Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-04-26
Phys.Rev. D71 (2005) 076008
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 2 figures
Scientific paper
10.1103/PhysRevD.71.076008
We report about recent results on Dirac wave packets in the treatment of neutrino flavor oscillation where the initial localization of a spinor state implies an interference between positive and negative energy components of mass-eigenstate wave packets. A satisfactory description of fermionic particles requires the use of the Dirac equation as evolution equation for the mass-eigenstates. In this context, a new flavor conversion formula can be obtained when the effects of chiral oscillation are taken into account. Our study leads to the conclusion that the fermionic nature of the particles, where chiral oscillations and the interference between positive and negative frequency components of mass-eigenstate wave packets are implicitly assumed, modifies the standard oscillation probability. Nevertheless, for ultra-relativistic particles and sharply peaked momentum distributions, we can analytically demonstrate that these modifications introduce correction factors proportional to (m12/p0) square which are practically un-detectable by any experimental analysis
Bernardini Alex E.
Leo Stefano de
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