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Effective Hamiltonian of Electroweak Penguin for Hadronic b Quark Decays | ||
| Journal of Sciences, Islamic Republic of Iran | ||
| مقاله 8، دوره 20، شماره 2، شهریور 2009 اصل مقاله (308.91 K) | ||
| نویسنده | ||
| H. Mehrban | ||
| چکیده | ||
| In this research we work with the effective Hamiltonian and the quark model. We investigate the decay rates of matter-antimatter of quark. We describe the effective Hamiltonian theory and apply this theory to the calculation of current-current ( ), QCD penguin ( ), magnetic dipole ( ) and electroweak penguin ( ) decay rates. The gluonic penguin structure of hadronic decays is studied through the Wilson coefficients of the effective Hamiltonian. We calculate the branching ratios of the tree-level, effective Hamiltonian, effective Hamiltonian including electroweak Penguin, effective Hamiltonian including Magnetic Dipole and the effective Hamiltonian including electroweak Penguin and Magnetic Dipole quark decays , , , . We show that, the electroweak Penguin and Magnetic Dipole contributions in b quark decays are small and Current-Current operators are dominant. | ||
| کلیدواژه‌ها | ||
| b quark؛ Effective Hamiltonian؛ Electroweak penguin؛ Gluonic penguin | ||
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آمار تعداد مشاهده مقاله: 1,436 تعداد دریافت فایل اصل مقاله: 1,769 |
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