dc.creatorFranchino Viñas, Sebastián Alberto
dc.creatorGies, Holger
dc.date2019
dc.date2022-02-03T15:40:01Z
dc.date.accessioned2023-07-15T05:15:15Z
dc.date.available2023-07-15T05:15:15Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/130420
dc.identifierissn:2470-0010
dc.identifierissn:2470-0029
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7472664
dc.descriptionWe use the worldline representation for correlation functions together with numerical path integral methods to extract nonperturbative information about the propagator to all orders in the coupling in the quenched limit (small-N<sub>f</sub> expansion). Specifically, we consider a simple two-scalar field theory with cubic interaction (S²QED) in four dimensions as a toy model for QED-like theories. Using a worldline regularization technique, we are able to analyze the divergence structure of all-order diagrams and to perform the renormalization of the model nonperturbatively. Our method gives us access to a wide range of couplings and coordinate distances. We compute the pole mass of the S²QED electron and observe sizable nonperturbative effects in the strong-coupling regime arising from the full photon dressing. We also find indications for the existence of a critical coupling where the photon dressing compensates the bare mass such that the electron mass vanishes. The short distance behavior remains unaffected by the photon dressing in accordance with the power-counting structure of the model.
dc.descriptionFacultad de Ciencias Exactas
dc.formatapplication/pdf
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by/4.0/
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.subjectCiencias Exactas
dc.subjectFísica
dc.subjectNonperturbative effects in field theory
dc.subjectQuantum electrodynamics
dc.subjectPath-integral Monte Carlo
dc.titlePropagator from nonperturbative worldline dynamics
dc.typeArticulo
dc.typeArticulo


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