Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-11-18
J. Phys. G32 (2006) 9-22
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, no figures
Scientific paper
10.1088/0954-3899/32/1/002
Chiral oscillation as well as spin flipping effects correspond to quantum phenomena of fundamental importance in the context of particle physics and, in particular, of neutrino physics. From the point of view of first quantized theories, we are specifically interested in appointing the differences between chirality and helicity by obtaining their dynamic equations for a {\em fermionic} Dirac-{\em type} particle (neutrino). We also identify both effects when the non-minimal coupling with an external (electro)magnetic field in the neutrino interacting Lagrangian is taken into account. We demonstrate that, however, there is no constraint between chiral oscillations, when it takes place in vacuum, and the process of spin flipping related to the helicity quantum number, which does not take place in vacuum. To conclude, we show that the origin of chiral oscillations (in vacuum) can be interpreted as position very rapid oscillation projections onto the longitudinal direction of momentum.
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