Measurement of the B{sup +} and B{sup 0} lifetimes using topological vertexing at SLD
The lifetimes of B{sup +} and B{sup 0} mesons have been measured using a sample of 400,000 hadronic Z{sup 0} decays collected by the SLD experiment at the SLC between 1993 and 1998. This inclusive topological measurement includes 250,000 hadronic Z{sup 0} decays collected since 1996 with the SLD upgrade vertex detector. A high statistics sample of 30,028 (19,636) 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, 77% for 1994--6 and 73% for 1997--8) and an opposite hemisphere jet charge technique. Lifetime fits for the full data sample yield the following preliminary results: {tau}{sub B{sup +}} = 1.686 {+-} 0.025(stat) {+-} 0.042(syst) ps, {tau}{sub b{sup 0}} = 1.589 {+-} 0.026(stat) {+-} 0.055(syst) ps, {tau}{sub B{sup +}}/{tau}{sub B{sup 0}} = 1.061 {+-} 0.031/0.029(stat) {+-} 0.027(syst).
- Research Organization:
- Stanford Univ., Stanford Linear Accelerator Center, CA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 674791
- Report Number(s):
- SLAC-PUB--7868; CONF-980748--; ON: DE98059248; IN: ICHEP-PA08--180
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of the B{sup +} and B{sup 0} lifetimes using topological vertexing at SLD
Measurement of the B{sup +} and B{sup 0} lifetimes from semileptonic decays at SLD