A new attempt towards the unification of space-time and internal gauge symmetries

V. Aldaya, E. Sánchez-Sastre

Published 2006-10-03Version 1

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 Poincar\'e group.