Electromagnetic Properties of Neutrinos

Broggini, C.; Giunti, C.; Studenikin, Alexander

doi:10.1155/2012/459526

Cited by 126 publications

(151 citation statements)

References 206 publications

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“…The development of our knowledge about neutrino masses and mixing [1][2][3] provides a basis for exploring neutrino properties and interactions beyond the standard model (BSM). In this respect, the study of nonvanishing electromagnetic characteristics of massive neutrinos is of particular interest [4][5][6]. It can help not only to shed light on whether neutrinos are Dirac or Majorana particles, but also to constrain the existing BSM theories and/or to hint at new physics.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic properties of massive neutrinos in low-energy elastic neutrino-electron scattering

Kouzakov

Studenikin

2017

Phys. Rev. D

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A thorough account of electromagnetic interactions of massive neutrinos in the theoretical formulation of low-energy elastic neutrino-electron scattering is given. The formalism of neutrino charge, magnetic, electric, and anapole form factors defined as matrices in the mass basis is employed under the assumption of three-neutrino mixing. The flavor change of neutrinos traveling from the source to the detector is taken into account and the role of the source-detector distance is inspected. The effects of neutrino flavor-transition millicharges and charge radii in the scattering experiments are pointed out.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic properties of massive neutrinos in low-energy elastic neutrino-electron scattering

Kouzakov

Studenikin

2017

Phys. Rev. D

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“…Here, we neglect the contribution from light neutrino masses, which is roughly nine orders of magnitude smaller than the current experimental limit µ < 2 × 10 −10 µ B [46]. One should keep in mind that the Majorana transition moments in the SM (with non-zero neutrino mass) are negligibly small µ SM 10 −23 µ B [46]. It is easy to see that (21) gives roughly µ 10 −19 µ B for generic values of M D in (7), still a hopelessly small value.…”

Section: Neutrino Transition Moments By Definingmentioning

confidence: 95%

Connecting Dirac and Majorana Neutrino Mass Matrices in the Minimal Left-Right Symmetric Model

2013

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Probing the origin of neutrino mass by disentangling the seesaw mechanism is one of the central issues of particle physics. We address it in the minimal left-right symmetric model and show how the knowledge of light and heavy neutrino masses and mixings suffices to determine their Dirac Yukawa couplings. This in turn allows one to make predictions for a number of high and low energy phenomena, such as decays of heavy neutrinos, neutrinoless double beta decay, electric dipole moments of charged leptons and neutrino transition moments. We also discuss a way of reconstructing the neutrino Dirac Yukawa couplings at colliders such as the LHC.

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“…In many extensions of the Standard Model neutrinos acquire electromagnetic properties (see Broggini et al 2012 for a review), which makes studying the electromagnetic properties of neutrinos a basic tool for investigating the physics beyond the Standard Model. The idea that neutrinos could have a magnetic dipole moment (μ ν ) is as old as the idea of the neutrinos themselves.…”

Section: Introductionmentioning

confidence: 99%

Limits on the neutrino magnetic dipole moment from the luminosity function of hot white dwarfs

Bertolami

Miguel²

2014

A&A

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Context. Recent determinations of the white dwarf luminosity function (WDLF) from very large surveys have extended our knowledge of the WDLF to very high luminosities. This, together with the availability of new full evolutionary white dwarf models that are reliable at high luminosities, have opened the possibility of testing particle emission in the core of very hot white dwarfs, where neutrino processes are dominant. Aims. We use the available WDLFs from the Sloan Digital Sky Survey and the SuperCOSMOS Sky Survey to constrain the value of the neutrino magnetic dipole moment (μ ν ). Methods. We used a state-of-the-art stellar evolution code to compute a grid of white dwarf cooling sequences under the assumptions of different values of μ ν . Then we constructed theoretical WDLFs for different values of μ ν and performed a χ 2 -test to derive constraints on the value of μ ν . Results. We find that the WDLFs derived from the Sloan Digital Sky Survey and the SuperCOSMOS Sky Survey do not yield consistent results. The discrepancy between the two WDLFs suggests that the uncertainties are significantly underestimated. Consequently, we constructed a unified WDLF by averaging the SDSS and SSS and estimated the uncertainties by taking into account the differences between the WDLF at each magnitude bin. Then we compared all WDLFs with theoretical WDLFs. Comparison between theoretical WDLFs and both the SDSS and the averaged WDLF indicates that μ ν should be μ ν < 5 × 10 −12 e /(2m e c). In particular, a χ 2 -test on the averaged WDLF suggests that observations of the disk WDLF exclude values of μ ν > 5 × 10 −12 e /(2m e c) at more than a 95% confidence level, even when conservative estimates of the uncertainties are adopted. This is close to the best available constraints on μ ν from the physics of globular clusters. Conclusions. Our study shows that modern WDLFs, which extend to the high-luminosity regime, are an excellent tool for constraining the emission of particles in the core of hot white dwarfs. However, discrepancies between different WDLFs suggest there might be some relevant unaccounted systematic errors. A larger set of completely independent WDLFs, as well as more detailed studies of the theoretical WDLFs and their own uncertainties, is desirable to explore the systematic uncertainties behind this constraint. Once this is done, we believe the Galactic disk WDLF will offer constraints on the magnetic dipole moment of the neutrino similar to the best available constraints obtainable from globular clusters.

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Electromagnetic Properties of Neutrinos

Cited by 126 publications

References 206 publications

Electromagnetic properties of massive neutrinos in low-energy elastic neutrino-electron scattering

Electromagnetic properties of massive neutrinos in low-energy elastic neutrino-electron scattering

Connecting Dirac and Majorana Neutrino Mass Matrices in the Minimal Left-Right Symmetric Model

Limits on the neutrino magnetic dipole moment from the luminosity function of hot white dwarfs

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