- Al Hufuf, Eastern Province, Saudi Arabia
- King Faisal University, Physics, Faculty Memberadd
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The flavour changing neutral current decay b -> s gamma has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b-bbar events by the presence of a hard photon associated with a system... more
The flavour changing neutral current decay b -> s gamma has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b-bbar events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. The background processes are normalised from the data themselves. The inclusive branching
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Research Interests: Physics, Particle Physics, Flavour, Quark, Elsevier, and 3 moreLepton, Aleph, and strong coupling constant
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In this paper we present a complete classification scheme for kinetic energy operators (KEO's) describing a particle endowed with position-dependent mass (PDM). We first present a generalized formulation of KEO's with PDM and show... more
In this paper we present a complete classification scheme for kinetic energy operators (KEO's) describing a particle endowed with position-dependent mass (PDM). We first present a generalized formulation of KEO's with PDM and show that it is equivalent to three-parameter linear formulation. This reduces further to two independent parameters under Hermiticity condition. Based on this linear formulation we prove that, contrary to what was widely believed, von Roos family is not the most general ordering. We found an entire new family of Hermitian KEO's that does not fit into von Roos ordering. We were able to construct all the Hermitian KEO's and classify them into two-parameter classes. As one application, we solve the puzzling case of Yang and Yee KEO. We also find, under certain conditions, some kind of duality between von Roos ordering and one of the new classes.
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From approximately 3 million hadronic decays of Z bosons recorded with the ALEPH detector at LEP, a sample of 410 +/- 32 B0 -> D*+l-νl candidates is selected, where l is either an electron or a muon. The differential decay ratedΓ(B0... more
From approximately 3 million hadronic decays of Z bosons recorded with the ALEPH detector at LEP, a sample of 410 +/- 32 B0 -> D*+l-νl candidates is selected, where l is either an electron or a muon. The differential decay ratedΓ(B0 -> D*+l-νl)/(dω) from this sample is fitted, yielding a value for the product of the CKM matrix element Vcb and the normalisation of the decay form factor at the point of zero recoil of the D*+ meson F(ω = 1)Vcb = (31.4 +/- 2.3stat +/- 2.5syst) × 10-3. A value for Vcb is extracted using theoretical calculations of the form factor normalisation, with the result Vcb = (34.5 +/- 2.5stat +/- 2.7syst +/- 1.5theory) × 10-3. From the integrated spectrum, the measured branching fraction is Br(B0 -> D*+l-νl) = (5.18 +/- 0.30stat +/- 0.62syst)%.
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We solve the momentum space path integral for the D-dimensional harmonic oscillator in the context of some deformed commutation relations [\skew3\hat{X}_{i},\skew3\hat{P}_{\!\!j}] =i\hbar\delta_{ij}(1+\beta\!\skew3\hat{P}^{2}) leading to... more
We solve the momentum space path integral for the D-dimensional harmonic oscillator in the context of some deformed commutation relations [\skew3\hat{X}_{i},\skew3\hat{P}_{\!\!j}] =i\hbar\delta_{ij}(1+\beta\!\skew3\hat{P}^{2}) leading to isotropic nonzero minimal uncertainty in position coordinates. The exact energy spectrum and the corresponding normalized radial momentum space eigenfunctions are obtained from the spectral decomposition of the radial transition amplitude.
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The present work demonstrates that GEANT4 yields a consistent description of electron transport processes in semi-infinite homogeneous and heterogeneous extended media. This comparison covers the e− energy deposition profiles in a range... more
The present work demonstrates that GEANT4 yields a consistent description of electron transport processes in semi-infinite homogeneous and heterogeneous extended media. This comparison covers the e− energy deposition profiles in a range of elements from aluminum to tantalum through molybdenum at source energies from 0.3 to 1.0 MeV and at incident angles from 0° to 60°. The good agreement between simulation results and data confirms that the Monte Carlo used code is capable of accurate electron beam energy ...