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arXiv 1702.00191hep-th
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对有效行动的双重制约

Duality constraints on effective actions

Mohammad R. Garousi

摘要:

超弦理论在低能极限下用相应的超引力来描述,其非微扰D膜/O面激发用DBI和WZ作用量来描述。对这些有效作用量的高阶导数修正对于理解基本物体的弦行为是很重要的。它们可以从对应的S矩阵元素的接触项中提取。另一方面,超弦理论具有T-和S-对偶性,它们以对偶性沃德恒等式的形式出现在S-矩阵元素中。这些沃德恒等式可以作为生成函数来构造S-矩阵元素。这些二元性也可以直接用来构造有效的行动。本文综述了可用于生成S-矩阵元的对偶沃德恒等式,以及可直接用于构造有效作用量的高阶导数修正的对偶.

英文摘要:

Superstring theories at low energy limit are described by the corresponding supergravities, and their non-perturbative D-brane/O-plane excitations are described by DBI and WZ actions. Higher derivative corrections to these effective actions are important for understanding the stringy behavior of the fundamental objects. They may be extracted from the contact terms of the corresponding S-matrix elements. On the other hand, the superstring theories enjoy the T- and S-dualities which appear in the S-matrix elements as duality Ward identities. These Ward identities might be used as generating functions for constructing the S-matrix elements. The dualities may also be used directly to construct the effective actions. In this article, we review the duality Ward identities which can be used to generate S-matrix elements, and review the dualities which may be used directly to construct the higher derivative corrections to the effective actions.

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