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SUMMARY:Positivity bounds on effective field theories - Shuang-Yong Zhou (
 USTC)
DTSTART:20240129T130000Z
DTEND:20240129T140000Z
UID:TALK209791@talks.cam.ac.uk
CONTACT:Dr  Dong-Gang Wang
DESCRIPTION:Unitarity and analyticity are some of the most fundamental pro
 perties of S-matrix/quantum field theory. I will explain why these simple 
 properties can impose strong constraints on the Wilson coefficients/coupli
 ng constants of a Lorentz invariant effective field theory. The central to
 ol to use is the dispersion relations\, and stronger bounds can be extract
 ed if the crossing symmetry and unitarity conditions are fully utilized. I
  will discuss a couple of applications of these bounds in cosmology and pa
 rticle physics.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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