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Statut |
Confirmé |
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Série |
IPHT-MAT |
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Domaines |
hep-th |
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Date |
Mercredi 4 Septembre 2019 |
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Heure |
14:15 |
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Institut |
IPHT |
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Salle |
Salle Claude Itzykson, Bât. 774 |
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Nom de l'orateur |
Stefano Andriolo |
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Prenom de l'orateur |
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Addresse email de l'orateur |
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Institution de l'orateur |
Hong Kong University of Science and Technology |
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Titre |
A Tower Weak Gravity Conjecture from Infrared Consistency |
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Résumé |
We analyze infrared consistency conditions of 3D and 4D effective field theories with massive scalars or fermions charged under multiple $U(1)$ gauge fields. At low energies, one can integrate out the massive particles and thus obtain a one-loop effective action for the gauge fields. In the regime where charge-independent contributions to higher-derivative terms in the action are sufficiently small, it is then possible to derive constraints on the charge-to-mass ratios of the massive particles from requiring that photons propagate causally and have an analytic S-matrix. We thus find that the theories need to contain bifundamentals and satisfy a version of the weak gravity conjecture known as the convex-hull condition. Demanding self-consistency of the constraints under Kaluza-Klein compactification, we furthermore show that, for scalars, they imply a stronger version of the weak gravity conjecture in which the charge-to-mass ratios of an infinite tower of particles are bounded from below. We find that the tower must again include bifundamentals but does not necessarily have to occupy a charge (sub-)lattice. |
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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