Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-05-30
J.Phys. A37 (2004) 8329-8348
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages with no figures. Submitted to Nuclear Physics B
Scientific paper
We calculate the helicity and chirality effects experienced by a spin-1/2 particle subjected to classical electromagnetic and gravitational fields. The helicity evolution is then determined in the non-relativistic, relativistic, and ultra-relativistic regimes. We find that inertia-gravitation can distinguish between helicity and chirality. Helicity is not conserved, in general, even when the particles are massless. In this case, however, the inertial fields can hardly be applied to the fermions.
Mobed Nader
Papini Giorgio
Singh Dinesh
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