The value of the b quark mass at the M Z scale deened in the MS renormalization scheme, m b (M Z), was determined using 2.8 million data events collected during This analysis, performed at an energy far from the bb production threshold, connrms the running of the b-quark mass and establishes the rst experimental evidence of the running of any fermion mass.

We consider the possibility of extracting the bottom quark mass from LEP data. The inclusive decay rate for Z → bb̄ + · · · is obtained at order αs by summing up the one-loop two-parton decay rate to the tree-level three-parton rate. We calculate the decay width of the Z-boson into two and three jets containing the b-quark including complete quark mass effects. In particular, we give analytic re...

We study the properties of the B → π and B → K transition form factors in partially quenched QCD by using the approach of partially quenched chiral perturbation theory combined with the static heavy quark limit. We show that the form factors change almost linearly when varying the value of the sea quark mass, whereas the dependence on the valence quark mass contains both the standard and chiral...

following our previous presentation of a new three-fold symmetry for derivation of the magic numbers of nuclei based upon a quark state model of nuclei, here the nuclear binding energy is obtained from such new perspective. from this point of view, since each nucleon is made of three quarks, the binding energy of nuclei contains a volume term proportional to 3a (a is mass number). by considerin...

I review some of the recent developments in the theoretical description of weak inclusive decays of heavy mesons. The topics cover the value of |Vcb| as extracted from semileptonic inclusive decays and a short discussion of the theoretical errors. I also present the results of a recent calculation of next–to–leading order corrections to nonleptonic inclusive B decays which allows an improved pr...