4 papers
Cosmological Weight-Shifting Matrices
Claire de Korte, Harry Goodhew, Kamran Salehi Vaziri +1
We construct matrices that shift the scaling dimension of scalar fields for arbitrary de Sitter Feynman diagrams. Acting on a set of master integrals, these weight-shifting matrice…
The Cosmological CPT Theorem
Harry Goodhew, Ayngaran Thavanesan, Aron C. Wall
The CPT theorem states that a unitary and Lorentz-invariant theory must also be invariant under a discrete symmetry which reverses charge, time, and one spatial dire…
Geometry of Kinematic Flow
Daniel Baumann, Harry Goodhew, Austin Joyce +3
We uncover a geometric organization of the differential equations for the wavefunction coefficients of conformally coupled scalars in power-law cosmologies. To do this, we introduc…
Kinematic Flow for Cosmological Loop Integrands
Daniel Baumann, Harry Goodhew, Hayden Lee
Recently, an interesting pattern was found in the differential equations satisfied by the Feynman integrals describing tree-level correlators of conformally coupled scalars in a po…