ar X iv : h ep - t h / 02 01 19 1 v 1 2 4 Ja n 20 02 Wave function of the radion with a bulk scalar field
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چکیده
The behaviour of the distance between two branes (the 'radion') in a braneworld model with a bulk scalar field is investigated. We show that the BPS conditions of supergravity ensure that the dynamics of the scalar field and the radion are not independent ; we derive the four-dimensional effective action, showing that the effective theory is of scalar–tensor nature, coupling the radion to four-dimensional gravity.
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تاریخ انتشار 2008