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Full-Text Articles in Physical Sciences and Mathematics
Inclusive Decays B->Dx And B->D*X, L. Gibbons, Manoj Thulasidas
Inclusive Decays B->Dx And B->D*X, L. Gibbons, Manoj Thulasidas
Research Collection School Of Computing and Information Systems
We report new measurements of the differential and total branching ratios for inclusive B decay to D-0, D+, and D*+ and the first measurement of the same quantities for inclusive B decay to D-*0. Here B is the mixture of B-d and B-u from Y(4S) decay. Furthermore, since more than one charm particle (or antiparticle) of the same kind can be produced in B decay, here ''inclusive B branching ratio'' is used to mean the average number of charm particles and their antiparticles of a certain species: produced in B decay. We obtain the following results (the first error is …
A Measurement Of Rb Using A Lifetime-Mass Tag, R. Barate, Manoj Thulasidas
A Measurement Of Rb Using A Lifetime-Mass Tag, R. Barate, Manoj Thulasidas
Research Collection School Of Computing and Information Systems
ALEPH's published measurement of Rb = Γ(Ζ → bb̄)/Γ(Ζ → hadrons) using a lifetime tag is updated using the full LEP 1 data sample. Considerable effort has been devoted to understanding systematic effects. Charm background is better controlled by combining the lifetime tag with a tag based on the b/c hadron mass difference. Furthermore, the algorithm used to reconstruct the event primary vertex is designed so as to reduce correlations between the two hemispheres of an event. The value of Rb is measured to be 0.2167 ± 0.0011 (stat) ± 0.0013 (syst).