Measurement of the B{sup +} and B{sup 0} lifetimes from semileptonic decays at SLD
The lifetimes of B{sup +} and B{sup 0} mesons have been measured using a sample of 150,000 hadronic Z{sup 0} decays collected by the SLD experiment at the SLC between 1993 and 1995. The analysis identifies the semileptonic decays of B mesons with high (p,p{sub t}) leptons and reconstructs the B meson decay length and charge by vertexing the lepton with a partially reconstructed D meson. This method results in a sample of 634 (584) charged (neutral) decays with high charge purity. A maximum likelihood fit finds: {tau}{sub B{sup +}} = 1.60{sub {minus}0.11}{sup +0.12}(stat) {+-} 0.06(syst) ps, {tau}{sub B{sup 0}} = 1.55{sub {minus}0.12}{sup +0.13}(stat) {+-} 0.09(syst) ps, and the ratio {tau}{sub B{sup +}}/{tau}{sub B{sup 0}} = 1.03{sub {minus}0.13}{sup +0.15}(stat) {+-} 0.08(syst).
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States); Science and Engineering Research Council, Swindon (United Kingdom); Istituto Nazionale di Fisica Nucleare, Rome (Italy); Japan-US Cooperative Research Project on High Energy Physics, Nagoya (Japan); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00515; FG02-91ER40676; FG03-92ER40701; FG03-91ER40618; FG03-92ER40689; FG03-93ER40788; FG02-91ER40672; FG02-91ER40677; AC03-76SF00098; FG02-92ER40715; AC02-76ER03069; FG06-85ER40224; AC02-76ER00881; FG02-92ER40704; FG05-91ER40627
- OSTI ID:
- 490164
- Report Number(s):
- SLAC-PUB-7226; CONF-960765-64; ON: DE97006486; CNN: Grant PHY-91-13428; Grant PHY-89-21320; Grant PHY-92-04239; Grant PHY-88-17930; Grant PHY-88-19316; Grant PHY-92-03212; TRN: 97:012519
- Resource Relation:
- Conference: 28. international conference on high-energy physics, Warsaw (Poland), 25-31 Jul 1996; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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