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Journal ArticleDOI

Measurement of the average b hadron lifetime in Z 0 decays

P. D. Acton, +329 more
- 01 Jun 1993 - 
- Vol. 60, Iss: 2, pp 217-228
TLDR
In this article, a sample of 2610 electron candidates and 2762 muon candidates identified in hadronicZ0 decays has been used to measure the averageb hadron lifetime.
Abstract
A sample of 2610 electron candidates and 2762 muon candidates identified in hadronicZ0 decays has been used to measure the averageb hadron lifetime. These data were recorded with the OPAL detector during 1990 and 1991. Maximum likelihood fits to the distributions of the lepton impact parameters yield an averageb hadron lifetime of $$\tau _b = 1523 \pm 34 \pm 38fs$$ , where the first error is statistical and the second systematic. This result is a weighted average over the semileptonic branching fractions and production rates of theb hadrons produced inZ0 decays.

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Citations
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Journal ArticleDOI

Averages of B-Hadron, C-Hadron, and tau-lepton properties as of early 2012

TL;DR: In this article, the authors report world averages of measurements of b-hadron, c-, c-, and tau-lepton properties obtained by the Heavy Flavor Averaging Group (HFAG) using results available through the end of 2011.
Journal ArticleDOI

Averages of b-hadron, c-hadron, and $$\tau $$-lepton properties as of 2018: Heavy Flavor Averaging Group (HFLAV)

TL;DR: In this paper, the authors report world averages of measurements of b -hadron, c-hadron and -lepton properties obtained by the Heavy Flavour Averaging Group using results available through September 2018.
Journal ArticleDOI

Measurement of the BS0 lifetime

P. D. Acton, +316 more
- 19 Aug 1993 - 
TL;DR: In this article, the authors measured the lifetime of the Bs0 in a data sample of 8890000 hadronic events recorded with the ALEPH detector at LEP, and attributed these events to the semileptonic decay of the bs0 to a Ds− and an opposite-sign lepton.
Journal ArticleDOI

Vertex Displacements for Acausal Particles: Testing the Lee-Wick Standard Model at the LHC

TL;DR: In this article, the leptonic sector of the Lee-Wick Standard Model is analyzed in detail, and the authors propose to search for wrong displaced vertices, where decay products of the secondary vertex move towards the primary vertex instead of away from it, as a signature for microscopic violation of causality.
References
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Journal ArticleDOI

Scaling violations in inclusive e + e - annihilation spectra

TL;DR: In this paper, the origin of the observed scaling violations in the hadron spectra is investigated, and a simple parametrization for the heavy-quark fragmentation function is given which describes well recently measured charmed-meson spectra.
Journal ArticleDOI

Semileptonic B and D Decays in the Quark Model

TL;DR: It is argued that in the high-energy electron end-point region in B decay the usual inclusive ("quark decay") calculations are unjustified and must be replaced by explicit sums over decays of the original meson into low-mass exclusive hadronic final states.
Journal ArticleDOI

Leptonic decay of heavy flavors: A theoretical update

TL;DR: In this article, the spectrum of charged leptons in semileptonic B and D decays is reanalyzed and the effects of soft gluons are studied and their contribution is resummed in leading double logarithmic approximation.
Journal ArticleDOI

The OPAL detector at LEP

K Ahmet, +394 more
- 14 Aug 1990 - 
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The detector simulation program for the OPAL experiment at LEP

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A precise measurement of ΓZ→bb/ΓZ→hadrons

D. Buskulic, +399 more
- 02 Sep 1993 - 

The OPAL detector at LEP

K Ahmet, +394 more
- 14 Aug 1990 -