نقش پنگوئن الکتروضعیف و پنگوئن دو قطبی مغناطیسی QCD در واپاشی های هادرونی کوارک b

This research, works with the effective Hamiltonian and the quark model. Using, the decay rates of matter-antimatter of b quark was investigated. We described the effective Hamiltonian theory which was applied to the calculation of current-current (Q۱,۲), QCD penguin (Q۳,…,۶), magnetic dipole (Q۸) and electroweak penguin (Q۷,…,۱۰) decay rates. The gluonic penguin structure of hadronic decays b→qkg→qkqiqj was studied through the Wilson coefficients of the effective Hamiltonian. 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 b quark decays b→qiqkqj, qi{u,c}, qk{d,s}, qj{u,c} have been calculated. It was shown that, the electroweak penguin and magnetic dipole contributions in b quark decays are small and current-current operators are dominated.

Keywords:

کوارک b , پنگوئن QCD , پنگوئن الکتروضعیف , دوقطبی مغناطیسی