Can one ever prove that neutrinos are Dirac particles?
نویسندگان
چکیده
منابع مشابه
Do observations prove that cosmological neutrinos are thermally distributed ?
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Neutrino masses and mixings are analyzed in terms of left-handed fields and a 6 × 6 complex symmetric mass matrix M whose singular values are the neutrino masses. An angle xν characterizes the kind of the neutrinos, with xν = 0 for Dirac neutrinos and xν = π/2 for Majorana neutrinos. If xν = 0, then baryonminus-lepton number is conserved. When xν ≈ 0, the six neutrino masses coalesce into three...
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Existing data on neutrino-electron scattering do not imply that neutrinos are not Majorana particles. The question of whether neutrinos are of Majorana or of Dirac character remains completely open. Recently, it has been argued that existing data imply that neutrinos are not Majorana particles. The argument is as follows: 1. If some neutrino is a Majorana particle, then its vector neutral curre...
متن کاملCan gravity distinguish between Dirac and Majorana neutrinos?
We show that spin-gravity interaction can distinguish between Dirac and Majorana neutrino wave packets propagating in a Lense-Thirring background. Using time-independent perturbation theory and the gravitational phase to generate a perturbation Hamiltonian with spin-gravity coupling, we show that the associated matrix element for the Majorana neutrino differs significantly from its Dirac counte...
متن کاملComment on "Can gravity distinguish between Dirac and Majorana neutrinos?".
In a recent letter[1], Singh, Mobed and Papini (hereafter referred to as (I)) claim to show that the gravitaional field associated with the Lense-Thirring metric can distinguish between Dirac and Majorana neutrinos. According to these authors, the matrix element of the interaction Hamiltonian is significantly different, depending on the Dirac or Majorana nature of the neutrino. Here we point ou...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2018
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2018.03.073