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7 papers · 2 filters
Electroweak unification of quarks and leptons in a gauge group
Fayyazuddin
A model for electroweak unification of quarks and leptons, in a gauge group is constructed. The model requires, three generations of quarks a…
Spin-orbit splittings in heavy-light mesons and Dirac equation
Riazuddin, Sidra Shafiq
The spin-orbit splitting in heavy-light mesons is seen to be suppressed experimentally. It is shown that it can be understood qualitatively in the frame work of Dirac theory. An al…
and neutrino mass matrix with an approximate flavor symmetry
Riazuddin
For a neutrino mass matrix whose texture has an approximate flavor symmetry and where one has near degenerate neutrino mass, it is shown that the tribimaximal values for atmospheri…
Dynamical Symmetries of Dirac Hamiltonian
Riazuddin
Several dynamical symmetries of the Dirac Hamiltonian are reviewed in a systematic manner and the conditions under which such symmetries hold. These include relativistic spin and o…
K_1(1270)-K_1(1400) mixing and the fourth generation SM effects in B-->K_1l^+l^- decays
Aqeel Ahmed, Ishtiaq Ahmed, M. Ali Paracha +1
The implications of the fourth generation quarks in the B-->K_{1}(1270,1400)l^{+}l^{-} with l=mu, tau decays are studied, where the mass eigenstates K_{1}(1270) and K_{1}(1400) are…
Complementarity of Semileptonic to and Decays in the Standard Model with Fourth Generation
Muhammad Junaid, M. Jamil Aslam
The decays are analyzed in the Standard Model extended to fourth generation of quarks (SM4). The decay rate, forward-backward…