Geometric imprint of CP violation in two flavor neutrino oscillations

Details Geometric imprint of CP violation in two flavor neutrino oscillations Geometric imprint of CP violation in two flavor neutrino oscillations

2009-07-03

arxiv.org/abs/0907.0562v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

v2 : modified version with new references

Scientific paper

In vacuum or constant density matter, the two flavor neutrino oscillation formulae are insensitive to the presence of CP violating phases owing to the fact that the CP phase can be gauged away. In sharp contrast to the above case, we show that the CP violating phases can not be gauged away in presence of adiabatically changing background density accompanied by varying CP phases. We present a pure geometric visualization of this fact by exploiting Pancharatnam's prescription of cyclic quantum projections. Consequently the topological phase obtained in Phys. Rev. D 79, 096013 (2009) can become geometric if CP violation occurs in a varying density medium.

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