This thesis provides a relativistic description of electron-positron scattering and pair annihilation in quantum electrodynamics. By evaluating the modulus square of the invariant matrix elements, the differential ...

In this paper we employed the BSE methed to study the leptonic decays of -meson. By using lowest-order Feynman diagrams, detailed derivations of the invariant matrix element were made. The Feynman rules and trace algebra ...

The main purpose of this study is to provide the quantum description for the Vacuum polarization contribution to the radiative correction of the scattering of electron by coulomb potential. Using Feynman rules of quantum ...

Postoperative complication may be defined as negative outcome as perceived either by the surgeon or by the patients. It confers an increased risk of reoperation, prolonged length of stay, decline in disposition and increased ...

In this thesis, the covariant form of Dirac equation has been modified for a relativistic muon by incorporating the uniform background electric field through the principle of minimal coupling. The Electromagnetic (EM) field ...

this thesis, the electroweak description of neutrino-induced neutral weak transition between Sigma and Lambda hyperons is present. The norm-squared invariant element has been manipulated into a contraction between leptonic ...

In ideal Fermions system, at high temperature limit, quantum effects are small but when the temperature is lowered, quantum effects start becoming important. The main purpose of this study was to formulate thermodynamic ...

In this thesis, the main purpose was provided the electroweak description of elastic neutral current (NC) neutrino-nucleon scattering in the low energy region. The relativistic formalism has allowed us allows treating the ...