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- W2068418303 abstract "We consider the Born approximation scattering, by electrons, of neutrinos (and antineutrinos) of the muon and of the electron types; the general Lagrangian respecting lepton locality is used. Throughout, we study only differential cross sections as the experimental observables. Some tests previously proposed for “neutrino identity” or Lorentz structure of the neutral weak interaction are reexamined. We find that, in general, these relations cannot uniquely answer the question of Lorentz structure. Similarly, in general, one cannot estblish whether the final neutral lepton is completely identical with, or “partly identical” with, or completely different from, the initial neutrino; identity allows a difference in helicity. In several experimental situations, one can exclude the possibility of a complete non-identity. In one experimental situation, assuming μe universality, one can establish that the final and the initial neutrinos are completely identical, even in their helicity. “Does an interference between neutral currents and the ( V − A ) charged current exist in e - scattering?” Certain tests can answer this question completely if μe universality is assumed. Without μe universality, the answer is “destructive interference” if an observable ( A e ) turns out to be less than 4; A e = 4 would exclude a constructive interference. Assuming neutrino identity, time-reversal invariance for the helicity flipping types ( S , P , T ), and μe universality, certain simple combinations of observables were previously noted to determine the ( V , A ) neutral interaction couplings of the neutrino to the electron. With our general formalism, that determination is seen not to require the first two assumptions. Also, the couplings concerned are seen to be only the “diagonal” ones—which refer to that part of the final state in which the final neutrino is identical with the iniitial one. Keeping in view a recent experimental situation, the following question is answered: “When will the lack of enough events for ν e − scattering (or, similarly, νe − scattering) become a threat to lepton locality?” Some additional consequences of μe universality are noted." @default.
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- W2068418303 date "1983-04-01" @default.
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- W2068418303 title "On some tests of the basic properties of the neutral weak interaction. I. With massless neutrinos" @default.
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- W2068418303 doi "https://doi.org/10.1016/0003-4916(83)90038-6" @default.
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