Group contractions and its consequences upon representations of different spatial symmetry groups

Details Group contractions and its consequences upon representations of different spatial symmetry groups Group contractions and its consequences upon representations of different spatial symmetry groups

2002-06-05

arxiv.org/abs/hep-th/0206037v2

Physics

High Energy Physics

High Energy Physics - Theory

To be published in the Proceedings of the Summer School "Geometric and Topological methods for Quantum Field Theory", Villa de

Scientific paper

We investigate the group contraction method for various space-time groups, including SO(3)->E_2, SO(3,1)->G_3, SO(5-h,h)->P(3,1) (h=1 or 2), and its consequences for representations of these groups. Following strictly quantum mechanical procedures we specifically pay attention in the asymptotic limiting procedure employed in the contraction G -> G', not only to the respective algebras but to their representations spaces spanned by the eigenvectors of the Cartan subalgebra and the eigenvalues labelling these representation spaces. Where appropriate a physical interpretation is given to the contraction prodecure.

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