I will review the measurements of the b-quark mass performed by ALEPH and DELPHI. A large set of ob-servables has been used together with detailed studies on jet algorithms. Very clear effects due to the b-quark mass running are observed. Comparing with the determinations at the Υ(4S) threshold, the measurements of the running b-quark mass at the Z pole are consistent with the predicted evoluti...

The semileptonic decay of a b-quark, b → clν, is considered in the relativistic limit where the decay products are approximately collinear. Analytic results for the double differential lepton energy distributions are given for finite charm-quark mass. Their use for the fast simulation of isolated lepton backgrounds from heavy quark decays is discussed.

CP violation can be observed in B decays when a given process depends upon interference between two weak amplitudes which have different CP-violating phases. Since most weak decay diagrams have quark lines where each has a definite flavor label, neutral mesons which are flavor mixtures are particularly interesting. Different diagrams can contribute to the different flavor components of the meso...

We investigate the heavy baryons which arise as solitonic excitations in a “heavy meson” chiral Lagrangian which includes the light vector particles. It is found that the effect of the light vectors may be substantial. We also present a simple derivation which clearly shows the connection to the CallanKlebanov approach.

We show that hadronization via quark coalescence enhances hadron elliptic flow at large p(perpendicular) relative to that of partons at the same transverse momentum. Therefore, compared to earlier results based on covariant parton transport theory, more moderate initial parton densities dN/deta(b=0) approximately 1500-3000 can explain the differential elliptic flow v(2)(p(perpendicular)) data f...

Single-top-quark production via W -gluon fusion at hadron colliders provides an opportunity to directly probe the charged-current interaction of the top quark. We calculate the next-to-leading-order corrections to this process at the Fermilab Tevatron, the CERN Large Hadron Collider, and DESY HERA. Using a b-quark distribution function to sum collinear logarithms, we show that there are two ind...

We review the theory and phenomenology of heavy-quark symmetry, exclusive weak decays of B mesons, inclusive decay rates and lifetimes of b hadrons. To appear in the Second Edition of Heavy Flavours, edited by A.J. Buras and M. Lindner (World Scientific, Singapore) CERN-TH/97-24 February 1997 B DECAYS AND THE HEAVY-QUARK EXPANSION MATTHIAS NEUBERT Theory Division, CERN, CH-1211 Geneva 23, Switz...

O(α s) radiative corrections to polarized top decay into a charged Higgs t(↑) → H + + b Abstract We calculate the O(α s) radiative corrections to polarized top quark decay into a charged Higgs and a bottom quark in Two-Higgs-Doublet-Models for nonzero bottom quark masses m b = 0. The radiative corrections to the polarization asymmetry parameter of the decay can become as large as 25 %. We provi...

I compare the anticipated properties of the top quark with what is known experimentally about the heaviest fermion. I review the scienti c opportunities that will be presented in the near future by copious samples of top. These include re ned tests of electroweak radiative corrections, studies of the nature of top itself, and exploration of electroweak symmetry breaking. I conclude by illustrat...