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العنوان
The mesons and quarks as degrees of freedom in prediction of ground state energy for some nuclei /
المؤلف
Asr, Rabab Hussein Mohammed Hussein,
هيئة الاعداد
باحث / رباب حسين محمد حسين
مشرف / كمال ملاك حنا
مناقش / لطفى ابراهيم ابو سليم
مناقش / اسماء جبر شلبى
مناقش / شبانة محمد سويلم
تاريخ النشر
2020
عدد الصفحات
73p.:
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
فيزياء المادة المكثفة
تاريخ الإجازة
1/1/2020
مكان الإجازة
جامعة بنها - كلية العلوم - الفيزياء
الفهرس
Only 14 pages are availabe for public view

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from 92

Abstract

Abstract
The interaction of Nucleon-Nucleon (NN) has certain physical characteristics,
which indicated by nucleon, meson and quark degrees of freedom. The main
purpose of this work is calculating the ground state energies of 21
H and 42
He
nuclei through the two-body system with the exchange of two (; !), three
(; ; !), and four (; ; !; ) mesons that mediated between two nucleons,
each one of these calculations is considered beside the quark-quark interaction
in the constructed hybrid model. The calculations are divided into two parts:
The rst part deals with the meson exchange between two nucleons through
the approach of one-boson exchange potential (OBEP) based on the quasirelativistic
decoupled Dirac equation and self-consistent Hartree-Fock formulation,
where each nucleon acts as a source of pseudoscalar , scalar , and
vector elds !; . The OBEP is analytically derived with two static functions
of meson, the single particle energy dependent (SPED) and generalized
Yukawa (GY) functions.
The obtained theoretical results are compared with other theoretical models
and their corresponding experimental data, it is found that the SPED function
gives a satis ed agreement more than the GY function in case of the considered
nuclei. The contribution of -meson is more clear than -meson since,
the considered nuclei are light and the repulsive e ect of -meson demands
more massive nuclei. The ground state energies are well reproduced by using
all possible degrees of freedom according to our interest