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On-shell methods in quantum chromodynamics, supersymmetric Yang-Mills, and supergravity.

机译:量子色动力学,超对称Yang-Mills和超引力的带壳方法。

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摘要

By applying on-shell recursion relations, the scattering amplitudes for a pair of massive quarks and up to four gluons are presented. We write a formula for the spinors of the on-shell particle propagating between recursion diagrams. Auxiliary recursion relations allow us to prove that perturbative gravity amplitudes are well behaved under large complex deformations of the momenta of a pair of like-helicity gravitons. This establishes that on-shell recursion relations can be constructed for gravity amplitudes using these shifts. By applying the known expressions for SYM and SUGRA tree amplitudes, we write generating functions for the NNMHV box coefficients of SYM as well as the MHV, NMHV, and NN-MHV box coefficients for SUGRA. In support of the relation between dual Wilson loops and SYM scattering amplitudes at weak coupling, the SYM amplitudes are presented in a manifestly dual superconformal form. We introduce ordered box coefficients for efficiently calculating SUGRA quadruple cuts.
机译:通过应用壳上递归关系,给出了一对夸克和最多四个胶子的散射幅度。我们为递归图之间传播的带壳粒子的微调子编写了一个公式。辅助递推关系使我们能够证明扰动重力幅度在一对类似螺旋重力子的矩的大的复杂变形下表现良好。这就确定了可以使用这些位移为重力振幅构造壳上递归关系。通过应用SYM和SUGRA树幅度的已知表达式,我们为SYM的NNMHV箱系数以及SUGRA的MHV,NMHV和NN-MHV箱系数编写了生成函数。为了支持弱耦合下的双Wilson环和SYM散射振幅之间的关系,SYM振幅以明显的双超保形形式表示。我们引入有序盒系数来有效地计算SUGRA四重切口。

著录项

  • 作者

    Hall, Anthony Joseph.;

  • 作者单位

    University of California, Los Angeles.;

  • 授予单位 University of California, Los Angeles.;
  • 学科 Physics Quantum.;Physics Theory.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 110 p.
  • 总页数 110
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:38:30

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