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SUMMARY:String Theory from Maximal Supersymmetry
DTSTART:20260527T124500Z
DTEND:20260527T140000Z
DTSTAMP:20260613T204800Z
UID:indico-event-16614@indico.math.cnrs.fr
CONTACT:cecile@ihes.fr
DESCRIPTION:Speakers: Aidan Herderschee (IAS)\n\nSéminaire Amplitudes et 
 Gravitation sur l'Yvette (IHES/IPhT)\nI will study planar\, maximally supe
 rsymmetric 4d EFTs that reduce to ${\\mathcal N} = 4$ SYM at low energies 
 and show that novel constraints arise from the six-point amplitude. By con
 structing the six-scalar amplitude and imposing supersymmetry together wit
 h standard tree-level factorization\, assuming parity-even scalar contact 
 terms\, I find striking nonlinear relations among the four-point Wilson co
 efficients. These relations collapse much of the naive EFT parameter space
 . When combined with positivity bounds from unitarity and causality\, the 
 allowed region in Wilson-coefficient space shrinks to a thin sliver conver
 ging on the open-superstring Veneziano amplitude\, strongly suggesting tha
 t maximal supersymmetry singles out the tree-level string answer. More bro
 adly\, the result shows that higher-point amplitudes contain qualitatively
  new bounds on the space of EFTs\, and that the space of consistent quantu
 m field theories may be much smaller than current four-point analyses sugg
 est.\n \nPour être informé des prochains séminaires vous pouvez vous a
 bonner à la liste de diffusion en écrivant un mail à sympa@listes.math.
 cnrs.fr avec comme sujet: "subscribe seminaire_physique PRENOM NOM"(indiqu
 ez vos propres prénom et nom) et laissez le corps du message vide.\n\nhtt
 ps://indico.math.cnrs.fr/event/16614/
LOCATION:Centre de conférences Marilyn et James Simons (IHES)
URL:https://indico.math.cnrs.fr/event/16614/
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