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Positivity without Boosts: UV/IR Relations for Cosmology

Scott Melville · CERN

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About

Positivity bounds are a powerful tool which can connect IR phenomenology with the underlying fundamental physics in the UV, but to date their implementation has required Lorentz invariance at all scales. This talk describes recent progress in removing this assumption, deriving a set of bounds which can be applied to systems in which boosts are spontaneously broken, such as cosmology. For example, these new bounds place UV constraints on the shapes of cosmological correlators in the CMB which can arise from the effective field theory of single-field inflation..

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The talk

  1. Positivity without Boosts: UV/IR Relations for Cosmology 2021-05-31 · 52 min · CERN's player

Credits and licence

Institution
CERN
Department
Conferences & Workshops
Speaker
Scott Melville
Year
2021
Language
English
Subjects
Astronomy and space
Source
CERN
Licence
CERN, as CERN states it. CERN's terms
Attribution
© CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
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