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SUMMARY:Dalimil Mazáč (Institute of Advanced Study\, Princeton)
DTSTART:20210326T030000Z
DTEND:20210326T040000Z
DTSTAMP:20260423T021256Z
UID:EASW/17
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/EASW/17/">Sh
 arp Boundaries for the Swampland</a>\nby Dalimil Mazáč (Institute of Adv
 anced Study\, Princeton) as part of East Asian String Webinars\n\n\nAbstra
 ct\nI will discuss the problem of bounding higher derivative couplings in 
 consistent weakly coupled gravitational theories. The starting point will 
 be general assumptions about analyticity and Regge growth of the S-matrix.
  Higher derivative couplings are expected to be of order one in the units 
 of the UV cutoff. Our approach justifies this expectation and allows us to
  prove precise bounds on the order one coefficients. I will explain that t
 he notorious difficulties presented by the graviton pole can be overcome b
 y measuring couplings at small impact parameter\, rather than in the forwa
 rd limit. I will illustrate the method in theories containing a massless s
 calar coupled to gravity\, and in theories with maximal supersymmetry. My 
 talk will be based on https://arxiv.org/pdf/2102.08951.pdf\n
LOCATION:https://researchseminars.org/talk/EASW/17/
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