Özet: In this talk, I will present the Weyl-invariant extension of generic n-dimensional higher curvature gravity theories and the corresponding symmetry-breaking mechanisms for (Anti-) de Sitter and Flat vacua. Here, we will see that the mere existence of (Anti-) de Sitter vacua spontaneously breaks the Weyl’s conformal symmetry in an analogous manner to the Standard model Higgs mechanism. As for flat vacua, the dimensionful parameter comes from the dimensional transmutation in Quantum Field Theories, and thus the gauge symmetry is radiatively broken at loop-level via the Coleman-Weinberg mechanism. From the tree-level unitarity of theories, we will show that the Weyl-gauged Einstein-Gauss-Bonnet theory is the only unitary Weyl-invariant quadratic curvature theory in n-dimension.
Yer : MSGSÜ Bomonti Binası, Fizik Bölümü
Tarih : 29 Aralık 2016 Perşembe, 15:00