Sound-Horizon-Independent Test of Cosmic Distance Duality Relation Using Artificial Neural Networks and Gaussian Processes

Bo-Hao Jiang, Guo-Jian Wang, Tao Yang

The cosmic distance duality relation (CDDR), $D_L(z)(1+z{)}^{-2}/D_A(z)\equiv 1$, is a fundamental relation in modern cosmology linking luminosity distance $D_L$ and angular diamete…