Testing the Scalar Weak Gravity Conjecture in No-scale Supergravity - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2023

Testing the Scalar Weak Gravity Conjecture in No-scale Supergravity

Tony Gherghetta
  • Fonction : Auteur
Keith A Olive
  • Fonction : Auteur
Sarunas Verner
  • Fonction : Auteur

Résumé

We explore possible extensions of the Weak Gravity Conjecture (WGC) to scalar field theories. To avoid charged black hole remnants, the WGC requires the existence of a particle with a mass $m < g q M_P$, with charge $q$ and U(1) gauge coupling $g$, allowing the decay to shed the black hole charge. Although there is no obvious problem that arises in the absence of a U(1) charge, it has been postulated that gravity must remain the weakest force even when extended to scalar interactions. Quantifying this conjecture may be done by comparing scalar and gravitational amplitudes, or as we advocate here by comparing scattering cross sections. In theories with non-trivial field space geometries, by working out examples with perturbation theory around arbitrary field values and performing tadpole resummations, we argue that the conjecture must be applied only at the extrema of the scalar potential (when expressed in locally canonical coordinates). We consider several toy models in the context of no-scale supergravity and also consider examples of inflationary models.

Dates et versions

hal-04113324 , version 1 (01-06-2023)

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Citer

Emilian Dudas, Tony Gherghetta, Keith A Olive, Sarunas Verner. Testing the Scalar Weak Gravity Conjecture in No-scale Supergravity. 2023. ⟨hal-04113324⟩
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