نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه فیزیک، پردیس نسیبه، دانشگاه فرهنگیان، صندوق پستی: 1998963341، تهران- ایران
2 پژوهشگاه دانش‌های بنیادی، پژوهشکده ذرات و شتاب‌گرها، صندوق پستی: 193955531، تهران ـ ایران
چکیده
در این مقاله توابع ساختار قطبیده‌ی هسته‌های و در مرتبه دوم دیاگرام فاینمن با و بدون در نظر گرفتن تقارن (3)SU برای وابستگی اسپینی در توزیع‌های پارتونی نوکلئون‌ها محاسبه می‌شود. به همین منظور ابتدا تابع ساختار قطبیده نوکلئون‌های موجود در هسته توسط چند جمله‌ای‌های ژاکوبی به‌دست می‌آیند. در این ارتباط از توابع توزیع پارتونی قطبیده که از دو مدل پدیده شناختی متفاوت و رایج حاصل شده‌اند استفاده می‌شود. در نهایت تصحیحات هسته‌ای مؤثر بر روی توابع ساختار هسته‌ای نیز در نظر گرفته می‌شوند. نتایج حاصل نشان می‌دهد که در مجموع نمودارهای توابع ساختار هسته‌ای قطبیده‌ی طولی ناشی از مدل پدیده شناختی دارای شکست تقارن با نتایج تجربی سازگاری بهتری دارند و برای توابع ساختار هسته‌ای قطبیده‌ی عرضی تفاوت قابل ملاحظه‌ای وجود ندارد.
کلیدواژه‌ها
عنوان مقاله [English]
The effect of decomposition of light-polarized sea quarks on 3He and 3H nucleuses
نویسندگان [English]
- F. Arbabifar 1
- Sh. Atashbar Tehrani 2
1 Department of Physics, Nasibeh Campus, University of Farhangian, P.O. Box: 1998963341, Tehran –Iran
2 School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O. Box: 193955531, Tehran - Iran
چکیده [English]
In this paper, the polarized structure functions of and nuclei have been computed in the second order of the Feynman diagram with and without considering SU(3) symmetry in spin dependence for the partonic distribution of nucleons. For this purpose and at first, the polarized structure functions of the nucleons in nuclei are obtained, using Jacobi polynomials. In this regard, two different and prevalent phenomenological models are used to obtain the required polarized partition distributions. Finally, in deriving the nuclear structure functions, effective nuclear corrections are also imposed. The results show that most of the plots for polarized nuclear longitudinal structure functions, resulted from the used phenomenological model whereas symmetry breaking is taken into account, are more compatible with the available experimental data, there is no considerable difference between the data compatibility with curves of both models for polarized nuclear transverse structure functions.
کلیدواژه‌ها [English]
- Nuclear polarize structure-function
- Symmetry breaking
- Jacobi polynomial
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