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A Precision measurement of the average lifetime of B hadrons

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Abreu, P. [--] Cortina Gil, Eduardo [UCL] DELPHI Collaboration [--]

The average lifetime ofB hadrons was measured using data collected with the DELPHI detector at the LEP collider during 1991 and 1992. The measurement was performed using two different anayses. The first method was an improvement on a previous technique, which used charged particle impact parameter distributions. This analysis measured an average lifetime forB hadrons of (1) τB=1.542±0.021(stat.)±0.045(syst.)ps. The second method was based on a new technique, which used inclusively reconstructed secondary vertices to measure (2) τB=1.599±0.014(stat.)±0.035(syst.)ps. Taking into account both the statistical and systematic corelations, the results of these two methods were combined to give an average lifetime forB hadrons of (3) τB=1.582±0.012(stat.)±0.032(syst.)ps.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès libre
Publication date 1994
Language Anglais
Journal information "Zeitschrift für Physik. C, Particles and fields" - Vol. 63, no.1, p. 3-15 (1994)
Publisher Springer (Berlin)
issn 0170-9739
e-issn 1431-5858
Publication status Publié
Affiliation UCL - SST/IRMP - Institut de recherche en mathématique et physique
Links
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Bibliographic reference Abreu, P. ; Cortina Gil, Eduardo ; DELPHI Collaboration ; et. al. A Precision measurement of the average lifetime of B hadrons . In: Zeitschrift für Physik. C, Particles and fields, Vol. 63, no.1, p. 3-15 (1994)
Permanent URL http://hdl.handle.net/2078.1/127192