A new attempt towards the unification of space-time and internal gauge symmetries
V. Aldaya, E. Sánchez-Sastre
Abstract
The neat formulation that describes the gauge interactions associated with internal symmetries is extended to the case of a simple, yet non-trivial, symmetry group structure which mixes gravity and electromagnetism by associating a gauge symmetry with a central extension of the Poincaré group.
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