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29 March 2024
 
  » arxiv » physics/0509131

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Kinematical formalism of elementary spinning particles
Martin Rivas ;
Date 15 Sep 2005
Subject General Physics; Classical Physics | physics.gen-ph physics.class-ph
AbstractThe concept of elementary particle rests on the idea that it is a physical system with no excited states, so that all possible kinematical states of the particle are just kinematical modifications of any one of them. The way of describing the particle attributes is equivalent to describe the collection of consecutive inertial observers who describe the particle in the same kinematical state. The kinematical state space of an elementary particle is a homogeneous space of the kinematical group. By considering the largest homogeneous spaces of both, Galilei and Poincaré groups, it is shown how the spin structure is related to the different degrees of freedom. The formalism is quantized by means of Feynman’s path integral approach and special attention is paid to the classical model which satisfies Dirac’s equation. Dirac’s algebra is related to the classical observables, in particular to the orientation variables. Several spin effects are also analyzed.
Source arXiv, physics/0509131
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