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SUMMARY:The future of primordial non-Gaussianities - Sebastien Renaux-Pete
 l (IAP\, Paris)
DTSTART:20230424T120000Z
DTEND:20230424T130000Z
UID:TALK196078@talks.cam.ac.uk
CONTACT:Dr  Dong-Gang Wang
DESCRIPTION:The field of primordial non-Gaussianities is twenty years old.
  During that time\, cosmologists have built a dictionary between the physi
 cs active during inflation and higher-order correlation functions of primo
 rdial density fluctuations. I will argue that this dictionary is far from 
 complete\, with theoretical predictions available only in restricted class
 es of theories.  To fill in this gap\, I will present the cosmological flo
 w\, a complete and systematic approach to compute inflationary correlators
  for all inflationary theories. This enables to assist our theoretical und
 erstanding and to generate theoretical data for an unbiased interpretation
  of upcoming cosmological observations. I will explain that the cosmologic
 al collider signal\, lying in soft limits of correlators\, often described
  as a robust probe of the field content of inflation\, is as robust as its
  assumptions are restrictive\, and I will show its properties in theories 
 involving multiple degrees of freedom\, with strong mixing\, and in the pr
 esence of features. Eventually\, I will describe the low speed collider si
 gnal\, a recently identified signature of heavy fields characterised by pe
 culiar resonances in soft limits\, and which can be understood in terms of
  a non-local single-field effective field theory.\n
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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