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4 papers
Spectral Constraints on Theories of Colored Particles and Gravity
Aaron Hillman, Yu-tin Huang, Laurentiu Rodina +1
In this letter, we consider effective field theories for light fields transforming under the fundamental or adjoint representation of a continuous group. We demonstrate that in the…
Kinematic Flow and the Emergence of Time
Nima Arkani-Hamed, Daniel Baumann, Aaron Hillman +3
Perhaps the most basic question we can ask about cosmological correlations is how their strength changes as we smoothly vary kinematic parameters. The answer is encoded in differen…
Differential Equations for Cosmological Correlators
Nima Arkani-Hamed, Daniel Baumann, Aaron Hillman +3
Cosmological fluctuations retain a memory of the physics that generated them in their spatial correlations. The strength of correlations varies smoothly as a function of external k…
A Subtraction Scheme for Feynman Integrals
Aaron Hillman
We present a subtraction scheme for ultraviolet (UV) divergent, infrared (IR) safe scalar Feynman integrals in dimensional regularization with any number of scales. This is done by…