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SUMMARY:Gravitational Scattering from Bosonic Oscillators
DTSTART:20250409T124500Z
DTEND:20250409T140000Z
DTSTAMP:20260504T201300Z
UID:indico-event-14208@indico.math.cnrs.fr
CONTACT:cecile@ihes.fr
DESCRIPTION:Speakers: Kays Haddad (Humboldt-Universität zu Berlin)\n\nSé
 minaire Amplitudes et Gravitation sur l'Yvette (IHES/IPhT)\nIn this talk I
  present a new worldline action in which the worldline spin degrees of fre
 edom are carried by bosonic oscillators. First\, we construct a Hamiltonia
 n for the worldline accounting for all spin-multipole moments at linear or
 der in curvature\, investigating the constraints on the Hamiltonian from a
  specific choice for the spin supplementary condition (SSC). Converting to
  the Lagrangian\, we find a simple kinetic term for the spin DoFs in terms
  of bosonic oscillators\, and also break the quadratic-in-spin ceiling of 
 previous WQFT approaches involving Grassmann spinors. Injecting insight fr
 om the previously constructed Hamiltonian reveals a new class of operator 
 redundancies in the EFT not related to equations of motion or integration 
 by parts. Finally\, a simple on-shell condition neatly ties up considerati
 ons related to the SSC\, and paves the way for future higher-PM calculatio
 ns involving spin.\n \n \nPour être informé des prochains séminaires 
 vous pouvez vous abonner à la liste de diffusion en écrivant un mail à 
 sympa@listes.math.cnrs.fr avec comme sujet: "subscribe seminaire_physique 
 PRENOM NOM"(indiquez vos propres prénom et nom) et laissez le corps du me
 ssage vide.\n\nhttps://indico.math.cnrs.fr/event/14208/
LOCATION:Centre de conférences Marilyn et James Simons (IHES)
URL:https://indico.math.cnrs.fr/event/14208/
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