The standard electroweak model in the noncommutative DFR space–time

Abstract

The noncommutative (NC) framework elaborated by Doplicher, Fredenhagen and Roberts (DFR) has a Lorentz invariant spacetime structure in order to be considered as a candidate to understand the physics of the early Universe. In DFR formalism the NC parameter (θ µν ) is a coordinate operator in an extended Hilbert space and it has a conjugate momentum. Since x and θ µν are independent coordinates, the Weyl-Moyal (WM) product can be used in this framework. With these elements, in this work, we have constructed the standard electroweak model. To accomplish this task we have begun with the construction of a DFR metric tensor. After that we have analyzed the WM-product basis group of symmetry. After that we have introduced the spontaneous symmetry breaking and the hypercharge in DFR framework. The electroweak symmetry breaking was analyzed and the masses of the new bosons were computed. Finally, the gauge symmetry and gauge transformations were discussed.