Kaluza-Klein modes of gauge vector field on brane with codimension-
arXiv:2002.03606 · doi:10.1016/j.physletb.2020.135781
Abstract
From the paper [JHEP 01 (2019) 021], it is known that the effective action of a massless gauge vector field on a codimension-2 brane is gauge invariant due to the coupling between the vector Kaluza-Klein (KK) modes with two types of scalar KK modes. It is interesting to generalize this result to a brane world model with an arbitrary number of extra dimensions. In this work, we first investigate the case with three extra dimensions. After KK decomposition, there are three types of scalar KK modes. In addition to the mutual coupling between these scalar modes, there are also coupling between the scalar and the vector KK modes. The coupling constants are not all independent. The relationships between the coupling constants enable us to obtain a gauge invariant effective action, from which we can see that the masses of the vector KK modes depend on all the three extra dimensions. The masses of the scalar modes, however, depend only on two of the three extra dimensions. Then we generalize the results into branes with codimension (), and find that will directly affect the masses of the KK modes. But there is always a gauge invariant effective action for the massive vector KK modes.
arXiv commentExtended the discussions to a model with extra dimensions, references added, accepted for publication in Physics Letters B
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