Neutrino scattering on polarized electron target as a test of neutrino magnetic moment

Rashba, T. I.; Semikoz, V. B.

doi:10.1016/s0370-2693(00)00329-4

Cited by 16 publications

(18 citation statements)

References 12 publications

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“…It has been pointed out that investigation of the flavor composition of a (anti)neutrino beam could be possible by studying their scattering from polarized electrons in a polarized target [7]. A polarized electron target was suggested also to improve the sensitivity of the search for the neutrino magnetic moment in the scattering process (anti)neutrino -electron [8]. Compared to traditional detection techniques, in this approach -that makes use of polarizable material -the electromagnetic background limit should not be relevant, since it could be subtracted from the spectra as a measurable noise contribution.…”

Section: Introductionmentioning

confidence: 99%

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An active electron polarized scintillating GSO target for neutrino physics

Baiboussinov

Braggio

Cardini

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Introductionmentioning

confidence: 99%

“…A 10% variation in the total number of registered events is expected when inverting the direction of the magnetic field in which the active material is placed. This last expedient has also been suggested to improve the measurement of the magnetic moment of the neutrino [8].…”

Section: Introductionmentioning

confidence: 99%

An active electron polarized scintillating GSO target for neutrino physics

Baiboussinov

Braggio

Cardini

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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“…It is worth reminding that the PET has been proposed to test the flavor composition of (anti)neutrino beam [20] and various effects of non-standard physics. We mean the neutrino magnetic moments, TRSV in the leptonic processes [21], axions, spin-spin interaction in gravitation [22][23][24][25][26][27][28] The possibility of using polarized targets of nucleons and of electrons for the fermionic, scalar and vector dark matter detection is also worth noticing [29][30][31]. The methods of producing the spin-polarized gasses such as helium, argon and xenon are described in [32,33].…”

Section: Introductionmentioning

confidence: 99%

Neutrino elastic scattering on polarized electrons as a tool for probing the neutrino nature

Błaut

Sobków

2020

Eur. Phys. J. C

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Possibility of using the polarized electron target (PET) for testing the neutrino nature is considered. One assumes that the incoming electron neutrino (ν e ) beam is the superposition of left chiral states with right chiral ones. Consequently the non-vanishing transversal components of ν e spin polarization may appear, both T-even and T-odd. ν e s are produced by the low energy monochromatic (un)polarized emitter located at a near distance from the hypothetical detector which is able to measure both the azimuthal angle and polar angle of the recoil electrons, and/or also the energy of the outgoing electrons with a high resolution. A detection process is the elastic scattering of ν e s (Dirac or Majorana) on the polarized electrons. Left chiral (LC) ν e s interact mainly by the standard V − A interaction, while right chiral (RC) ones participate only in the non-standard V + A, scalar S R , pseudoscalar P R and tensor T R interactions. We show that a distinction between the Dirac and Majorana ν e s is possible both for the purely left chiral states and the left-right superposition. In the first case a departure from the standard prediction of the azimuthal asymmetry of recoil electrons is caused by the interferences between the non-standard complex S and T couplings, proportional to the angular correlations (T-even and T-odd) among the polarization of the electron target, the incoming neutrino momentum and the outgoing electron momentum. Such a deviation would indicate the Dirac nature of ν e s. In the second variant the azimuthal asymmetry, polar distribution and energy spectrum of scattered electrons are sensitive to the interference terms between the standard and exotic interactions, proportional to the various angular correlations (T-even and T-odd) among the transversal ν e spin polarization (related to the ν e source), the electron target polarization, the incoming ν e momentum and the outgoing electron momentum. The basic difference a between the Dirac and Majorana ν e s arises from the absence of T and V interactions in the Majorana scenario. Moreover, in the Majorana case the above observables contain the non-vanishing interference between V − A and V + A interactions, proportional to the T-even longitudinal ν e polarization. Our model-independent study is carried out for the flavor ν e eigenstates in the relativistic ν e limit.

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“…In order to do that, we will consider that neutrinos are unpolarized and that the electron in the target is polarized. The possible use of polarized electrons in ν-e elastic scattering has been previously proposed in order to look for other non-standard neutrino interactions, as the neutrino magnetic moment itself [18], or possible C P violation signals [19] among other different motivations [20]. An efficient Polarized Electron Target (PET) can be obtained applying strong, although realistic, magnetic fields to the detector [18,19].…”

mentioning

confidence: 99%

“…The possible use of polarized electrons in ν-e elastic scattering has been previously proposed in order to look for other non-standard neutrino interactions, as the neutrino magnetic moment itself [18], or possible C P violation signals [19] among other different motivations [20]. An efficient Polarized Electron Target (PET) can be obtained applying strong, although realistic, magnetic fields to the detector [18,19]. Putting aside for the moment the technical difficulties in order to have such PET detector, here we will show that the electron polarization could enhance the difference between Dirac and Majorana neutrinos as long as neutrinos had lost their initial polarization due to an interaction of the neutrino with external magnetic fields in some wild astrophysical environment.…”

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confidence: 99%

Scattering processes could distinguish Majorana from Dirac neutrinos

et al. 2014

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It is well known that Majorana neutrinos have a pure axial neutral current interaction while Dirac neutrinos have the standard vector-axial interaction. In spite of this crucial difference, usually Dirac neutrino processes differ from Majorana processes by a term proportional to the neutrino mass, resulting in almost unmeasurable observations of this difference. In the present work we show that once the neutrino polarization evolution is considered, there are clear differences between Dirac and Majorana scattering on electrons. The change of polarization can be achieved in astrophysical environments with strong magnetic fields. Furthermore, we show that in the case of unpolarized neutrino scattering onto polarized electrons, this difference can be relevant even for large values of the neutrino energy.Comment: 12 pages, 5 figure

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Neutrino scattering on polarized electron target as a test of neutrino magnetic moment

Cited by 16 publications

References 12 publications

An active electron polarized scintillating GSO target for neutrino physics

An active electron polarized scintillating GSO target for neutrino physics

Neutrino elastic scattering on polarized electrons as a tool for probing the neutrino nature

Scattering processes could distinguish Majorana from Dirac neutrinos

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