Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-03-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages; references added
Scientific paper
We study linearized graviton in the presence of a four-dimensional cosmological constant in two brane models with a warped extra dimension. In explicit models including bulk scalar fields, we calculate the masses of Kaluza-Klein modes of graviton and their interactions with matter on the visible brane. It is shown that the effects of the cosmological constant contribute by the equivalent size to the warp factor, masses and couplings and that bulk scalar fields can increase the effects. This is examined further independently of the forms of scalar potentials. Then it is found how the masses and couplings are described in terms of the warp factors and generic scalar potentials. A possibility that the masses and couplings are significantly changed by cosmological constant effects is discussed.
Muta Naohiro
Uekusa Nobuhiro
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