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Modular invariance and nonrenormalizable interactions

Authors
Journal
Physics Letters B
0370-2693
Publisher
Elsevier
Publication Date
Volume
287
Identifiers
DOI: 10.1016/0370-2693(92)91880-i
Disciplines
  • Philosophy

Abstract

Abstract We examine the modular properties on nonrenormalizable superpotential terms in the free fermionic formulation of string theory and show that the requirement of modular invariance necessitates the nonvanishing of certain Nth order nonrenormalizable terms. In a class of models we explicitly verify that the nontrivial structure imposed by the modular invariance is indeed present, and further explore the universal and model-dependent contributions to higher-order nonrenormalizable terms in the superpotential. We also discuss the phenomenological implications of the above observations.

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