Measurement of the B+ and B0 Lifetimes using Topological Vertexing at SLD
- SLAC
The lifetimes of B{sup +} and B{sup 0} mesons have been measured using a sample of 200,000 hadronic Z{sup 0} decays collected by the SLD experiment at the SLC between 1993 and 1996. The analysis is an improvement of the inclusive topological measurement recently reported and includes the 50,000 hadronic Z{sup 0} decays collected in 1996 with the SLD upgrade vertex detector. A high statistics sample of 12841 (7942) charged (neutral) vertices with good charge purity is obtained. The charge purity is enhanced by using the vertex mass, the SLC electron beam polarization (63% for 1993 and 77% for 1994-6) and an opposite hemisphere jet charge technique. Lifetime fits for the full data sample yield: {tau}{sub B{sup +}} = 1.698 {+-} 0.040(stat) {+-} 0.046(syst) ps, {tau}{sub B{sup 0}} = 1.581 {+-} 0.043(stat) {+-} 0.061(syst) ps, {tau}{sub B{sup +}}/{tau}{sub B{sup 0}} = 1.072 {+-} {sub 0.049}{sup 0.052}(stat) {+-} 0.038(syst).
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 826631
- Report Number(s):
- SLAC-PUB-7635
- Country of Publication:
- United States
- Language:
- English
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