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Is the string coupling constant invariant under T-duality?

Authors
Journal
Nuclear Physics B - Proceedings Supplements
0920-5632
Publisher
Elsevier
Publication Date
Volume
57
Identifiers
DOI: 10.1016/s0920-5632(97)00352-6

Abstract

Abstract It is well known that under T-duality the sigma model dilaton (which is normally though to be related to the string coupling constant through the simple formula κ = exp < φ >), undergoes an additional shift. On the other hand, Kugo and Zwiebach, using a simplified form of string field theory, claim that the string coupling constant does not change under the T-duality. Obviously, what seems to happen is that two different coupling constants, associated to different dilatons, are used. In this contribution we shall try to clarify this, and related issues.

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