Measurement of the B{sup +} and B{sup 0} Lifetimes using Topological Vertexing at SLD

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The lifetimes of B{sup +} and B{sup 0} mesons have been measured using the entire sample of 550,000 hadronic Z{sup 0} decays collected by the SLD experiment at the SLC between 1993 and 1998. In this paper, we describe the inclusive analysis of the 350,000 hadronic Z{sup 0} decays collected in 1997-98 with the upgraded SLD vertex detector. In this data period, a high statistics sample of 30903 (20731) charged (neutral) vertices with good charge purity is obtained. The charge purity is enhanced by using the vertex mass, the SLC electron beam polarization (73% for 1997-8) and an opposite hemisphere ... continued below

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19 pages

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Baird, Kenneth July 27, 1999.

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Description

The lifetimes of B{sup +} and B{sup 0} mesons have been measured using the entire sample of 550,000 hadronic Z{sup 0} decays collected by the SLD experiment at the SLC between 1993 and 1998. In this paper, we describe the inclusive analysis of the 350,000 hadronic Z{sup 0} decays collected in 1997-98 with the upgraded SLD vertex detector. In this data period, a high statistics sample of 30903 (20731) charged (neutral) vertices with good charge purity is obtained. The charge purity is enhanced by using the vertex mass, the SLC electron beam polarization (73% for 1997-8) and an opposite hemisphere jet charge technique. Combining the results of this data sample with the results from the earlier data yield the following preliminary values: {tau}{sub B{sup +}} = 1.623 {+-} 0.020(stat) {+-} 0.034(syst) ps, {tau}{sub B{sup +}} = 1.565 {+-} 0.021(stat) {+-} 0.043(syst) ps, {tau}{sub B{sup +}} = {tau}{sub B{sup 0}} = 1.037 {+-} {sub 0.024}{sup 0.025}(stat) {+-} 0.024(syst).

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19 pages

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  • Other Information: Contributed to the International Europhysics Conference on High Energy Physics, Tampere (FI), 07/15/1999--07/21/1999 and also to the XIXth International Symposium on Lepton Photon Interactions, Stanford, CA (US), 08/09/1999--08/14/1999

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  • Report No.: SLAC-PUB-8206
  • Grant Number: AC03-76SF00515
  • DOI: 10.2172/10121 | External Link
  • Office of Scientific & Technical Information Report Number: 10121
  • Archival Resource Key: ark:/67531/metadc628446

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  • July 27, 1999

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 5, 2016, 7:03 p.m.

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Baird, Kenneth. Measurement of the B{sup +} and B{sup 0} Lifetimes using Topological Vertexing at SLD, report, July 27, 1999; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc628446/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.