Limit on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>τ</mml:mi></mml:math>-neutrino magnetic moment from neutrino counting

Deshpande, N. G.; Sarma, K.V.L.

doi:10.1103/physrevd.43.943

Cited by 11 publications

(11 citation statements)

References 8 publications

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“…we generate the leading d = 6 operators and so the first term in the expressions of ε τ R and κ τ R (9) in L ν ef f and L…”

Section: Explicit Examples For Neutrino Non-standard Interactionsmentioning

confidence: 99%

“…In particular, we will work at tree level and use the 'radiator' approximation to describe photon emission. Thus we can write [21]: 9 Better accuracy is expected in one year or so from MUNU experiment [19]. 10 By combining those two data, we implicitly exclude the possibility that the discrepancy of the measurements in the two distinct energy ranges be ascribed to strong spectral deformations.…”

Section: The Relevance Of σ(E + E − → ννγ)mentioning

confidence: 99%

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Limits on the non-standard interactions of neutrinos from e+e− colliders

2002

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We provide an effective Lagrangian analysis of contact non-standard interactions of neutrinos with electrons, which can be effectively mediated by extra particles, and examine the associated experimental limits. At present, such interactions are strongly constrained only for ν µ : the bounds are loose for ν e and absent for ν τ . We emphasize the unique role played by the reaction e + e − → ννγ in providing direct constraints on such non-standard interactions.

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“…we generate the leading d = 6 operators and so the first term in the expressions of ε τ R and κ τ R (9) in L ν ef f and L…”

Section: Explicit Examples For Neutrino Non-standard Interactionsmentioning

confidence: 99%

Section: The Relevance Of σ(E + E − → ννγ)mentioning

confidence: 99%

Limits on the non-standard interactions of neutrinos from e+e− colliders

2002

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“…The process e + e − → ννγ has been used to examine the constraints on the photon induced electromagnetic interaction for the neutrino (κ). Earlier, bounds for κ were obtained at the Z pole [30] and also below the Z pole [31]. Currently, both the ν e (from SN1987A data) and ν µ (from ν µ e − scattering experiments) set strong bounds on κ, limiting it to less than 10 −10 µ B .…”

Section: Contribution To Neutrino Bremsstrahlung Emissivity Due mentioning

confidence: 99%

Neutrino emission in neutron matter from magnetic moment interactions

2004

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Neutrino emission drives neutron star cooling for the first several hundreds of years after its birth. Given the low energy (∼ keV) nature of this process, one expects very few nonstandard particle physics contributions which could affect this rate. Requiring that any new physics contributions involve light degrees of freedom, one of the likely candidates which can affect the cooling process would be a nonzero magnetic moment for the neutrino. To illustrate, we compute the emission rate for neutrino pair bremsstrahlung in neutron-neutron scattering through photon-neutrino magnetic moment coupling. We also present analogous differential rates for neutrino scattering off nucleons and electrons that determine neutrino opacities in supernovae. Employing current upper bounds from collider experiments on the tau magnetic moment, we find that the neutrino emission rate can exceed the rate through neutral current electroweak interaction by a factor two, signalling the importance of new particle physics input to a standard calculation of relevance to neutron star cooling. However, astrophysical bounds on the neutrino magnetic moment imply smaller effects.

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“…However, if neutrinos have nonvanishing magnetic moments 1 they can also be produced through the photon channel as well [13][14][15]. When we adopt the Pauli interaction [16] as an effective interaction as for beyond standard model physics, the cross section of pair production becomes dominated by the Pauli interaction over the standard process through Z 0 channel as the energy is increasing.…”

mentioning

confidence: 99%

Back-to-back pair correlation of Majorana neutrinos with transit magnetic moments

Lee

2011

Phys. Rev. D

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The pair production of Majorana neutrinos with transit magnetic moments from the annihilation of charged particles in colliding experiments is discussed using the Pauli interaction, through which the neutral neutrinos with magnetic moments can be probed by the photon. The pair of neutrinos with different flavors are produced due to the transit magnetic moment coupling. We discuss the correlations of flavors in pairs produced back-to-back in the center of the mass frame, where the angular distribution peaks at ¼ =2 with respect to the beam direction. We demonstrate that the flavor mixing angle can be inferred by measuring the flavor correlation in pairs.

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Limit onτ-neutrino magnetic moment from neutrino counting

Abstract: Neutrino counting at e + e -colliders can be used to provide a limit on the magnetic moment of the .r neutrino. We obtain a limit of p < 5.6 X 1 0~~~~ at 90% C.L.

Cited by 11 publications

References 8 publications

Limits on the non-standard interactions of neutrinos from e+e− colliders

Limits on the non-standard interactions of neutrinos from e+e− colliders

Neutrino emission in neutron matter from magnetic moment interactions

Back-to-back pair correlation of Majorana neutrinos with transit magnetic moments

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