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Determination of the b quark mass at the Z mass scale

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Journal , Other literature type 01 Jul 2001Embargo end date: 01 Jan 2001 Germany, United Kingdom, Italy, Germany, Germany, Germany Publisher:Springer Science and Business Media LLCJournal:The European Physical Journal C, volume 21, pages 411-422 (issn: 1434-6044, eissn: 1434-6052,

Authors: Stephen Lloyd; A. Macchiolo; R. J. Hemingway; Klaus Desch; C. Y. Chang; F. Meijers; P. Ferrari; +193 Authors

Stephen Lloyd; A. Macchiolo; R. J. Hemingway; Klaus Desch; C. Y. Chang; F. Meijers; P. Ferrari; D. Axen; A. A. Carter; J. P. Martin; C. Ainsley; A. Gupta; I. R. Bailey; C. R. Jones; P. E.L. Clarke; M. J. Oreglia; A. T. Watson; H. Voss; H. A. Neal; Guenter Duckeck; C. P. Ward; A. De Roeck; M. S. Dixit; M. S. Dixit; P. F. Åkesson; E. Torrence; Siegfried Bethke; R. G. Kellogg; T. R. Junk; Dong Hee Kim; Dezso Horvath; B. Poli; Isabel Marian Trigger; P. Jovanovic; R. J. Homer; Gabriella Pasztor; Gabriella Pasztor; P. Scharff-Hansen; B. Dienes; B. Caron; W. J. McDonald; Peter Sherwood; Oana Elena Vickey Boeriu; J. W. Gary; N. L. Rodning; Peter Krieger; T. Behnke; Vakhtang Kartvelishvili; F. K. Loebinger; James Pinfold; Giora Mikenberg; W. Menges; B. Vachon; R. J. Sobie; Marek Tasevsky; K. J. Anderson; A. Fürtjes; D. Toya; D. Toya; Frank Fiedler; A. Leins; Klaus Rabbertz; Oliver Pooth; O. Schaile; H. Rick; D. J. Miller; D. Wetterling; B. Surrow; P. Gagnon; M. Harin-Dirac; N. K. Watson; K. R. Hossain; Dave Charlton; Dave Charlton; Christoph Geich-Gimbel; F. Spano; Naoko Kanaya; Naoko Kanaya; J. Böhme; J. Ludwig; P. S. Wells; J. Grunhaus; S. Rosati; Richard Nisius; T. P. Kokott; M. Kobel; Giovanni Abbiendi; Matthias Schröder; Norbert Wermes; G. N. Patrick; K. Stephens; Gideon Alexander; C. M. Hawkes; S. W. O'Neale; M. Gruwé; K. Ishii; K. Ishii; D. Lanske; Shoji Asai; Shoji Asai; Edward K. G. Sarkisyan; Edward K. G. Sarkisyan; Kiyotomo Kawagoe; Kiyotomo Kawagoe; Ivor Fleck; Joost Vossebeld; Richard Keeler; Gregor Herten; R. D. Heuer; H. Jeremie; F. S. Merritt; K. Runge; C. Littlewood; S. Arcelli; I. Cohen; Terry Richard Wyatt; H. J. Burckhart; R. K. Carnegie; Thorsten Wengler; J. M. Roney; C. Sbarra; J. von Krogh; J. Dubbert; A. D. Schaile; Tetsuro Mashimo; Tetsuro Mashimo; A. Klier; J. A. Wilson; B. C. Shen; G. G. Hanson; R. Liebisch; J. C. Hill; S. Spagnolo; Paolo Giacomelli; Arnulf Quadt; D. Karlen; R. Howard; Juergen Thomas; R. M. Brown; E. K. U. Gross; P. Igo-Kemenes; G. W. Wilson; P. Bock; J. Goldberg; R. Seuster; P. O. Günther; S.J. Dallison; Alain Bellerive; Tara Shears; Tara Shears; Andris Skuja; C. F. Vollmer; M. Kupper; P. Hüntemeyer; M. Ford; Zoltan Laszlo Trocsanyi; Ehud Duchovni; M. Hauschild; S. Braibant; M. A. Thomson; F. Odorici; D. I. Futyan; Austin Ball; D. M. Strom; Richard Teuscher; Ikuo Ueda; Ikuo Ueda; E. Clay; Alexander Oh; M. Donkers; K. W. Bell; Lutz Feld; A. Okpara; P. Mendez-Lorenzo; Balazs Ujvari; L. Brigliadori; T. Saeki; T. Saeki; Junichi Kanzaki; Junichi Kanzaki; Raimund Ströhmer; J. Lillich; Marco Cuffiani; H. Mes; H. Mes; John Allison; Thomas E Marchant; T. Kobayashi; T. Kobayashi; J. Lu; I. Lawson; Shlomit Tarem; T. J. McMahon; R. Kowalewski; K. Roscoe; O. Sahr; J. Polok; K. Sachs; M. Boutemeur; German Martinez;

doi: 10.1007/s100520100746 , 10.48550/arxiv.hep-ex/0105046

arXiv: hep-ex/0105046 , http://arxiv.org/abs/hep-ex/0105046

handle: 11587/332027

Determination of the b quark mass at the Z mass scale

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Abstract

In hadronic decays of Z bosons recorded with the OPAL detector at LEP, events containing b quarks were selected using the long lifetime of b flavoured hadrons. Comparing the 3-jet rate in b events with that in d,u,s and c quark events, a significant difference was observed. Using Order(alpha_s squared) calculations for massive quarks, this difference was used to determine the b quark mass in the MSbar renormalisation scheme at the scale of the Z boson mass. By combining the results from seven different jet finders the running b quark mass was determined to be mb(MZ) = (2.67 +/- 0.03(stat) +0.29/-0.37(syst) +/- 0.19(theo.)) GeV. Evolving this value to the b quark mass scale itself yields mb(mb) = (3.95 +0.52/-0.62) GeV, consistent with results obtained at the b quark production threshold. This determination confirms the QCD expectation of a scale dependent quark mass. A constant mass is ruled out by 3.9 standard deviations.

26 pages, 7 figures, Submitted to Eur.Phys.J.C

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Germany, United Kingdom, Italy, Germany, Germany, Germany

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University of Tokyo
Japan
University of Salford
United Kingdom
Alma Mater Studiorum University of Bologna
Italy
University of Freiburg
Germany
University College London
United Kingdom

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Keywords

FOS: Physical sciences, electron positron: annihilation, yield: (3jet), energy dependence, High Energy Physics - Experiment, dependence: flavor, High Energy Physics - Experiment (hep-ex), info:eu-repo/classification/ddc/530, Z0: hadronic decay, jet: particle identification, tables, OPAL, bibliography, CERN LEP Stor, electron positron: colliding beams, approx. 91 GeV-cms, quark: pair production, mass: bottom, Particle Physics - Experiment, Z0: electroproduction, experimental results

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NSERC| unidentified, UKRI| SCORE: Supply Chain Optimisation for demand Response Efficiency

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Energy Research