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SUMMARY:Spinning Cosmology
DTSTART:20171127T140000
DTEND:20171127T153000
DTSTAMP:20260429T114717Z
UID:13d60bfbb7f5b97fabe9725e518549bc2f6e313eb5550cd4bfdc6171
CATEGORIES:Conferences - Seminars
DESCRIPTION:Andrei Khmelnitsky (ICTP\, Trieste\, Italy)\nWe study the sign
 atures left by new light particles with spin on the primordial cosmologic
 al fluctuations.\nIn de Sitter spacetime there is a lower bound on non-zer
 o mass of the fields with spin known as Higuchi bound. It forces the fluct
 uations of such fields to decay on super-horizon scales and causes their c
 ontribution to the correlation functions to be highly suppressed. We show 
 that the inflationary backgrounds do allow for spinning particles that ar
 e parametrically lighter than the expansion rate. I introduce the descript
 ion of the particles with spin in the context of the Effective Field Theor
 y of Inflation and discuss the main signatures left by such particles on t
 he primordial fluctuations.
LOCATION:BSP 727 https://plan.epfl.ch/?room==BSP%20727
STATUS:CONFIRMED
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