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29 March 2024
 
  » arxiv » hep-th/9703049

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BPS states and supersymmetric index in N=2 type I string vacua
Jose F. Morales ; Marco Serone ;
Date 6 Mar 1997
Journal Nucl.Phys. B501 (1997) 427-444
Subject hep-th
AbstractWe study the moduli dependence of a class of couplings in $K3 imes T^2$ compactifications of type I string theory, for which one-loop amplitudes can be written in terms of an N=2 supersymmetric index. This index is determined for generic models as a function of the BPS spectrum. As an application we compute the one-loop moduli dependence of the $F_g W^{2g}$ couplings, where W is the N=2 gravitational superfield, for type I compactifications based on the Gimon-Johnson K3 orientifolds, showing explicitly their dependence on the aforementioned index.
Source arXiv, hep-th/9703049
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