We study the discovery potential of the Tevatron for a Z ′ gauge boson. We introduce a parametrization of the Z ′ signal which provides a convenient bridge between collider searches and specific Z ′ models. The cross section for pp → Z X → l+l−X depends primarily on the Z ′ mass and the Z ′ decay branching fraction into leptons times the average square coupling to up and down quarks. If the qua...

In 1969, Murray Gell-Mann won the nobel prize in physics “for his contributions and discoveries concerning the classification of elementary particles and their interactions.” He is the scientist who first used the word quark, and he was the first to describe the SU3(C) flavor symmetry of the hadrons. By organizing the particles according to the root system of the lie algebra su3(C) associated t...

We show that the assumption of type II seesaw mechanism for small neutrino masses coupled with b− τ mass unification in a minimal SUSY SO(10) model leads not only to a natural understanding of large atmospheric mixing angle (θ23) among neutrinos, as recently pointed out, but also to large solar angle (θ12) and a small θ13 ≡ Ue3 as required to fit observations. This is therefore a minimal, compl...

A non-minimal supersymmetric SO(10) × U (1) F grand unified model is developed based on the Yukawa structure of a model previously constructed in collaboration with S. Nandi to explain the quark and lepton masses and mixings in a particular neutrino scenario. The U (1) F family symmetry can be made anomaly-free with the introduction of one conjugate pair of SO(10)-singlet neutrinos with the sam...

Analytic formulae are given for QCD corrections to the lepton spectra in decays of polarised up and down type heavy quarks. These formulae are much simpler than the published ones for the corrections to the spectra of charged leptons originating from the decays of unpolarised quarks and polarised up type quarks. Distributions of leptons in semileptonic Λc and Λb decays can be used as spin analy...

We study the rare decays of B + c → D (*)+ q l ¯ l (q = d, s and l = ν l , e, µ, τ) in the standard model. The form factors are evaluated in the light front and constituent quark models, respectively. We find that the decay branching ratios calculated in the two models for B + c → D + q l ¯ l agree well with each other, whereas those for B

a Department of Natural Science & Public Health, Zayed University, PO Box 19282, Dubai, United Arab Emirates b Department of Biological Sciences, University of Windsor, Windsor, Ontario, Canada N9B3P4 c Department of Biology and Chemistry, American University of Sharjah, PO Box 26666, Sharjah, United Arab Emirates d United Nations University, International Network on Water, Environment and Heal...