Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1995-05-17
Nucl.Phys.B450:69-89,1995
Physics
High Energy Physics
High Energy Physics - Theory
30 pages, Expansions and Modifications on more potential dual pairs involving K3 fibrations. Version to appear in Nuclear Phys
Scientific paper
10.1016/0550-3213(95)00307-E
We search for $N=2$, $d=4$ theories which can be realized both as heterotic string compactifications on $K_{3}\times T^{2}$ and as type II string compactifications on Calabi-Yau threefolds. In such cases, the exact non-perturbative superpotential of one string theory is given in terms of tree level computations in the other string theory. In particular we find concrete examples which provide the stringy realization of the results of Seiberg and Witten on N=2 Yang-Mills theory, corrected by gravitational/stringy effects. We also discuss some examples which shed light on how the moduli spaces of different N=2 heterotic vacua are connected.
Kachru Shamit
Vafa Cumrun
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