The exceptional sigma model
The exceptional sigma model
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DOI：
10.1007/jhep04(2018)064
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发表时间：
2018-02
影响因子：
5.4
通讯作者：
Alex S. Arvanitakis;Chris D. A. Blair
中科院分区：
文献类型：
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作者：
Alex S. Arvanitakis;Chris D. A. Blair
我们详细地构造了特殊σ模型，该模型描述了在特殊场论的“扩展时空”中传播的弦。它之于u -二向性就像倍模型之于t -二向性一样。对称定义了唯一的维不变拉格朗日量我们展示了它如何简化为正确的10维弦拉格朗日量。我们还考虑了包含Fradkin-Tseytlin（或广义膨胀）耦合以及带动态张力的重新表述。
We detail the construction of the exceptional sigma model, which describes a string propagating in the “extended spacetime” of exceptional field theory. This is to U-duality as the doubled sigma model is to T-duality. Symmetry specifies the Weylinvariant Lagrangian uniquely and we show how it reduces to the correct 10-dimensional string Lagrangians. We also consider the inclusion of a Fradkin-Tseytlin (or generalised dilaton) coupling as well as a reformulation with dynamical tension.