Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-03-27
Class.Quant.Grav. 15 (1998) 2083-2152
Physics
High Energy Physics
High Energy Physics - Theory
79 pages, 8 figures. LaTeX; typos corrected, version to appear in Classical and Quantum Gravity
Scientific paper
10.1088/0264-9381/15/8/003
The limiting procedure of special Kahler manifolds to their rigid limit is studied for moduli spaces of Calabi-Yau manifolds in the neighbourhood of certain singularities. In two examples we consider all the periods in and around the rigid limit, identifying the nontrivial ones in the limit as periods of a meromorphic form on the relevant Riemann surfaces. We show how the Kahler potential of the special Kahler manifold reduces to that of a rigid special Kahler manifold. We extensively make use of the structure of these Calabi-Yau manifolds as K3 fibrations, which is useful to obtain the periods even before the K3 degenerates to an ALE manifold in the limit. We study various methods to calculate the periods and their properties. The development of these methods is an important step to obtain exact results from supergravity on Calabi-Yau manifolds.
Billo' Marco
Denef Frederik
Fre' Pietro
Pesando Igor
Proeyen Antoine Van
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