Summary
The relativistic pair current and contributions of nucleon isobars are evaluated in the constituent-quark model. Isovector charge and isoscalar current contributions change substantially compared to previous calculations. The magnetic form factor of the deuteron and the charge form factors of3He and3H are modifed significantly and the previously predicted large differences in the form factors of3He and3H are considerably reduced.
Riassunto
Si valutano la corrente della coppia relativistica e i contributi delle isobare nucleoniche nel modello a quark costituenti. I contributi della carica isovettoriale e della corrente isoscalare cambiano sostanzialmente rispetto a calcoli precedenti. Il fattore di forma magnetico del deuterone e i fattori di forma della carica di3He e4H sono modificati in modo significativo e le grandi differenze precedentemente previste nei fattori di forma di3He e3H sono notevolmente ridotte.
Резюме
В рамках кварковой модели оценивает релятивистский ток пар и вклады нуклонных изобар. Вклады изовекторного заряда и изоскалярного тока существенно изменяют предыдущие вычисления. Существенно изменяются магнитный форм-фактор дейтрона и зарядовые форм-факторы3He и3H. Ранее предсказанные большие различия в форм-факторах3He и3H значительно уменьшаются.
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Work supported in part by the Deutsche Forschungsgemeinschaft (SFB 0201) and the Istituto Nazionale di Fisica Nucleare, Sezione di Genova.
Traduzione a cura della Redazione.
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Drechsel, D. Contributions of internal nucleon structure to the nuclear charge and current operators. Nuov Cim A 76, 388–405 (1983). https://doi.org/10.1007/BF02833735
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DOI: https://doi.org/10.1007/BF02833735