Bottom quark pole mass and |Vcb | matrix

Bottom quark mass and |Vcb | matrix element

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...

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...

Perturbative Strong Interaction Corrections to the Heavy Quark Semileptonic Decay Rate

We calculate the part of the order αs correction to the semileptonic heavy quark decay rate proportional to the number of light quark flavors, and use our result to set the scale for evaluating the strong coupling in the order αs term according to the scheme of Brodsky, Lepage and Mackenzie. Expressing the decay rate in terms of the heavy quark pole mass mQ, we find the scale for the MS strong ...

Properties of Fermion Mixings in Intersecting D - brane Models

We consider the Yukawa couplings for quarks and leptons in the context of Pati-Salam model using intersecting D-brane models where the Yukawa coupling matrices are rank one in a simple choice of family replication. The CKM mixings can be explained by perturbing the rank 1 matrix using higher order terms involving new Higgs fields available in the model. We show that the near bi-large neutrino m...