RR-Dilaton Interaction in a Type IIB Superstring

Details RR-Dilaton Interaction in a Type IIB Superstring RR-Dilaton Interaction in a Type IIB Superstring

1995-12-05

arxiv.org/abs/hep-th/9512028v1

Nucl.Phys. B468 (1996) 155-162

Physics

High Energy Physics

High Energy Physics - Theory

12 pages

Scientific paper

10.1016/0550-3213(96)00100-9

We analyze the interaction between the massless RR states with a dilaton in a type IIB superstring. By constructing vertex operators for massless and massive RR states and computing their correlation functions with a dilaton we find the Ramond-Ramond part of the superstring low-energy effective action. The RR terms appearing in the action do not contain the standard dilatonic factor (string coupling constant). The geometrical interpretation of this fact is presented. Namely we argue that the spin operators in the RR vertices effectively decrease the Euler character of the worldsheet by 1 unit. As a result, the additional dilatonic term proportional to string coupling constant appears in the worldsheet string action.

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