We show how the integration of massive modes after a spontaneous symmetry
breaking in a sigma model can often be interpreted as a contraction, induced by
a group contraction, of the target space of the sigma model.Comment: 9 pages. Prepared for the porceedings of the 4-th International
  Symposium Quantum Theory and Symmetries. Varna, Bulgaria, 15-21 August 200

Lledo, M. A.

Macia, O.

English

arXiv

We show how the integration of massive modes after a spontaneous symmetry breaking in a sigma model can often be interpreted as a contraction, induced by a group contraction, of the target space of the sigma model.We show how the integration of massive modes after a spontaneous symmetry breaking in a sigma model can often be interpreted as a contraction, induced by a group contraction, of the target space of the sigma model

Contractions of sigma models and integration of massive modes

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