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UID:550@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20150424T130000
DTEND;TZID=Europe/Berlin:20150424T140000
DTSTAMP:20150505T111749Z
URL:https://qft.physik.hu-berlin.de/next-seminars/subodh-patil-university-
 of-geneva/
SUMMARY:Subodh Patil\, University of Geneva - Not so hidden fields in cosmo
 logy
DESCRIPTION:\n\n\ntalk_Patil_higgs\n\nFields that are completely decoupled 
 from the inflaton still interact with gravitational strength interactions.
  Although these are very suppressed at low energies\, a large number of th
 em can have interesting effects on cosmological observables. We make a few
  observations in this regard\, including i) how the scale dependence of th
 e effective strength of gravity complicates the determination of the absol
 ute energy scale of inflation\, and ii) how the absence of observed non-Ga
 ussianities (i.e. non-vanishing higher order correlation functions) in the
  cosmic microwave background can be used to place bounds on the number of 
 hidden fields in the universe. We discuss the implications of the latter o
 bservation on various string/susy phenomenological scenarios of the early 
 universe.\n\n\n
CATEGORIES:Research Seminars
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DTSTART:20150329T030000
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