论文标题
$α'^2 $从双场理论校正
The $α'^2$ correction from double field theory
论文作者
论文摘要
众所周知，可以在双场理论的框架（DFT）的框架中描述$α'$校正对树级有效作用的校正。在这里，我们通过直接计算确定$α'^2 $的DFT动作和转换。结果比以前的提案要简单得多。我们表明，这种校正将已知的$α'^2 $校正重现为异源弦有效作用。还讨论了我们的行动与（隐性）所有订单提案的关系。
It is known that the order $α'$ correction to the tree-level effective action for the bosonic and heterotic string can be described in the framework of Double Field Theory (DFT). Here we determine the DFT action and transformations at order $α'^2$ by a direct calculation. The result is vastly simpler than previous proposals. We show that this correction reproduces the known $α'^2$ correction to the heterotic string effective action. The relation of our action to an (implicit) all order proposal coming from the so-called generalized Bergshoeff-de Roo identification is also discussed.
