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Statut |
Confirmé |
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Série |
SEED |
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Domaines |
math-ph |
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Date |
Mercredi 4 Mars 2026 |
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Heure |
10:45 |
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Institut |
IHES |
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Salle |
Amphithéâtre Léon Motchane |
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Nom de l'orateur |
Doroudiani |
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Prenom de l'orateur |
Mehregan |
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Addresse email de l'orateur |
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Institution de l'orateur |
University of Southampton |
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Titre |
Scattering amplitude of closed strings at genus one |
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Résumé |
Perturbative calculations of string amplitudes are twofold: an expansion in the
string coupling (the genus expansion of the worldsheet) and a low-energy expansion
in the momenta. In this talk, I will focus on the low-energy expansion of closed
string amplitudes at genus one, specifically for four- and five-point massless
states of type IIB superstrings in flat spacetime. Evaluating these amplitudes
involves integrating over the moduli space of punctured tori. I will demonstrate
how the formalism of equivariant iterated Eisenstein integrals can be used to
systematically calculate these integrals. Additionally, I will discuss the
implications of these results for the S-duality of type IIB and conclude by
exploring the underlying number-theoretic aspects of string amplitudes. |
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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