  Kappa-Minkowski space-time is an example of noncommutative space-time with
potentially interesting phenomenology. However, the construction of field
theories on this space is plagued with ambiguities. We propose to resolve
certain ambiguities by clarifying the geometrical picture of gauge
transformations on the kappa-Minkowski space-time in the twist approach. We
construct the action for the noncommutative U(1) gauge fields in a geometric
way, as an integral of a maximal form. The effective action with the first
order corrections in the deformation parameter is obtained using the
Seiberg-Witten map to relate noncommutative and commutative degrees of freedom.

High Energy Physics - Theory