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Decoherence effects in reactor and Gallium neutrino oscillation experiments: a QFT approach

Krueger, Raphael 1; Schwetz, Thomas ORCID iD icon 1
1 Institut für Astroteilchenphysik (IAP), Karlsruher Institut für Technologie (KIT)


We adopt the quantum field theoretical method to calculate the amplitude and event rate for a neutrino oscillation experiment, considering neutrino production, propagation and detection as a single process. This method allows to take into account decoherence effects in the transition amplitude induced by the quantum mechanical uncertainties of all particles involved in the process. We extend the method to include coherence loss due to interactions with the environment, similar to collisional line broadening. In addition to generic decoherence induced at the amplitude level, the formalism allows to include, in a straightforward way, additional damping effects related to phase-space integrals over momenta of unobserved particles as well as other classical averaging effects. We apply this method to neutrino oscillation searches at reactor and Gallium experiments and confirm that quantum decoherence is many orders of magnitudes smaller than classical averaging effects and therefore unobservable. The method used here can be applied with minimal modifications also to other types of oscillation experiments, e.g., accelerator based beam experiments.

Verlagsausgabe §
DOI: 10.5445/IR/1000160743
Veröffentlicht am 11.08.2023
DOI: 10.1140/epjc/s10052-023-11711-8
Zitationen: 4
Web of Science
Zitationen: 4
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1434-6052
KITopen-ID: 1000160743
HGF-Programm 51.13.05 (POF IV, LK 01) Theoretische Astroteilchenphysik
Erschienen in The European Physical Journal C
Verlag Springer-Verlag
Band 83
Heft 7
Seiten Art.-Nr.: 578
Vorab online veröffentlicht am 07.07.2023
Nachgewiesen in arXiv
Web of Science
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