Summary
The theory of the renormalization group is used in order to show that for large momentum transfer the perturbation expansion in α of the differential cross-section for the scatteringo f an electron by a potential in first order Born approximation is expanded in terms of the effective parameter (α/π) ln (q 2/m 2). (q=invariant momentum transfer,m=electron rest mass;q/m≫1.)
Riassunto
Si fa uso della teoria del gruppo di rinormalizzazione allo scopo di mostrare come per grandi trasferimenti di impulso lo sviluppo inα della perturbazione della sezione d’urto differenziale per lo scattering di un elettrone da parte di un potenziale nella approssimazione di Born di primo ordine si effettui in termini del parametro effettivo (α/π) ln (q 2/m 2) (q=trasferimento invariabile dell’impulso,m=massa di riposo dell’elettrone;q/m≈1).
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References
K. E. Eriksson andA. Peterman:Phys. Rev. Lett.,5, 444 (1960).
The existence of this group was first noticed byStueckelberg andPeterman (2). Further developments were made byBogoliubov andShirkov (3), who used the properties of the group to investigate the asymptotic behaviour of Green’s functions.
E. C. G. Stueckelberg andA. Peterman:Helv. Phys. Acta,24, 317 (1951);Helv. Phys. Acta,26, 499 (1953).
N. N. Bogoliubov andD. V. Shirkov:Introduction to the Theory of Quantized Fields (New York, London, 1959), Sect.42–44. This book contains further references.
K. E. Eriksson:Nuovo Cimento,19, 1010 (1961).
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Eriksson, K.E. High-energy behaviour of electromagnetic scattering cross-sections. Nuovo Cim 19, 1044–1052 (1961). https://doi.org/10.1007/BF02731245
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DOI: https://doi.org/10.1007/BF02731245