$t\to bW$ in NonCommutative Standard Model

Abstract

We study the top quark decay to b quark and W boson in the NonCommutative Standard Model (NCSM). The lowest contribution to the decay comes from the terms quadratic in the matrix describing the noncommutative (NC) effects while the linear term is seen to identically vanish because of symmetry. The NC effects are found to be significant only for low values of the NC characteristic scale.

Comments: 11 page Latex file containing 2 eps figures (redrawn). More discussion included. To appear in PRD