Strategy for detecting b polarization effects.
We suggest a strategy for detecting {ital b} polarization effects in {ital e}{sup +}{ital e}{sup {minus}} annihilation on {ital Z} resonance. Using two types of inclusive leptonic samples with different {Lambda}{sub {ital b}} fractions in {ital Z}{r_arrow}{ital b{bar b}} events, the {ital b} polarization effects may be detected without large uncertainties of {ital b} fragmentation and the {Lambda}{sub {ital b}} decay model.
The weak-magnetic moment of heavy quarks
Abstract With initial and final particles on-shell, the anomalous weak-magnetic dipole moments of b and c quarks are electroweak gauge invariant quantities of the effective couplings Zb b and Zc c , respectively, and good candidates to test the Standard Model and/or new physics. Here we present a complete computation of these quantities within the Standard Model. We show that decoupling properties with respect to heavy particles do take place in the weak magnetic moment. The obtained values, a b ( M Z 2 ) = (2.98 − 1.56 i ) × 10 −4 and a c ( M Z 2 ) = (−2.80 + 1.09 i ) × 10 −5 are dominated by one-gluon exchange diagrams. The electroweak corrections are less than 1% of the total magnitude.
The unfolded universe of elementary particles. A geometric explanation of the standard model structure
We propose a geometric explanation of the standard model of Glashow, Weinberg and Salam for the known elementary particles. Our model is a generic Quantum Field Theory in dimension four, obtained by developing along a Lorentz sub-manifold the lagrangian of Einstein and Dirac in dimension twelve. The main mechanism which gives birth to the standard model is a certain gauge fixing of triality, which permits to identify the multiplicity of fermions, as seen from the four dimensional world, with the eight unseen dimensions of the generating universe. In this way we get the known tables of particles, explaining the series of fermions and the gauge bosons. We suggest that the Higgs field dynamics could appear through a bosonization of the right handed neutrino and correspond to a displacement in the unseen dimensions. We also propose hypotheses for dark matter, and perhaps dark energy. Then we suggest predictions to go beyond the standard model.