Study of QED singular properties for variable gyromagnetic ratio g≃2

Johann Rafelski; Stefan Evans; Lance Labun

doi:10.1103/PhysRevD.107.076002

Study of QED singular properties for variable gyromagnetic ratio g≃2

Johann Rafelski, Stefan Evans, Lance Labun

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Abstract

Using the external-field method, i.e., evaluating the effective action Veff for an arbitrarily strong constant and homogeneous field, we explore nonperturbative properties of QED allowing arbitrary gyromagnetic ratio g. We find a cusp at g=2 in (a) The QED b0-renormalization group coefficient, and in the infinite-wavelength limit in (b) a subclass containing the pseudoscalar P2n=(E→·B→)2n of light-light scattering coefficients. Properties of b0 imply for certain domains of g asymptotic freedom in an Abelian theory.

Original language	English (US)
Article number	076002
Journal	Physical Review D
Volume	107
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.107.076002
State	Published - Apr 1 2023

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevD.107.076002

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abstract = "Using the external-field method, i.e., evaluating the effective action Veff for an arbitrarily strong constant and homogeneous field, we explore nonperturbative properties of QED allowing arbitrary gyromagnetic ratio g. We find a cusp at g=2 in (a) The QED b0-renormalization group coefficient, and in the infinite-wavelength limit in (b) a subclass containing the pseudoscalar P2n=(E→·B→)2n of light-light scattering coefficients. Properties of b0 imply for certain domains of g asymptotic freedom in an Abelian theory.",

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AU - Evans, Stefan

AU - Labun, Lance

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N2 - Using the external-field method, i.e., evaluating the effective action Veff for an arbitrarily strong constant and homogeneous field, we explore nonperturbative properties of QED allowing arbitrary gyromagnetic ratio g. We find a cusp at g=2 in (a) The QED b0-renormalization group coefficient, and in the infinite-wavelength limit in (b) a subclass containing the pseudoscalar P2n=(E→·B→)2n of light-light scattering coefficients. Properties of b0 imply for certain domains of g asymptotic freedom in an Abelian theory.

AB - Using the external-field method, i.e., evaluating the effective action Veff for an arbitrarily strong constant and homogeneous field, we explore nonperturbative properties of QED allowing arbitrary gyromagnetic ratio g. We find a cusp at g=2 in (a) The QED b0-renormalization group coefficient, and in the infinite-wavelength limit in (b) a subclass containing the pseudoscalar P2n=(E→·B→)2n of light-light scattering coefficients. Properties of b0 imply for certain domains of g asymptotic freedom in an Abelian theory.

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Study of QED singular properties for variable gyromagnetic ratio g≃2

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