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arXiv 1602.01101hep-th
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对偶不变高导数引力中的三点函数

Three-point Functions in Duality-Invariant Higher-Derivative Gravity

Usman Naseer, Barton Zwiebach

摘要:

双$α'$ -几何是最简单的具有精确全局对偶对称性的高阶导数引力理论。我们使用这个理论的双度量公式来计算$α'$中所有阶的壳上三点函数。一个简单的模式出现时,与类似的玻色子和杂种三点功能。在这些理论中,振幅分解。该理论没有Gauss-Bonnet项,但在$α'$中包含一个二阶Riemann立方相互作用。

英文摘要:

Doubled $α'$-geometry is the simplest higher-derivative gravitational theory with exact global duality symmetry. We use the double metric formulation of this theory to compute on-shell three-point functions to all orders in $α'$. A simple pattern emerges when comparing with the analogous bosonic and heterotic three-point functions. As in these theories, the amplitudes factorize. The theory has no Gauss-Bonnet term, but contains a Riemann-cubed interaction to second order in $α'$.

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