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SUMMARY:Bounding cosmological EFTs - Mariana Carrillo (Imperial College)
DTSTART:20260202T130000Z
DTEND:20260202T140000Z
UID:TALK242617@talks.cam.ac.uk
CONTACT:Gonzalo Villa
DESCRIPTION:It is known Wilson coefficients of an Effective Field Theory c
 annot take any value and still lead to physical descriptions without viola
 tions of causality and unitarity. In this talk\, I will show the consequen
 ces of causality an unitarity on cosmological backgrounds focusing on two-
 point functions. On the first part\, I will consider the consequences of c
 ausality on the EFT of inflation\, particularly in a model that was propos
 ed to give a large abundance of primordial black holes. Afterwards\, I'll 
 show how a positive spectral density in the Kahlen Lehman decomposition ca
 n impose bounds on the Wilson coefficients of the 2-point contributions of
  a spin 0 and spin 1 EFT in de Sitter.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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