@article{7df65e5356174d3eaa8b5e890da5e162,
title = "A measurement of the average bottom hadron lifetime",
abstract = "The average b hadron lifetime, τb, has been measured using approximately 3.5 million hadronic events collected with the OPAL detector at LEP between 1991 and 1994. A lifetime tag based on a neural network algorithm was used to select Z0 → b{\=b} events. A secondary vertex reconstructed on the opposite side from the b-tag was used to measure the b hadron decay length. This was combined with an estimate of the b hadron momentum, allowing the b hadron decay time to be evaluated. The lifetime, τb = 1.611 ± 0.010 (stat) ± 0.027 (syst) ps , was extracted from a fit involving the distribution of the 95620 decay times reconstructed in the data and the corresponding distribution in Monte Carlo.",
author = "{DELPHI Collaboration} and K. Ackerstaff and G. Alexander and J. Allison and N. Altekamp and K. Ametewee and Anderson, {K. J.} and S. Anderson and S. Arcelli and S. Asai and D. Axen and G. Azuelos and Ball, {A. H.} and E. Barberio and Barlow, {R. J.} and R. Bartoldus and Bailey, {J. R.} and J. Bechtluft and C. Beeston and T. Behnke and Bell, {A. N.} and Bell, {K. W.} and G. Bella and S. Bentvelsen and P. Berlich and S. Bethke and O. Biebel and V. Blobel and Bloodworth, {I. J.} and Bloomer, {J. E.} and M. Bobinski and P. Bock and Bosch, {H. M.} and M. Boutemeur and Bouwens, {B. T.} and S. Braibant and Brown, {R. M.} and Burckhart, {H. J.} and C. Burgard and R. B{\"u}rgin and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and D. Chrisman and Clarke, {P. E.L.} and I. Cohen and Conboy, {J. E.} and R. Folman",
note = "Funding Information: Acknowledgements. We particularly wish to thank the SL Division for the efficient operation of the LEP accelerator and for their continuing close cooperation with our experimental group. In addition to the support staff at our own institutions we are pleased to acknowledge the Department of Energy, USA, National Science Foundation, USA, Particle Physics and Astronomy Research Council, UK, Natural Sciences and Engineering Research Council, Canada, Israel Science Foundation, administered by the Israel Academy of Science and Humanities, Minerva Gesellschaft, Japanese Ministry of Education, Science and Culture (the Monbusho) and a grant under the Monbusho International Science Research Program, German Israeli Bi-national Science Foundation (GIF), Direction des Sciences de la Mati{\`e}re du Commissariat {\`a} l{\textquoteright}Energie Atomique, France, Bundesministerium f{\"u}r Bildung, Wissenschaft, Forschung und Technologie, Germany, National Research Council of Canada, Hungarian Foundation for Scientific Research, OTKA T-016660, and OTKA F-015089.",
year = "1997",
month = feb,
day = "1",
doi = "10.1007/s002880050329",
language = "English",
volume = "73",
pages = "397--408",
journal = "Zeitschrift fur Physik C-Particles and Fields",
issn = "0170-9739",
publisher = "Springer Nature",
number = "3",
}