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arXiv 1708.09249hep-th
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双曲弦平面波的振幅

Amplitudes on plane waves from ambitwistor strings

Tim Adamo, Eduardo Casali, Lionel Mason, Stefan Nekovar

摘要:

与传统的弦论形成鲜明对比的是,当耦合到弯曲的背景场时,ambitwistor弦仍然是可解的世界片理论。利用这一事实,我们考虑了平面波度规和平面波规范场背景下的Ambitwistor弦的量子化。在每种情况下,世界面模型是异常自由的背景满足场方程的结果。我们从世界表CFT中导出了引力子和胶子在这些背景下的顶点算符(固定和下降图数),并研究了这些顶点算符在黎曼球面上的三点函数.这些世界面关联函数分别再现了引力理论平面波背景和规范理论平面波背景中引力子和胶子三点散射振幅的已知结果。

英文摘要:

In marked contrast to conventional string theory, ambitwistor strings remain solvable worldsheet theories when coupled to curved background fields. We use this fact to consider the quantization of ambitwistor strings on plane wave metric and plane wave gauge field backgrounds. In each case, the worldsheet model is anomaly free as a consequence of the background satisfying the field equations. We derive vertex operators (in both fixed and descended picture numbers) for gravitons and gluons on these backgrounds from the worldsheet CFT, and study the 3-point functions of these vertex operators on the Riemann sphere. These worldsheet correlation functions reproduce the known results for 3-point scattering amplitudes of gravitons and gluons in gravitational and gauge theoretic plane wave backgrounds, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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