Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 18 Mai 2017
Heure 10:00
Institut IHP
Salle 314
Nom de l'orateur Carrasco
Prenom de l'orateur John Joseph
Addresse email de l'orateur
Institution de l'orateur IPhT Saclay
Titre Generalized Double Copy and N=8 Supergravity at Five Loops
Résumé Recent conceptual and technical advances have allowed us to delve further than ever before into the quantum corrections to scattering amplitudes, perhaps nature's most perfect microscopic structures. Doing so we have uncovered surprisingly powerful relations known as the color- kinematic duality, and associated double-copy structure, universal to many theories from the entirely formal to the utterly effective; applicable to processes from pion scattering to cosmic inflation. Using the color-kinematic duality to construct double-copy amplitudes has tremendous computational advantages, but manifesting the necessary duality can be challenging at higher loops. After a gentle introduction to the ideas and tools at the heart of modern multi-loop integrand construction, I will introduce a new approach that starts from generic gauge-theory integrands, and applies a universal double-copy procedure to obtain gravity integrands that include contact terms generated by any single-copy violations of dual Jacobi identities. I will demonstrate with three-, four- and five-loop examples in maximal supergravity.
Numéro de preprint arXiv
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