3 papers
hep-th2025
Notes on off-shell conformal integrals and correlation functions at five points
Chia-Kai Kuo, Qinglin Yang
We study five-point off-shell conformal integrals and the associated half-BPS correlation functions at two loops in the 't Hooft coupling expansion of maximally supersymmetric Yang…
hep-th2025
Mastering Cosmological Amplitudes Using Generalized Ramanujan's Theorem
Prashanth Raman, Qinglin Yang
We present a systematic method for computing cosmological amplitudes, including in-in correlators and wavefunction coefficients, in FRW spacetime. Specializing to cases with confor…
math-ph2024
Dual conformal invariant kinematics and folding of Grassmannian cluster algebras
Jian-Rong Li, Changjian Su, Qinglin Yang
Grassmannian manifolds $\Gr(4,n)$ are closely related to the kinematic space of -particle scattering processes in , and their combinatorial and geometric structures have pl…