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A General Four-Fermion Effective Lagrangian for Dirac and Majorana Neutrino-Charged Matter Interactions
Jean El Bachir Mendy, Jan Govaerts
Given the most general Lorentz invariant four-fermion effective interaction possible for two neutrinos and two charged fermions, whether quarks or leptons, all possible 2-to-2 proc…
Neutrino-Charged Matter Interactions: a General Four-Fermion Effective Parametrization
Jean El Bachir Mendy, Jan Govaerts
Given the eventuality of neutrino and muon factories in the foreseeable future, all possible 2-to-2 processes involving two neutrinos, whether Dirac or Majorana ones, and two charg…
Low Energy Tests of the Standard Model from Beta-Decay and Muon Capture
Jan Govaerts
Two recent low energy precision experiments are considered, in order to illustrate how limits set by these measurements for couplings beyond the Standard Model are complementary to…
Positronium Spectroscopy in a Magnetic Field
Jan Govaerts
Hyperfine spectroscopy of positronium formed in the presence of a static magnetic field is considered. Generalising the situation hitherto developed in the literature, the magnetic…