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BEGIN:VEVENT
DTSTAMP:20260917T204356Z
LAST-MODIFIED:20150330T145620Z
DTSTART:20150408T193000Z
DTEND:20150408T203000Z
UID:event1418@bu.edu
URL:http://physics.bu.edu/internal/events/show/1418
SUMMARY:Soft-pion theorems and the nonlinear regime of large scale structur
	e 
DESCRIPTION:Featuring Bart Horn\, Columbia University\n\nPart of the HET Se
	minar Series.\n\nAbstract:\nConsistency relations\, which relate the squeez
	ed limit of an N+1-point function to an N-point function\, are extremely us
	eful nonperturbative symmetry statements in cosmology and remain valid even
	 when the N-point function is deep in the nonlinear regime.  In this talk I
	 will discuss the derivation of these relations in conformal Newtonian gaug
	e\, with velocity potential playing the role of the soft pion\, their robus
	tness under astrophysical complications\, and the connection to previously 
	derived relations in zeta (unitary) gauge.  The simplest of these consisten
	cy relations has an especially simple expression in Lagrangian coordinates\
	, which suggests that an analytic understanding of large scale in the nonli
	near regime may be particularly promising in this picture.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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