967 citations
- Abdus Salam Centre for PhysicsPK8 papers
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11 papers · 1 filter
A Generalization of the Poincaré-Cartan Integral Invariant for a Nonlinear Nonholonomic Dynamical System
Naseer Ahmed, Muhammad Usman
Based on the d'Alembert-Lagrange-Poincaré variational principle, we formulate general equations of motion for mechanical systems subject to nonlinear nonholonomic constraints, that…
Baryon Modes of B Meson Decays
Fayyazuddin
The baryon decay modes of B,bar{B}-> N_{1}bar{N}_{2}(f), bar{N}_{1}N_{2}(bar{f}) provide a frame work to test CP-invariance in baryon sector. It is shown that in the rest frame of…
Collective Excitations Spectrum in Density Modulated One-Dimensional Electron Gas in a Magnetic Field
K. Sabeeh, M. Tahir
We determine the collective excitations spectrum and discuss the numerical results for a parabolically confined density modulated quasi-one dimensional electron gas (1DEG) in the p…
An SU(3) symmetry for light neutrinos
Riazuddin
It is proposed that light neutrinos form a triplet in a global SU(3) symmetry in mass eigenstate basis. Assuming that the SU(3)symmetry is broken in the direction (-alambda_{3}+fra…
Theory of Weiss oscillations in the magnetoplasmon spectrum of Dirac electrons in graphene
M. Tahir, K. Sabeeh
We present the collective excitations spectrum (magnetoplasmon spectrum) of Dirac electrons in a weakly modulated single graphene layer in the presence of a uniform magnetic field.…
Weiss oscillations in the electronic structure of modulated graphene
M Tahir, K Sabeeh, A MacKinnon
We present a theoretical study of the electronic structure of modulated graphene in the presence of a perpendicular magnetic field. The density of states and the bandwidth for the…