B Decay Studies at SLD

1999/03/25 by Mark R. Convery, Convery, Mark R., Representing the SLD Collaboration +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/9903061

12 Pages, 4 Figures. Contribution to DPF '99

arxiv created 1999/03/25 · arxiv updated 2009/11/30

Abstract

We present three preliminary results from SLD on B decays: an inclusive search for the process b-> s gluon, a measurement of the branching ratio for the process B -> D D-bar X, and measurements of the charged and neutral B lifetimes. All three measurements make use of the excellent vertexing efficiency and resolution of the CCD Vertex Detector and the first two make use of the excellent particle identification capability of the Cherenkov Ring Imaging Detector. The b->sg analysis searches for an enhancement of high momentum charged kaons produced in B decays. Within the context of a simple, Jetset-inspired model of b->sg, a limit of BR(b->sg) < 7.6% is obtained. The B -> D D-bar X analysis reconstructs two secondary vertices and uses identified charged kaons to determine which of these came from charm decays. The result of the analysis is BR(B -> D D-bar X) = (16.2 +/- 1.9 +/- 4.2)%. The results of lifetime analysis are: τ_B⁺ = 1.686 +/-0.025 +/- 0.042 ps, τ_B⁰ = 1.589 +/- 0.026 +/- 0.055 ps and τ_B⁺/τ_B⁰ = 1.061 +/- ^0.031_0.029 +/- 0.027.

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