Neutrino oscillations in a magnetic field: the three-flavor case

Lichkunov, Alexey; Popov, Artem; Studenikin, Alexander

doi:10.22323/1.390.0208

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…We have shown that the probabilities exhibit an interplay of oscillations on the vacuum ω vac = ∆m 2 /4p and magnetic ω B = µ ν B ⊥ frequencies. In [10,11] we extended some of our results to the case of three neutrino flavours. The CP-violating effects in oscillations of Majorana neutrinos in a supernova media has been studied using our approach in [12].…”

Section: Introductionmentioning

confidence: 90%

Three-flavour neutrino oscillations in a magnetic field

Lichkunov¹,

Popov²,

Studenikin³

2022

Preprint

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In this paper we study Dirac neutrino oscillations in a magnetic field in the three-flavour case. A theoretical framework developed in [1] is extended to the case of three neutrino species. The closed expressions for neutrino flavour and spin oscillations probabilities are derived. We show that the probabilities exhibit a complicated interplay of oscillation on magnetic µν B and vacuum ∆m 2 ij /2p frequencies. It is also shown that neutrino oscillations in an interstellar magnetic field can modify neutrino fluxes observed in neutrino telescopes.

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Section: Introductionmentioning

confidence: 90%

Three-flavour neutrino oscillations in a magnetic field

Lichkunov¹,

Popov²,

Studenikin³

2022

Preprint

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Cosmic neutrino flux and spin flavor oscillations in intergalactic medium

2023

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Spin-flavor oscillations of relic neutrinos in primordial magnetic field

Alok,

Chall,

Chundawat

et al. 2024

Phys. Rev. D

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The neutrino magnetic moment operator clasps a tiny but nonzero value within the standard model (SM) of particle physics and rather enhanced values in various new physics models. This generation of the magnetic moment (μν) is through quantum loop corrections which can exhibit spin-flavor oscillations in the presence of an external magnetic field. Also, several studies predict the existence of a primordial magnetic field (PMF) in the early Universe, extending back to the era of Big Bang nucleosynthesis (BBN) and before. The recent North American Nanohertz Observatory for Gravitational Waves measurement can be considered as a strong indication of the presence of these PMFs. In this work, we consider the effect of the PMF on the flux of relic neutrinos. For Dirac neutrinos, we show that half of the active relic neutrinos can become sterile due to spin-flavor oscillations well before becoming nonrelativistic owing to the expansion of the Universe and also before the timeline of the formation of galaxies and hence intergalactic fields, subject to the constraints on the combined value of μν and the cosmic magnetic field at the time of neutrino decoupling. For the upper limit of PMF allowed by the BBN, this can be true even if the experimental bounds on μν approach a few times its SM value. Published by the American Physical Society 2024

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Neutrino oscillations in a magnetic field: the three-flavor case

Cited by 3 publications

References 2 publications

Three-flavour neutrino oscillations in a magnetic field

Three-flavour neutrino oscillations in a magnetic field

Cosmic neutrino flux and spin flavor oscillations in intergalactic medium

Spin-flavor oscillations of relic neutrinos in primordial magnetic field

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