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arXiv 1306.2970hep-th
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双“-几何

Doubled α'-Geometry

Olaf Hohm, Warren Siegel, Barton Zwiebach

摘要:

我们发展了双坐标场论,确定了定向玻色闭弦论理论中无质量扇形的α'修正。我们的关键工具是一个弦电流代数的自由左手玻色子,使O(D,D)的T-对偶表现。当T-对偶不变时,双态同态和b-场规范变换会得到修正,规范代数由对偶协变柯朗括号的一个'-变形给出。作用量在双度规场中是立方的,这是对引力场进行编码的广义度规的无约束扩展。我们的方法提供了一个一致的截断的弦论的无质量领域的修正,关闭在有限阶在π '。

英文摘要:

We develop doubled-coordinate field theory to determine the α' corrections to the massless sector of oriented bosonic closed string theory. Our key tool is a string current algebra of free left-handed bosons that makes O(D,D) T-duality manifest. While T-dualities are unchanged, diffeomorphisms and b-field gauge transformations receive corrections, with a gauge algebra given by an α'-deformation of the duality-covariantized Courant bracket. The action is cubic in a double metric field, an unconstrained extension of the generalized metric that encodes the gravitational fields. Our approach provides a consistent truncation of string theory to massless fields with corrections that close at finite order in α'.

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