Double field theory at order α′
Double field theory at order α′
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DOI：
10.1007/jhep11(2014)075
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发表时间：
2014-07
影响因子：
5.4
通讯作者：
O. Hohm;B. Zwiebach
中科院分区：
文献类型：
--
作者：
O. Hohm;B. Zwiebach
我们在双场理论的框架下研究玻色弦的α修正。前面介绍的“双α‘几何”给出了在格林-施瓦茨反常抵消机制中产生的α形变规范变换，但不适用于玻色弦。这需要控制规范结构的对偶协变Courant括号的不同变形。这是通过检查封闭弦场论规范代数中的α修正来揭示的。我们构造了形变规范变换下的四阶三次双场理论作用不变量，首次揭示了玻色弦α修正背后的规范原理。通过非协变的场重新定义，将通常的度规和b场与对偶协变的场联系起来。
We investigate α′ corrections of bosonic strings in the framework of double field theory. The previously introduced “doubled α′-geometry” gives α′-deformed gauge transformations arising in the Green-Schwarz anomaly cancellation mechanism but does not apply to bosonic strings. These require a different deformation of the duality-covariantized Courant bracket which governs the gauge structure. This is revealed by examining the α′ corrections in the gauge algebra of closed string field theory. We construct a four-derivative cubic double field theory action invariant under the deformed gauge transformations, giving a first glimpse of the gauge principle underlying bosonic string α′ corrections. The usual metric and b-field are related to the duality covariant fields by non-covariant field redefinitions.