Summary
By expressing Feynman digrams as dispersion integrals with a finite cut-off, we calculate to lowest order the renormalization constantsZ 1,Z 2,Z 3, for a Yukawa coupling. By setting eachZ equal to zero we obtain the approximate solutionsg 2/4π=0 (30) and μ/m≲0.2 with a cut-off of about 3 nucleon masses.
Riassunto
Esprimendo i diagrammi di Feynman come integrali di dispersione con un taglio finito, si calcolano, nell ’ordine più basso, le costanti di rinormalizzazioneZ 1,Z 2,Z 3, per un accoppiamento di Yukawa. Ponendo ciascunaZ uguale a zero, si ottengono le soluzioni approssimateg 2/4π=0 (30) ed μ/m≲0.2 con un taglio di circa 3 masse nucleoniche.
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References
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See for instance,R. J. Eden:Lectures on the use of Perturbation Methods in Dispersion Theory, technical report no. 211 (University of Maryland, 1961).
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The research reported in this document has been sponsored in part by Air Force Office of Scientific Research, OAR, through the European Office, Aerospace Research, United States Air Force.
Traduzione a cura della Redazione.
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Delbourgo, R. Calculation of the Yukawa coupling constant. Nuovo Cim 27, 1431–1438 (1963). https://doi.org/10.1007/BF02785637
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DOI: https://doi.org/10.1007/BF02785637