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Toward the determination of the neutral weak form factors of the nucleons

Об определении нейтральных слабых форм-факторов нуклонов

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Il Nuovo Cimento A (1965-1970)

Summary

Experimental data on low-energy experiments (elastic scattering) and high-energy experiments (inclusive and semi-inclusive reactions) are analysed in order to get the form factors of the nucleons in interaction with the neutral weak current. The obtained values areG n.c.,pE (0)=−0.06±0.14,G n.c.,pM (0)=0.91±0.14,G n.c.,pA (0)=0.58±0.05,G n.c.,nE (0)=−0.78±0.17,G n.c.,nM (0)=−1.78±0.30,G n.c.,nA (0)=−0.57±0.09. Comparison with gauge model predictions selects Weinberg-Salam (with sin2 θw=0.255±0.025), Mohapatra-Sidhu and Lee-Weinberg models.

Riassunto

Si analizzano i dati sperimentali su esperimenti a bassa energia (scattering elastico) ed esperimenti ad alta energia (reazioni inclusive e seminclusive) per ottenere i fattori di forma dei nucleoni in interazione con la corrente neutra debole. Si ottengono i valoriG n.c.,pE (0)=−0.06±0.14,G n.c.,pM (0)=0.91±0.14,G n.c.,p.A (0)=0.58±0.05,G n.c.,nE (0)=−0.78±0.17,G n.c.,nM (0)=−1.78±0.30,G n.c.,nA (0)=−0.57±0.09. Il confronto con le previsioni dei modelli di gauge seleziona i modelli di Weinberg-Salam (con sin2 θw=0.255±0.025), Mohapatra-Sidhu e Lee-Weinberg.

Резюме

С целью получения форм-факторов нуклонов при взаимодействии с нейтральным слабым током анализируются экспериментальные данные по экспериментам при низких энергиях (упругое рассеяние) и по экспериментам при высоких энергиях (инклюзивные и полу-инклюзивные реакции). Полученные результаты представляют:G n.c.,pE (0)=−0.06±0.14,G n.c.,pM (0)=0.91±0.14,G n.c.,pA (0)=0.58±0.05,G n.c.,nE (0)=−0.78±0.17,G n.c.,nM (0)=−1.78±0.30,G n.c.,nA (0)=−0.57±0.09. Сравнение с предсказаниями калибровочных моделей выбирает модели Вейнберга-Салама (с sin2 θw=0.255±0.025), Мохапатра-Сидхи и Ли-Вейнберга.

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Cochard, G.M., Mouafakou, I.A. Toward the determination of the neutral weak form factors of the nucleons. Nuov Cim A 65, 239–254 (1981). https://doi.org/10.1007/BF02902137

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