5 papers
A Boolean-Lattice Perspective for All-Loop Two-Site Cosmological Wavefunction
Yanfeng Hang, Cong Shen
We revisit the shifted-tree decomposition formula proposed in our previous work arXiv:2410.17192 for two-site cosmological wavefunction coefficients. For the two-site bubble-like f…
Notes on Magnetic Monopoles from Partial Electromagnetic Duality
Yanfeng Hang
In this work, we propose a novel partial electromagnetic duality and construct its consistent realization using an extended gauge group $\mathrm{U}(1)_{\mathrm{q}}^{}\otimes\mathrm…
A Note on Kinematic Flow and Differential Equations for Two-Site One-Loop Graph in FRW Spacetime
Yanfeng Hang, Cong Shen
In this work, we systematically study the differential systems governing loop-level wavefunction coefficients of conformally-coupled scalar field theory within a general power-law…
Equivalence Theorems and Double-Copy Structure in Scattering Amplitudes of Massive Kaluza-Klein States with Matter Interactions
Kezhu Guo, Yanfeng Hang
We investigate the scattering amplitudes of massive Kaluza-Klein (KK) states in compactified five-dimensional warped gauge and gravity theories. Focusing on tree-level proc…
Structure of Massive Gauge/Gravity Scattering Amplitudes, Equivalence Theorems, and Extended Double-Copy with Compactified Warped Space
Yanfeng Hang, Wei-Wei Zhao, Hong-Jian He +1
We study the structure of scattering amplitudes of massive Kaluza-Klein (KK) states in the compactified 5-dimensional warped gauge and gravity theories. We present systematic formu…