Neutrino electromagnetic properties: new approach to oscillations in magnetic fields

2019

Eur. Phys. J. C

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We further develop a recently proposed new approach to the description of the relativistic neutrino flavour ν L e ↔ ν L µ , spin ν L e ↔ ν R e and spin-flavour ν L e ↔ ν R µ oscillations in a constant magnetic field that is based on the use of the exact neutrino stationary states in the magnetic field. The neutrino flavour, spin and spin-flavour oscillations probabilities are calculated accounting for the whole set of possible conversions between four neutrino states. In general, the obtained expressions for the neutrino oscillations probabilities exhibit new inherent features in the oscillation patterns. It is shown, in particular, that: 1) in the presence of the transversal magnetic field for a given choice of parameters (the energy and magnetic moments of neutrinos and the strength of the magnetic field) the amplitude of the flavour oscillations ν L e ↔ ν L µ at the vacuum frequency is modulated by the magnetic field frequency, 2) the neutrino spin oscillation probability (without change of the neutrino flavour) exhibits the dependence on the mass square difference ∆m 2 . CONTENTS

Section: Introductionmentioning

confidence: 99%

Neutrino eigenstates and flavour, spin and spin-flavour oscillations in a constant magnetic field

Popov

2019

Eur. Phys. J. C

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“…The effect of the resonant amplification of neutrino spin oscillations in B ⊥ in the presence of matter was proposed in [24,25], the impact of the longitudinal magnetic field B || was discussed in [26]. The neutrino spin oscillations in the presence of constant twisting magnetic field were considered in [27][28][29][30][31][32].…”

Section: A Brief History Of Neutrino Mixing and Oscillationsmentioning

confidence: 99%

“…Recently a new approach to the description of neutrino spin and spin-flavor oscillations in the presence of an arbitrary constant magnetic field have been developed [32][33][34]. Within the new approach exact quantum stationary states are used for classification of neutrino spin states, rather than the neutrino helicity states that have been used for this purpose within the customary approach in many published papers.…”

Section: A Brief History Of Neutrino Mixing and Oscillationsmentioning

confidence: 99%

Neutrino spin and spin-flavor oscillations in transversal matter currents with standard and nonstandard interactions

Pustoshny

2018

Phys. Rev. D

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After a brief history of two known types of neutrino mixing and oscillations, including neutrino spin and spin-flavor oscillations in the transversal magnetic field, we perform a systematic study of a new phenomenon of neutrino spin and spin-flavor oscillations engendered by the transversal matter currents on the bases of the developed quantum treatment of the phenomenon. Possibilities for the resonance amplification of these new types of oscillations by the longitudinal matter currents and longitudinal magnetic fields are analyzed. Neutrino spin-flavor oscillations engendered by the transversal matter currents in the case of nonstandard interactions of neutrinos with background matter are also considered.

“…3) we develop a new (and more precise than the usual one) approach to description of neutrino spin and spin-flavor oscillations in the presence of an arbitrary magnetic field; our approach [15] is based on the use of the stationary states in the magnetic field for classification of neutrino spin states, contrary to the customary approach when the neutrino helicity states are used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic properties of neutrinos: three new phenomena in neutrino spin oscillations

2016

EPJ Web Conf.

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Abstract. In studies of neutrino electromagnetic properties we discuss three very interesting aspects related to neutrino spin oscillations. First we consider neutrino mixing and oscillations in the mass and flavour bases under the influence of a constant magnetic field with nonzero transversal and longitudinal components. Then we discuss the effect of neutrino spin oscillations induced by electroweak interactions of neutrino with moving matter in case there is matter transversal current or polarization. In the final part of the paper we discuss recently developed approach to description of neutrino spin and spin-flavour oscillations in a constant magnetic field that is based on the use of the exact neutrino stationary states in the magnetic field.