Abstract
The chiral superfield model associated with the low-energy limit of superstring theory and characterized by the Kahler and the chiral potential [K(Φ, \(\overline \Phi\)) and W(Φ), respectively] is analyzed. An approach to solving a general problem is developed, and quantum loop corrections at arbitrary K(Φ, \(\overline \Phi\)) and W(Φ) are found. Various aspects of a supergraph technique that are associated with calculating perturbative contributions to the superfield effective action are analyzed. Explicit expressions for the one-and two-loop corrections to the Kahler potential are calculated. The leading two-loop correction to the chiral potential is obtained, and it is shown that, irrespective of the form of K(Φ, \(\overline \Phi\)) and W(Φ), counterterms are not needed for deducing this correction.
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