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- W128535501 abstract "Benefits of supersymmetry: from scattering amplitudes to higher-spin gravity by Cheng Peng Chair: Prof. Henriette Elvang In this dissertation, we study two topics related to supersymmetry. One topic is the computation of scattering amplitudes in supersymmetric Yang-Mills (SYM) theory via on-shell methods. We develop a formalism to compute the SYM scattering amplitudes with N < 4 supersymmetries and examine various properties of the results. In particular, with the help of the generalized unitarity method, we identify the origin of the 1-loop UV divergence of the N < 4 SYM amplitudes. The second topic is on higher-spin gravity in 3-dimensional anti-de Sitter spacetime. We find a noval generalization of higher-spin gravity that includes supersymmetry in the framework of the gauge/gravity correspondence. By explicit computation, we match the asymptotic symmetry of the higher-spin supergravity with the chiral symmetry of the ’t Hooft limit of the CP model, which is the proposed dual 2-dimensional conformal field theory (CFT ). In addition, we consider the special case of spin-3 supergravity and find 3 distinct vacua. We find renormalization group (RG) flows connecting two of them to the third vacuum. Thus a new duality between the two ultraviolet (UV)" @default.
- W128535501 created "2016-06-24" @default.
- W128535501 creator A5090945533 @default.
- W128535501 date "2013-01-01" @default.
- W128535501 modified "2023-09-27" @default.
- W128535501 title "Benefits of Supersymmetry: From Scattering Amplitudes to Higher-Spin Gravity." @default.
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