8 citations · 15 across the 5 of their papers we have counts for
6 papers
Kinematic Flow for Banana Loops and Unparticles
Tom Westerdijk, Chen Yang
We extend kinematic flow to a class of momentum-integrated loop-level cosmological correlators: banana loops of conformally coupled scalars in power-law cosmologies and, in de Sitt…
On Cosmological Correlators at One Loop
Guilherme L. Pimentel, Tom Westerdijk
We study equal-time in-in correlators of massless scalar fields in flat space at one loop. Using the time-ordered decomposition of correlators together with a cosmological analogue…
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…
Bananas are Unparticles: Differential Equations and Cosmological Bootstrap
Tom Westerdijk, Chen Yang
We establish an exact correspondence between tree-level cosmological correlators with unparticle exchange (at integer scaling dimensions) and banana diagrams of conformally coupled…
Algebraic Approaches to Cosmological Integrals
Claudia Fevola, Guilherme L. Pimentel, Anna-Laura Sattelberger +1
Cosmological correlators encode statistical properties of the initial conditions of our universe. Mathematically, they can often be written as Mellin integrals of a certain rationa…
Non-linear Electrodynamics from Massive Gravity
Thomas Flöss, Diederik Roest, Tom Westerdijk
As a counterpart to the four-fermion interaction, which describes massive vector exchange at low energies, we investigate the low energy effective action of photons under exchange…