Abstract
We propose Lagrangian formulation for the particle with value of spin fixed within the classical theory. The Lagrangian is invariant under non-Abelian group of local symmetries. On this reason, all the initial spin variables turn out to be unobservable quantities. As the gauge-invariant variables for description of spin we can take either the Frenkel tensor or the Bargmann-Michel-Telegdi (BMT) vector. Fixation of spin within the classical theory implies O(h)-corrections to the corresponding equations of motion.
| Original language | English |
|---|---|
| Article number | 1250234 |
| Journal | Modern Physics Letters A |
| Volume | 28 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 10 Jan 2013 |
Keywords
- Bargmann-Michel-Telegdi equation
- Frenkel equation
- Semiclassical description of relativistic spin
- Theories with constraints
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Astronomy and Astrophysics
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Deriglazov, A. A. (2013). Variational problem for the frenkel and the Bargmann-Michel-Telegdi (BMT) equations. Modern Physics Letters A, 28(1), [1250234]. https://doi.org/10.1142/S0217732312502343