Abstract:
Motivated by the recent discovery of hidden zeros in particle and string amplitudes, we characterize zeros of individual graphs contributing to the cosmological wavefunction. We construct polytopal realizations of the relevant graph associahedra and show that the cosmological zeros have natural geometric and physical interpretations, as well as demonstrate that the wavefunction splits near these zeros. We also establish an equivalence between a family of flat-space wavefunction coefficients and Tr[\phi^3] amplitudes, consequently rediscovering their hidden zeros.
About the speaker:
Andrzej Pokraka is currently a postdoctoral researcher in the High Energy Theory group at Brown University. He graduated from McGill University with a PhD under the supervision of Simon Caron-Huot in 2022. Andrzej is an expert in the application of intersection theory to Feynman integrals, as well as numerous other areas of recent interest including cosmological wavefunctions and surfaceology.
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