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Vanishing of the renormalized charge in electrodynamics and in meson theory

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Il Nuovo Cimento (1955-1965)

Summary

The author discusses the solutions of the quantum electrodynamics equations for the particles with spin 1/2 obtained by various authors firstly with one « smearing out » parameter and subsequently with two parameters. He proves in Sect. 1 that the solutions obtained are correct for all values of the non-renormalized electric chargee 1(e 1≪ 1 as well ase 1 ≫1), and that both theories lead to the conclusion that the renormalized chargee turns out to be zero. In Sect. 2 the author investigates if the same property holds also for the meson chargeg in the pseudoscalar theory. Using the two-limits technique developed by Abrikosov and Halatnikov, he comes to the conclusion that alsog turns out to be zero. In Sect. 3 the author considers in detail the problem of the vanishing of the renormalized meson charge examining the properties of the functionsG, D and Γ at arbitrary g1 2. The result of this analysis corresponds to the preceding conclusions, and confirms the vanishing ofg.

Riassunto

L’autore discute le soluzioni délie equazioni dell’elettrodinamica quantistica per le particelle con spin 1/2, soluzioni ottenute da vari autori dapprima con un solo parametro di « smearing out » e in seguito con due parametri. Egli dimostra nella Sez.1 che le soluzioni ottenute sono valide per tutti i valori della carica elettrica non rinormalizzata e2 (tanto per e1 ≪ 1 quanto per e2 ≫ 1), e che entrambe le teorie portano alla conclusione che la carica rinormalizzatae risulta essere zero. Nella Sez. 2 l’autore ricerca se la stessa proprietà valga anche per la carica mesonicag nella teoria pseudoscalare. Usando la teoria dei due limiti sviluppata da Abrikosov e Halatnikov, egli giunge alla conclusione che ancheg risulta essere zero. Nella Sez. 3 l’autore esamina minutamente il problema dello svanire della carica mesonica rinormalizzata esaminando le proprietà delle funzioniG, D eΓ per valori arbitrari di g1 2. Il risultato di questa analisi corrisponde alle conclusioni precedenti, e conferma lo svanire dig.

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Pomerančuk, I. Vanishing of the renormalized charge in electrodynamics and in meson theory. Nuovo Cim 3, 1186–1203 (1956). https://doi.org/10.1007/BF02785002

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  • DOI: https://doi.org/10.1007/BF02785002

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