Thursday, April 12, 2012

1204.2494 (A. A. Deriglazov)

Variational problem for the Frenkel and the Bargmann-Michel-Telegdi
(BMT) equations

A. A. Deriglazov
We propose Lagrangian formulation for the particle with value of spin fixed within the classical theory. The Lagrangian turns out to be invariant under non-abelian group of local symmetries. As the gauge-invariant variables for description of spin we can take either the Frenkel tensor or the BMT vector. Fixation of spin within the classical theory implies $O(\hbar)$\,-corrections to the corresponding equations of motion.
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