodical

2025

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

20

Pages from-to

1-20

UT code for WoS article

001458224900001

EID of the result in the Scopus database

2-s2.0-105000746179