Updating neutrino magnetic moment constraints

Cañas, B.C.; Miranda, O. G.; Parada, A.; Tórtola, M.; Valle, J. W. F.

doi:10.1016/j.physletb.2015.12.011

Cited by 63 publications

(57 citation statements)

References 59 publications

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“…This range would imply a transition magnetic moment constraint of µ xy < ∼ 2.5 × 10 −10 µ B to 2σ. This is still roughly an order of magnitude above the recently found constraints on transition moments using sub-MeV Borexino data [16]. If we consider values of magnetic moments closer to the recent laboratory bounds, we find percent changes in D/H to be 0.021% , Y P to be 0.0021% , and N eff to be 0.068% for the case that all three transition moments are ∼ 7 × 10 −11 µ B .…”

Section: Discussionsupporting

confidence: 57%

“…Such constraints were first found in [14] using available solar + reactor scattering data from experiments such as SNO, SuperK, ROVNO and MUNU. A recent analysis of sub-MeV Borexino scattering data [15] found constraints on the three Majorana transition moments in the mass basis to be µ ij ≤ [3.1 − 5.6] × 10 −11 µ B [16]. These new limits given by Borexino data are stronger than those found from MUNU and TEXONO data, and secondary only to constraints from GEMMA data which for Majorana moments are µ ij ≤ [2.9 − 5.0] × 10 −11 µ B [16].…”

Section: Introductionmentioning

confidence: 99%

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Majorana neutrino magnetic moment and neutrino decoupling in big bang nucleosynthesis

et al. 2015

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We examine the physics of the early universe when Majorana neutrinos (νe, νµ, ντ ) possess transition magnetic moments. These extra couplings beyond the usual weak interaction couplings alter the way neutrinos decouple from the plasma of electrons/positrons and photons. We calculate how transition magnetic moment couplings modify neutrino decoupling temperatures, and then use a full weak, strong, and electromagnetic reaction network to compute corresponding changes in Big Bang Nucleosynthesis abundance yields. We find that light element abundances and other cosmological parameters are sensitive to magnetic couplings on the order of 10 −10 µB. Given the recent analysis of sub-MeV Borexino data which constrains Majorana moments to the order of 10 −11 µB or less, we find that changes in cosmological parameters from magnetic contributions to neutrino decoupling temperatures are below the level of upcoming precision observations.

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Section: Discussionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Majorana neutrino magnetic moment and neutrino decoupling in big bang nucleosynthesis

et al. 2015

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“…Analyses of such limits in conjunction with different sets of data can be found in Refs. [17][18][19].…”

Section: Resultsmentioning

confidence: 99%

New limits on neutrino magnetic moment through nonvanishing 13-mixing

Guzzo¹,

Holanda²,

Peres³

2018

Phys. Rev. D

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The relatively large value of the neutrino mixing angle θ 13 set by recent measurements allows us to use solar neutrinos to set a limit on the neutrino magnetic moment involving the second and third flavor families, μ 23 . The existence of a random magnetic field in the solar convective zone can produce a significant antineutrino flux when a nonvanishing neutrino magnetic moment is assumed. Even if we consider a vanishing neutrino magnetic moment involving the first family, electron antineutrinos are indirectly produced through the mixing between the first and third families and μ 23 ≠ 0. Using KamLAND limits on the solar flux of electron antineutrino, we set the limit μ 23 < 0.95 × 10 −11 μ B as a reasonable assumption on the behavior of solar magnetic fields. This is the first time that a limit on μ 23 has been established in the literature directly from neutrino interactions with magnetic fields, and, interestingly enough, is comparable with the limits on the neutrino magnetic moment involving the first family and with the ones coming from modifications to the electroweak cross section.

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“…21, observed that the neutrino magnetic moment is bounded from above by the value μ ν < 2.9 × 10 −11 μ B and the bound obtained from Borexino, see Ref. 22, data gave μ ν ≤ 3.1 × 10 −11 μ B . Since a wide range of neutrino magnetic moments is possible up to the current laboratory upper limit beyond standard model, it is interesting to investigate the phenomenological consequences of the nonvanishing magnetic moment up to the current bounds, which may constrain the bound tighter than the direct measurements of the neutrino magnetic dipole moment.…”

mentioning

confidence: 84%

Instability of strong magnetic field and neutrino magnetic dipole moment

Lee¹

2017

The Fourteenth Marcel Grossmann Meeting

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Vacuum instability of the strong electromagnetic field has been discussed since long time ago. The instability of the strong electric field due to creation of electron pairs is one of the examples, which is known as Schwinger process. What matters are the coupling of particles to the electromagnetic field and the mass of the particle to be produced. The critical electric field for electrons in the minimal coupling is Ec ∼ m 2 e . Spin 1/2 neutral particles but with magnetic dipole moments can interact with the electromagnetic field through Pauli coupling. The instability of the particular vacuum under the strong magnetic field can be formulated as the emergence of imaginary parts of the effective potential. In this talk, the development of the imaginary part in the effective potential as a function of the magnetic field strength is discussed for the configurations of the uniform magnetic field and the inhomogeneous magnetic field. Neutrinos are the lightest particle(if not photon or gluon) in the "standard model", of which electromagnetic property is poorly known experimentally. Recently the observation of neutrino oscillation shows the necessity of neutrino masses. It implies that the standard model is subjected to be modified such that non-trivial electromagnetic structure of neutrino should be reconsidered although they are assigned to be neutral. And the possibility of anomalous electromagnetic form factor is an open question theoretically and experimentally. In this talk, the implication of non-vanishing magnetic dipole moment of neutrinos is also discussed: the instability of the strong magnetic field and the enhancement of neutrino production in high energy collider experiments.

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Updating neutrino magnetic moment constraints

Cited by 63 publications

References 59 publications

Majorana neutrino magnetic moment and neutrino decoupling in big bang nucleosynthesis

Majorana neutrino magnetic moment and neutrino decoupling in big bang nucleosynthesis

New limits on neutrino magnetic moment through nonvanishing 13-mixing

Instability of strong magnetic field and neutrino magnetic dipole moment

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