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arXiv 1907.13613hep-th
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$AdS_5\times S^5$超背景下无质量超粒子的多扭量力学

Multitwistor mechanics of massless superparticle on $AdS_5\times S^5$ superbackground

D. V. Uvarov

摘要:

在$D=10$无质量超粒子模型的一阶表述下,研究了与IIB超引力$AdS_5\times S^5$超背景有关的超扭.产品结构的背景表明,使用$D=1+4$洛伦兹谐波变量来表达的动量分量正切$AdS_5$和$D=5$谐波来表达的动量分量正切$S^5$,产生八超扭量制定的超粒子的拉格朗日。我们找到了超扭转与$AdS_5\times S^5$超空间坐标和它们所满足的二次约束的关联关系。它示出了如何使用(洛伦兹)谐波变量的约束,它是可能的,以减少八supertwistor制定的四supertwistor之一。相应的超扭同意以前在其他模型中介绍的。四超扭量公式的优点是只存在有利于超粒子模型分析的第一类约束。

英文摘要:

Supertwistors relevant to $AdS_5\times S^5$ superbackground of IIB supergravity are studied in the framework of the $D=10$ massless superparticle model in the first-order formulation. Product structure of the background suggests using $D=1+4$ Lorentz-harmonic variables to express momentum components tangent to $AdS_5$ and $D=5$ harmonics to express momentum components tangent to $S^5$ that yields eight-supertwistor formulation of the superparticle's Lagrangian. We find incidence relations of the supertwistors with the $AdS_5\times S^5$ superspace coordinates and the set of the quadratic constraints they satisfy. It is shown how using the constraints for the (Lorentz-)harmonic variables it is possible to reduce eight-supertwistor formulation to the four-supertwistor one. Respective supertwistors agree with those introduced previously in other models. Advantage of the four-supertwistor formulation is the presence only of the first-class constraints that facilitates analysis of the superparticle model.

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