Bottom quark mass and |Vcb | matrix element

Bottom quark pole mass and |Vcb | matrix

Inclusive Decays of Bottom Hadrons in New Formulation of Heavy Quark Effective Field Theory

We apply the new formulation of heavy quark effective field theory (HQEFT) to the inclusive decays of bottom hadrons. The long-term ambiguity of using heavy quark mass or heavy hadron mass for inclusive decays is clarified within the framework of the new formulation of HQEFT. The 1/mb order corrections are absent and contributions from 1/mb terms are calculated in detail. This enables us to rel...

A new ansatz: Fritzsch Mass Matrices with least modification

We investigate how the Fritzsch ansatz for the quark mass matrices can be modified in the least possible way to accommodate the observed large top quark mass and the measured values of the CKM elements. As one of the solutions, we find that the {23} and the {32} elements of the up quark mass matrix are unequal. The rest of the assumptions are same as in Fritzsch ansatz. In this formalism we hav...

New DELPHI Results from Semileptonic b, c Decays

The value of the |Vcb| element in the CKM quark mixing matrix was computed from the differential decay width of the process B → D∗+l−ν, measured as a function of the product ω of the B and D∗ 4-velocities, using an inclusive method of D∗ reconstruction: |Vcb| = 41.70 ± 2.35(exp.)± 1.38(th.) × 10−3 A measurement of the ratio |Vub| |Vcb| has been obtained by using the reconstructed secondary hadr...

ar X iv : h ep - p h / 93 12 29 8 v 1 1 6 D ec 1 99 3 Quark structure and weak decays of heavy mesons

BONN TK-93-18 Abstract: We investigate the quark structure of D and B mesons in the framework of a constituent quark model. To this end, we assume a scalar confining and a one gluon exchange (OGE) potential. The parameters of the model are adopted to reproduce the meson mass spectrum. From a fit to ARGUS and CLEO data on B → Dlν semileptonic decay we find for the Cabbibo Kobayashi Maskawa matri...