Search for CP-violating neutrino nonstandard interactions with the NOvA experiment

Authors: M. A. Acero, B. Acharya, P. Adamson, Peter Filip, František Hakl, Miloš Lokajíček, Jaroslav Zálešák
Publication year: 2024
Publication type: Článek v odborném periodiku
Periodical: Physical Review Letters
Bibliographic citation: ACERO, M. A., ACHARYA, B., ADAMSON, P., FILIP, Peter, HAKL, František, LOKAJÍČEK, Miloš, ZÁLEŠÁK, Jaroslav. Search for CP-violating neutrino nonstandard interactions with the NOvA experiment. Physical Review Letters. 2024, 133(Nov), 201802. ISSN 0031-9007. E-ISSN 1079-7114
Dostupné z: doi:10.1103/PhysRevLett.133.201802.
DOI: 10.1103/PhysRevLett.133.201802
ID: 601891
Online record: View online record

Abstract

This Letter reports a search for charge-parity (CP) symmetry violating nonstandard interactions (NSI) of neutrinos with matter using the NOvA Experiment, and examines their effects on the determination of the standard oscillation parameters. Data from νμ(ν¯μ)→νμ(ν¯μ) and νμ(ν¯μ)→νe(ν¯e) oscillation channels are used to measure the effect of the NSI parameters ϵeμ and ϵeτ. With 90% CL the magnitudes of the NSI couplings are constrained to be |ϵeμ|≲0.3 and |ϵeτ|≲0.4. A degeneracy at |ϵeτ|≈1.8 is reported, and we observe that the presence of NSI limits sensitivity to the standard CP phase δCP.