An improved measurement of Rb using a double tagging method

K. Ackerstaff; G. Alexander; J. Allison; N. Altekamp; K. Ametewee; K. J. Anderson; S. Anderson; S. Arcelli; S. Asai; D. Axen; G. Azuelos; A. H. Ball; E. Barberio; R. J. Barlow; R. Bartoldus; J. R. Batley; J. Bechtluft; C. Beeston; T. Behnke; A. N. Bell; K. W. Bell; G. Bella; S. Bentvelsen; P. Berlich; S. Bethke; O. Biebel; A. Biguzzi; V. Blobel; I. J. Bloodworth; J. E. Bloomer; M. Bobinski; P. Bock; H. M. Bosch; M. Boutemeur; B. T. Bouwens; S. Braibant; R. M. Brown; H. J. Burckhart; C. Burgard; R. Bürgin; P. Capiluppi; R. K. Carnegie; A. A. Carter; J. R. Carter; C. Y. Chang; D. G. Charlton; D. Chrisman; P. E.L. Clarke; I. Cohen; J. E. Conboy; O. C. Cooke; M. Cuffiani; S. Dado; C. Dallapiccola; G. M. Dallavalle; S. De Jong; L. A. Del Pozo; K. Desch; M. S. Dixit; E. Do Couto E Silva; M. Doucet; E. Duchovni; G. Duckeck; I. P. Duerdoth; J. E.G. Edwards; P. G. Estabrooks; H. G. Evans; M. Evans; F. Fabbri; P. Fath; F. Fiedler; M. Fierro; H. M. Fischer; R. Folman; D. G. Fong; M. Foucher; A. Fürtjes; P. Gagnon; A. Gaidot; J. W. Gary; J. Gascon; S. M. Gascon-Shotkin; N. I. Geddes; C. Geich-Gimbel; F. X. Gentit; T. Geralis; G. Giacomelli; P. Giacomelli; R. Giacomelli; V. Gibson; W. R. Gibson; D. M. Gingrich; D. Glenzinski; J. Goldberg; M. J. Goodrick; W. Gorn; C. Grandi; E. Gross; J. Grunhaus; M. Gruwé; C. Hajdu; G. G. Hanson; M. Hansroul; M. Hapke; C. K. Hargrove; P. A. Hart; C. Hartmann; M. Hauschild; C. M. Hawkes; R. Hawkings; R. J. Hemingway; M. Herndon; G. Herten; R. D. Heuer; M. D. Hildreth; J. C. Hill; S. J. Hillier; T. Hilse; P. R. Hobson; R. J. Homer; A. K. Honma; D. Horváth; R. Howard; R. E. Hughes-Jones; D. E. Hutchcroft; P. Igo-Kemenes; D. C. Imrie; M. R. Ingram; K. Ishii; A. Jawahery; P. W. Jeffreys; H. Jeremie; M. Jimack; A. Joly; C. R. Jones; G. Jones; M. Jones; R. W.L. Jones; U. Jost; P. Jovanovic; T. R. Junk; D. Karlen; K. Kawagoe; T. Kawamoto; R. K. Keeler; R. G. Kellogg; B. W. Kennedy; B. J. King; J. Kirk; S. Kluth; T. Kobayashi; M. Kobel; D. S. Koetke; T. P. Kokott; M. Kolrep; S. Komamiya; T. Kress; P. Krieger; J. Von Krogh; P. Kyberd; G. D. Lafferty; H. Lafoux; R. Lahmann; W. P. Lai; D. Lanske; J. Lauber; S. R. Lautenschlager; J. G. Layter; D. Lazic; A. M. Lee; E. Lefebvre; D. Lellouch; J. Letts; L. Levinson; C. Lewis; S. L. Lloyd; F. K. Loebinger; G. D. Long; M. J. Losty; J. Ludwig; A. Malik; M. Mannelli; S. Marcellini; C. Markus; A. J. Martin; J. P. Martin; G. Martinez; T. Mashimo; W. Matthews; P. Mättig; W. J. McDonald; J. McKenna; E. A. Mckigney; T. J. McMahon; A. I. McNab; R. A. McPherson; F. Meijers; S. Menke; F. S. Merritt; H. Mes; J. Meyer; A. Michelini; G. Mikenberg; D. J. Miller; R. Mir; W. Mohr; A. Montanari; T. Mori; M. Morii; U. Müller; K. Nagai; I. Nakamura; H. A. Neal; B. Nellen; B. Nijjhar; R. Nisius; S. W. O'Neale; F. G. Oakham; F. Odorici; H. O. Ogren; N. J. Oldershaw; T. Omori; M. J. Oreglia; S. Orito; J. Pálinkás; G. Pásztor; J. R. Pater; G. N. Patrick; J. Patt; M. J. Pearce; S. Petzold; P. Pfeifenschneider; J. E. Pilcher; J. Pinfold; D. E. Plane; P. Poffenberger; B. Poli; A. Posthaus; H. Przysiezniak; D. L. Rees; D. Rigby; S. Robertson; S. A. Robins; N. Rodning; J. M. Roney; A. Rooke; E. Ros; A. M. Rossi; M. Rosvick; P. Routenburg; Y. Rozen; K. Runge; O. Runolfsson; U. Ruppel; D. R. Rust; R. Rylko; K. Sachs; E. K.G. Sarkisyan; M. Sasaki; C. Sbarra; A. D. Schaile; O. Schaile; F. Scharf; P. Scharff-Hansen; P. Schenk; B. Schmitt; S. Schmitt; M. Schröder; H. C. Schultz-Coulon; M. Schulz; M. Schumacher; P. Schütz; W. G. Scott; T. G. Shears; B. C. Shen; C. H. Shepherd-Themistocleous; P. Sherwood; G. P. Siroli; A. Sittler; A. Skillman; A. Skuja; A. M. Smith; T. J. Smith; G. A. Snow; R. Sobie; S. Söldner-Rembold; R. W. Springer; M. Sproston; A. Stahl; M. Steiert; K. Stephens; J. Steuerer; B. Stockhausen; D. Strom; F. Strumia; P. Szymanski; R. Tafirout; S. D. Talbot; S. Tanaka; P. Taras; S. Tarem; M. Thiergen; M. A. Thomson; E. Von Törne; S. Towers; I. Trigger; T. Tsukamoto; E. Tsur; A. S. Turcot; M. F. Turner-Watson; P. Utzat; R. Van Kooten; G. Vasseur; M. Verzocchi; P. Vikas; M. Vincter; E. H. Vokurka; F. Wäckerle; A. Wagner; C. P. Ward; D. R. Ward; J. J. Ward; P. M. Watkins; A. T. Watson; N. K. Watson; P. S. Wells; N. Wermes; J. S. White; B. Wilkens; G. W. Wilson; J. A. Wilson; G. Wolf; S. Wotton; T. R. Wyatt; S. Yamashita; G. Yekutieli; V. Zacek

doi:10.1007/s002880050366

An improved measurement of R_b using a double tagging method

K. Ackerstaff, G. Alexander, J. Allison, N. Altekamp, K. Ametewee, K. J. Anderson, S. Anderson, S. Arcelli, S. Asai, D. Axen, G. Azuelos, A. H. Ball, E. Barberio, R. J. Barlow, R. Bartoldus, J. R. Batley, J. Bechtluft, C. Beeston, T. Behnke, A. N. BellK. W. Bell, G. Bella, S. Bentvelsen, P. Berlich, S. Bethke, O. Biebel, A. Biguzzi, V. Blobel, I. J. Bloodworth, J. E. Bloomer, M. Bobinski, P. Bock, H. M. Bosch, M. Boutemeur, B. T. Bouwens, S. Braibant, R. M. Brown, H. J. Burckhart, C. Burgard, R. Bürgin, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, D. Chrisman, P. E.L. Clarke, I. Cohen, J. E. Conboy, O. C. Cooke, M. Cuffiani, S. Dado, C. Dallapiccola, G. M. Dallavalle, S. De Jong, L. A. Del Pozo, K. Desch, M. S. Dixit, E. Do Couto E Silva, M. Doucet, E. Duchovni, G. Duckeck, I. P. Duerdoth, J. E.G. Edwards, P. G. Estabrooks, H. G. Evans, M. Evans, F. Fabbri, P. Fath, F. Fiedler, M. Fierro, H. M. Fischer, R. Folman, D. G. Fong, M. Foucher, A. Fürtjes, P. Gagnon, A. Gaidot, J. W. Gary, J. Gascon, S. M. Gascon-Shotkin, N. I. Geddes, C. Geich-Gimbel, F. X. Gentit, T. Geralis, G. Giacomelli, P. Giacomelli, R. Giacomelli, V. Gibson, W. R. Gibson, D. M. Gingrich, D. Glenzinski, J. Goldberg, M. J. Goodrick, W. Gorn, C. Grandi, E. Gross, J. Grunhaus, M. Gruwé, C. Hajdu, G. G. Hanson, M. Hansroul, M. Hapke, C. K. Hargrove, P. A. Hart, C. Hartmann, M. Hauschild, C. M. Hawkes, R. Hawkings, R. J. Hemingway, M. Herndon, G. Herten, R. D. Heuer, M. D. Hildreth, J. C. Hill, S. J. Hillier, T. Hilse, P. R. Hobson, R. J. Homer, A. K. Honma, D. Horváth, R. Howard, R. E. Hughes-Jones, D. E. Hutchcroft, P. Igo-Kemenes, D. C. Imrie, M. R. Ingram, K. Ishii, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, A. Joly, C. R. Jones, G. Jones, M. Jones, R. W.L. Jones, U. Jost, P. Jovanovic, T. R. Junk, D. Karlen, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, B. J. King, J. Kirk, S. Kluth, T. Kobayashi, M. Kobel, D. S. Koetke, T. P. Kokott, M. Kolrep, S. Komamiya, T. Kress, P. Krieger, J. Von Krogh, P. Kyberd, G. D. Lafferty, H. Lafoux, R. Lahmann, W. P. Lai, D. Lanske, J. Lauber, S. R. Lautenschlager, J. G. Layter, D. Lazic, A. M. Lee, E. Lefebvre, D. Lellouch, J. Letts, L. Levinson, C. Lewis, S. L. Lloyd, F. K. Loebinger, G. D. Long, M. J. Losty, J. Ludwig, A. Malik, M. Mannelli, S. Marcellini, C. Markus, A. J. Martin, J. P. Martin, G. Martinez, T. Mashimo, W. Matthews, P. Mättig, W. J. McDonald, J. McKenna, E. A. Mckigney, T. J. McMahon, A. I. McNab, R. A. McPherson, F. Meijers, S. Menke, F. S. Merritt, H. Mes, J. Meyer, A. Michelini, G. Mikenberg, D. J. Miller, R. Mir, W. Mohr, A. Montanari, T. Mori, M. Morii, U. Müller, K. Nagai, I. Nakamura, H. A. Neal, B. Nellen, B. Nijjhar, R. Nisius, S. W. O'Neale, F. G. Oakham, F. Odorici, H. O. Ogren, N. J. Oldershaw, T. Omori, M. J. Oreglia, S. Orito, J. Pálinkás, G. Pásztor, J. R. Pater, G. N. Patrick, J. Patt, M. J. Pearce, S. Petzold, P. Pfeifenschneider, J. E. Pilcher, J. Pinfold, D. E. Plane, P. Poffenberger, B. Poli, A. Posthaus, H. Przysiezniak, D. L. Rees, D. Rigby, S. Robertson, S. A. Robins, N. Rodning, J. M. Roney, A. Rooke, E. Ros, A. M. Rossi, M. Rosvick, P. Routenburg, Y. Rozen, K. Runge, O. Runolfsson, U. Ruppel, D. R. Rust, R. Rylko, K. Sachs, E. K.G. Sarkisyan, M. Sasaki, C. Sbarra, A. D. Schaile, O. Schaile, F. Scharf, P. Scharff-Hansen, P. Schenk, B. Schmitt, S. Schmitt, M. Schröder, H. C. Schultz-Coulon, M. Schulz, M. Schumacher, P. Schütz, W. G. Scott, T. G. Shears, B. C. Shen, C. H. Shepherd-Themistocleous, P. Sherwood, G. P. Siroli, A. Sittler, A. Skillman, A. Skuja, A. M. Smith, T. J. Smith, G. A. Snow, R. Sobie, S. Söldner-Rembold, R. W. Springer, M. Sproston, A. Stahl, M. Steiert, K. Stephens, J. Steuerer, B. Stockhausen, D. Strom, F. Strumia, P. Szymanski, R. Tafirout, S. D. Talbot, S. Tanaka, P. Taras, S. Tarem, M. Thiergen, M. A. Thomson, E. Von Törne, S. Towers, I. Trigger, T. Tsukamoto, E. Tsur, A. S. Turcot, M. F. Turner-Watson, P. Utzat, R. Van Kooten, G. Vasseur, M. Verzocchi, P. Vikas, M. Vincter, E. H. Vokurka, F. Wäckerle, A. Wagner, C. P. Ward, D. R. Ward, J. J. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. S. Wells, N. Wermes, J. S. White, B. Wilkens, G. W. Wilson, J. A. Wilson, G. Wolf, S. Wotton, T. R. Wyatt, S. Yamashita, G. Yekutieli, V. Zacek

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

This paper describes an update of the double tagging measurement of the fraction, R_b, of Z⁰ → bb̄ events in hadronic Z⁰ decays, with statistics improved by including the data collected in 1994. The presence of electrons or muons from semileptonic decays of bottom hadrons and the detection of bottom hadron decay vertices were used together to obtain an event sample enriched in Z⁰ → bb̄ decays. The efficiency of the bb̄ event tagging was obtained from the data by comparing the numbers of events having a bottom signature in either one or both thrust hemispheres. Efficiency correlations between opposite event hemispheres are small (< 0.5%) and well understood through comparisons between the real and simulated data samples. A value of R_b = 0.2175 ± 0.0014 ± 0.0017 was obtained, where the first error is statistical and the second systematic. The uncertainty on the decay width Γ(Z⁰ → cc̄) is not included in these errors. The result depends on R_c as follows: ΔR_b/R_b = -0.084 ΔR_c/R_c, where ΔR_c is the deviation of R_c from the value 0.172 predicted by the Standard Model.

Original language	English
Pages (from-to)	1-17
Number of pages	17
Journal	Zeitschrift fur Physik C-Particles and Fields
Volume	74
Issue number	1
DOIs	https://doi.org/10.1007/s002880050366
State	Published - Mar 1997
Externally published	Yes

Funding

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 Matière du Commissariat à l’Energie Atomique, France, Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie, Germany, National Research Council of Canada, Hungarian Foundation for Scientific Research, OTKA T-016660, and OTKA F-015089.

Funders	Funder number
Direction des Sciences de la Matière du Commissariat à l’Energie Atomique
German Israeli Bi-national Science Foundation
Hungarian Foundation for Scientific Research	OTKA F-015089, OTKA T-016660
Minerva Gesellschaft
National Science Foundation
U.S. Department of Energy
Natural Sciences and Engineering Research Council of Canada
National Research Council Canada
Ministry of Education, Culture, Sports, Science and Technology
Bundesministerium für Bildung und Forschung
Israel Academy of Sciences and Humanities
Israel Science Foundation

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10.1007/s002880050366

Cite this

Ackerstaff, K., Alexander, G., Allison, J., Altekamp, N., Ametewee, K., Anderson, K. J., Anderson, S., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Ball, A. H., Barberio, E., Barlow, R. J., Bartoldus, R., Batley, J. R., Bechtluft, J., Beeston, C., Behnke, T., ... Zacek, V. (1997). An improved measurement of R_b using a double tagging method. Zeitschrift fur Physik C-Particles and Fields, 74(1), 1-17. https://doi.org/10.1007/s002880050366

@article{ea23aee7c41b45cd9703fcb22a3e866e,

title = "An improved measurement of Rb using a double tagging method",

abstract = "This paper describes an update of the double tagging measurement of the fraction, Rb, of Z0 → b{\=b} events in hadronic Z0 decays, with statistics improved by including the data collected in 1994. The presence of electrons or muons from semileptonic decays of bottom hadrons and the detection of bottom hadron decay vertices were used together to obtain an event sample enriched in Z0 → b{\=b} decays. The efficiency of the b{\=b} event tagging was obtained from the data by comparing the numbers of events having a bottom signature in either one or both thrust hemispheres. Efficiency correlations between opposite event hemispheres are small (< 0.5%) and well understood through comparisons between the real and simulated data samples. A value of Rb = 0.2175 ± 0.0014 ± 0.0017 was obtained, where the first error is statistical and the second systematic. The uncertainty on the decay width Γ(Z0 → c{\=c}) is not included in these errors. The result depends on Rc as follows: ΔRb/Rb = -0.084 ΔRc/Rc, where ΔRc is the deviation of Rc from the value 0.172 predicted by the Standard Model.",

author = "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 Batley, {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 A. Biguzzi 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 Cooke, {O. C.} and M. Cuffiani and S. Dado and C. Dallapiccola and Dallavalle, {G. M.} and {De Jong}, S. and {Del Pozo}, {L. A.} and K. Desch and Dixit, {M. S.} and {Do Couto E Silva}, E. and M. Doucet and E. Duchovni and G. Duckeck and Duerdoth, {I. P.} and Edwards, {J. E.G.} and Estabrooks, {P. G.} and Evans, {H. G.} and M. Evans and F. Fabbri and P. Fath and F. Fiedler and M. Fierro and Fischer, {H. M.} and R. Folman and Fong, {D. G.} and M. Foucher and A. F{\"u}rtjes and P. Gagnon and A. Gaidot and Gary, {J. W.} and J. Gascon and Gascon-Shotkin, {S. M.} and Geddes, {N. I.} and C. Geich-Gimbel and Gentit, {F. X.} and T. Geralis and G. Giacomelli and P. Giacomelli and R. Giacomelli and V. Gibson and Gibson, {W. R.} and Gingrich, {D. M.} and D. Glenzinski and J. Goldberg and Goodrick, {M. J.} and W. Gorn and C. Grandi and E. Gross and J. Grunhaus and M. Gruw{\'e} and C. Hajdu and Hanson, {G. G.} and M. Hansroul and M. Hapke and Hargrove, {C. K.} and Hart, {P. A.} and C. Hartmann and M. Hauschild and Hawkes, {C. M.} and R. Hawkings and Hemingway, {R. J.} and M. Herndon and G. Herten and Heuer, {R. D.} and Hildreth, {M. D.} and Hill, {J. C.} and Hillier, {S. J.} and T. Hilse and Hobson, {P. R.} and Homer, {R. J.} and Honma, {A. K.} and D. Horv{\'a}th and R. Howard and Hughes-Jones, {R. E.} and Hutchcroft, {D. E.} and P. Igo-Kemenes and Imrie, {D. C.} and Ingram, {M. R.} and K. Ishii and A. Jawahery and Jeffreys, {P. W.} and H. Jeremie and M. Jimack and A. Joly and Jones, {C. R.} and G. Jones and M. Jones and Jones, {R. W.L.} and U. Jost and P. Jovanovic and Junk, {T. R.} and D. Karlen and K. Kawagoe and T. Kawamoto and Keeler, {R. K.} and Kellogg, {R. G.} and Kennedy, {B. W.} and King, {B. J.} and J. Kirk and S. Kluth and T. Kobayashi and M. Kobel and Koetke, {D. S.} and Kokott, {T. P.} and M. Kolrep and S. Komamiya and T. Kress and P. Krieger and {Von Krogh}, J. and P. Kyberd and Lafferty, {G. D.} and H. Lafoux and R. Lahmann and Lai, {W. P.} and D. Lanske and J. Lauber and Lautenschlager, {S. R.} and Layter, {J. G.} and D. Lazic and Lee, {A. M.} and E. Lefebvre and D. Lellouch and J. Letts and L. Levinson and C. Lewis and Lloyd, {S. L.} and Loebinger, {F. K.} and Long, {G. D.} and Losty, {M. J.} and J. Ludwig and A. Malik and M. Mannelli and S. Marcellini and C. Markus and Martin, {A. J.} and Martin, {J. P.} and G. Martinez and T. Mashimo and W. Matthews and P. M{\"a}ttig and McDonald, {W. J.} and J. McKenna and Mckigney, {E. A.} and McMahon, {T. J.} and McNab, {A. I.} and McPherson, {R. A.} and F. Meijers and S. Menke and Merritt, {F. S.} and H. Mes and J. Meyer and A. Michelini and G. Mikenberg and Miller, {D. J.} and R. Mir and W. Mohr and A. Montanari and T. Mori and M. Morii and U. M{\"u}ller and K. Nagai and I. Nakamura and Neal, {H. A.} and B. Nellen and B. Nijjhar and R. Nisius and O'Neale, {S. W.} and Oakham, {F. G.} and F. Odorici and Ogren, {H. O.} and Oldershaw, {N. J.} and T. Omori and Oreglia, {M. J.} and S. Orito and J. P{\'a}link{\'a}s and G. P{\'a}sztor and Pater, {J. R.} and Patrick, {G. N.} and J. Patt and Pearce, {M. J.} and S. Petzold and P. Pfeifenschneider and Pilcher, {J. E.} and J. Pinfold and Plane, {D. E.} and P. Poffenberger and B. Poli and A. Posthaus and H. Przysiezniak and Rees, {D. L.} and D. Rigby and S. Robertson and Robins, {S. A.} and N. Rodning and Roney, {J. M.} and A. Rooke and E. Ros and Rossi, {A. M.} and M. Rosvick and P. Routenburg and Y. Rozen and K. Runge and O. Runolfsson and U. Ruppel and Rust, {D. R.} and R. Rylko and K. Sachs and Sarkisyan, {E. K.G.} and M. Sasaki and C. Sbarra and Schaile, {A. D.} and O. Schaile and F. Scharf and P. Scharff-Hansen and P. Schenk and B. Schmitt and S. Schmitt and M. Schr{\"o}der and Schultz-Coulon, {H. C.} and M. Schulz and M. Schumacher and P. Sch{\"u}tz and Scott, {W. G.} and Shears, {T. G.} and Shen, {B. C.} and Shepherd-Themistocleous, {C. H.} and P. Sherwood and Siroli, {G. P.} and A. Sittler and A. Skillman and A. Skuja and Smith, {A. M.} and Smith, {T. J.} and Snow, {G. A.} and R. Sobie and S. S{\"o}ldner-Rembold and Springer, {R. W.} and M. Sproston and A. Stahl and M. Steiert and K. Stephens and J. Steuerer and B. Stockhausen and D. Strom and F. Strumia and P. Szymanski and R. Tafirout and Talbot, {S. D.} and S. Tanaka and P. Taras and S. Tarem and M. Thiergen and Thomson, {M. A.} and {Von T{\"o}rne}, E. and S. Towers and I. Trigger and T. Tsukamoto and E. Tsur and Turcot, {A. S.} and Turner-Watson, {M. F.} and P. Utzat and {Van Kooten}, R. and G. Vasseur and M. Verzocchi and P. Vikas and M. Vincter and Vokurka, {E. H.} and F. W{\"a}ckerle and A. Wagner and Ward, {C. P.} and Ward, {D. R.} and Ward, {J. J.} and Watkins, {P. M.} and Watson, {A. T.} and Watson, {N. K.} and Wells, {P. S.} and N. Wermes and White, {J. S.} and B. Wilkens and Wilson, {G. W.} and Wilson, {J. A.} and G. Wolf and S. Wotton and Wyatt, {T. R.} and S. Yamashita and G. Yekutieli and V. Zacek",

year = "1997",

month = mar,

doi = "10.1007/s002880050366",

language = "English",

volume = "74",

pages = "1--17",

journal = "Zeitschrift fur Physik C-Particles and Fields",

issn = "0170-9739",

number = "1",

}

Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Ametewee, K, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Barberio, E, Barlow, RJ, Bartoldus, R, Batley, JR, Bechtluft, J, Beeston, C, Behnke, T, Bell, AN, Bell, KW, Bella, G, Bentvelsen, S, Berlich, P, Bethke, S, Biebel, O, Biguzzi, A, Blobel, V, Bloodworth, IJ, Bloomer, JE, Bobinski, M, Bock, P, Bosch, HM, Boutemeur, M, Bouwens, BT, Braibant, S, Brown, RM, Burckhart, HJ, Burgard, C, Bürgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, JE, Cooke, OC, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, De Jong, S, Del Pozo, LA, Desch, K, Dixit, MS, Do Couto E Silva, E, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Fabbri, F, Fath, P, Fiedler, F, Fierro, M, Fischer, HM, Folman, R, Fong, DG, Foucher, M, Fürtjes, A, Gagnon, P, Gaidot, A, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Gentit, FX, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Goodrick, MJ, Gorn, W, Grandi, C, Gross, E, Grunhaus, J, Gruwé, M, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Hargrove, CK, Hart, PA, Hartmann, C, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Herndon, M, Herten, G, Heuer, RD, Hildreth, MD, Hill, JC, Hillier, SJ, Hilse, T, Hobson, PR, Homer, RJ, Honma, AK, Horváth, D, Howard, R, Hughes-Jones, RE, Hutchcroft, DE, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Jones, G, Jones, M, Jones, RWL, Jost, U, Jovanovic, P, Junk, TR, Karlen, D, Kawagoe, K, Kawamoto, T, Keeler, RK, Kellogg, RG, Kennedy, BW, King, BJ, Kirk, J, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Kolrep, M, Komamiya, S, Kress, T, Krieger, P, Von Krogh, J, Kyberd, P, Lafferty, GD, Lafoux, H, Lahmann, R, Lai, WP, Lanske, D, Lauber, J, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Lewis, C, Lloyd, SL, Loebinger, FK, Long, GD, Losty, MJ, Ludwig, J, Malik, A, Mannelli, M, Marcellini, S, Markus, C, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Matthews, W, Mättig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McNab, AI, McPherson, RA, Meijers, F, Menke, S, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mir, R, Mohr, W, Montanari, A, Mori, T, Morii, M, Müller, U, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Nijjhar, B, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oldershaw, NJ, Omori, T, Oreglia, MJ, Orito, S, Pálinkás, J, Pásztor, G, Pater, JR, Patrick, GN, Patt, J, Pearce, MJ, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Przysiezniak, H, Rees, DL, Rigby, D, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Rooke, A, Ros, E, Rossi, AM, Rosvick, M, Routenburg, P, Rozen, Y, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Sachs, K, Sarkisyan, EKG, Sasaki, M, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schmitt, B, Schmitt, S, Schröder, M, Schultz-Coulon, HC, Schulz, M, Schumacher, M, Schütz, P, Scott, WG, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Smith, TJ, Snow, GA, Sobie, R, Söldner-Rembold, S, Springer, RW, Sproston, M, Stahl, A, Steiert, M, Stephens, K, Steuerer, J, Stockhausen, B, Strom, D, Strumia, F, Szymanski, P, Tafirout, R, Talbot, SD, Tanaka, S, Taras, P, Tarem, S, Thiergen, M, Thomson, MA, Von Törne, E, Towers, S, Trigger, I, Tsukamoto, T, Tsur, E, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, Vasseur, G, Verzocchi, M, Vikas, P, Vincter, M, Vokurka, EH, Wäckerle, F, Wagner, A, Ward, CP, Ward, DR, Ward, JJ, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, White, JS, Wilkens, B, Wilson, GW, Wilson, JA, Wolf, G, Wotton, S, Wyatt, TR, Yamashita, S, Yekutieli, G & Zacek, V 1997, 'An improved measurement of R_b using a double tagging method', Zeitschrift fur Physik C-Particles and Fields, vol. 74, no. 1, pp. 1-17. https://doi.org/10.1007/s002880050366

TY - JOUR

T1 - An improved measurement of Rb using a double tagging method

AU - Ackerstaff, K.

AU - Alexander, G.

AU - Allison, J.

AU - Altekamp, N.

AU - Ametewee, K.

AU - Anderson, K. J.

AU - Anderson, S.

AU - Arcelli, S.

AU - Asai, S.

AU - Axen, D.

AU - Azuelos, G.

AU - Ball, A. H.

AU - Barberio, E.

AU - Barlow, R. J.

AU - Bartoldus, R.

AU - Batley, J. R.

AU - Bechtluft, J.

AU - Beeston, C.

AU - Behnke, T.

AU - Bell, A. N.

AU - Bell, K. W.

AU - Bella, G.

AU - Bentvelsen, S.

AU - Berlich, P.

AU - Bethke, S.

AU - Biebel, O.

AU - Biguzzi, A.

AU - Blobel, V.

AU - Bloodworth, I. J.

AU - Bloomer, J. E.

AU - Bobinski, M.

AU - Bock, P.

AU - Bosch, H. M.

AU - Boutemeur, M.

AU - Bouwens, B. T.

AU - Braibant, S.

AU - Brown, R. M.

AU - Burckhart, H. J.

AU - Burgard, C.

AU - Bürgin, R.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Chrisman, D.

AU - Clarke, P. E.L.

AU - Cohen, I.

AU - Conboy, J. E.

AU - Cooke, O. C.

AU - Cuffiani, M.

AU - Dado, S.

AU - Dallapiccola, C.

AU - Dallavalle, G. M.

AU - De Jong, S.

AU - Del Pozo, L. A.

AU - Desch, K.

AU - Dixit, M. S.

AU - Do Couto E Silva, E.

AU - Doucet, M.

AU - Duchovni, E.

AU - Duckeck, G.

AU - Duerdoth, I. P.

AU - Edwards, J. E.G.

AU - Estabrooks, P. G.

AU - Evans, H. G.

AU - Evans, M.

AU - Fabbri, F.

AU - Fath, P.

AU - Fiedler, F.

AU - Fierro, M.

AU - Fischer, H. M.

AU - Folman, R.

AU - Fong, D. G.

AU - Foucher, M.

AU - Fürtjes, A.

AU - Gagnon, P.

AU - Gaidot, A.

AU - Gary, J. W.

AU - Gascon, J.

AU - Gascon-Shotkin, S. M.

AU - Geddes, N. I.

AU - Geich-Gimbel, C.

AU - Gentit, F. X.

AU - Geralis, T.

AU - Giacomelli, G.

AU - Giacomelli, P.

AU - Giacomelli, R.

AU - Gibson, V.

AU - Gibson, W. R.

AU - Gingrich, D. M.

AU - Glenzinski, D.

AU - Goldberg, J.

AU - Goodrick, M. J.

AU - Gorn, W.

AU - Grandi, C.

AU - Gross, E.

AU - Grunhaus, J.

AU - Gruwé, M.

AU - Hajdu, C.

AU - Hanson, G. G.

AU - Hansroul, M.

AU - Hapke, M.

AU - Hargrove, C. K.

AU - Hart, P. A.

AU - Hartmann, C.

AU - Hauschild, M.

AU - Hawkes, C. M.

AU - Hawkings, R.

AU - Hemingway, R. J.

AU - Herndon, M.

AU - Herten, G.

AU - Heuer, R. D.

AU - Hildreth, M. D.

AU - Hill, J. C.

AU - Hillier, S. J.

AU - Hilse, T.

AU - Hobson, P. R.

AU - Homer, R. J.

AU - Honma, A. K.

AU - Horváth, D.

AU - Howard, R.

AU - Hughes-Jones, R. E.

AU - Hutchcroft, D. E.

AU - Igo-Kemenes, P.

AU - Imrie, D. C.

AU - Ingram, M. R.

AU - Ishii, K.

AU - Jawahery, A.

AU - Jeffreys, P. W.

AU - Jeremie, H.

AU - Jimack, M.

AU - Joly, A.

AU - Jones, C. R.

AU - Jones, G.

AU - Jones, M.

AU - Jones, R. W.L.

AU - Jost, U.

AU - Jovanovic, P.

AU - Junk, T. R.

AU - Karlen, D.

AU - Kawagoe, K.

AU - Kawamoto, T.

AU - Keeler, R. K.

AU - Kellogg, R. G.

AU - Kennedy, B. W.

AU - King, B. J.

AU - Kirk, J.

AU - Kluth, S.

AU - Kobayashi, T.

AU - Kobel, M.

AU - Koetke, D. S.

AU - Kokott, T. P.

AU - Kolrep, M.

AU - Komamiya, S.

AU - Kress, T.

AU - Krieger, P.

AU - Von Krogh, J.

AU - Kyberd, P.

AU - Lafferty, G. D.

AU - Lafoux, H.

AU - Lahmann, R.

AU - Lai, W. P.

AU - Lanske, D.

AU - Lauber, J.

AU - Lautenschlager, S. R.

AU - Layter, J. G.

AU - Lazic, D.

AU - Lee, A. M.

AU - Lefebvre, E.

AU - Lellouch, D.

AU - Letts, J.

AU - Levinson, L.

AU - Lewis, C.

AU - Lloyd, S. L.

AU - Loebinger, F. K.

AU - Long, G. D.

AU - Losty, M. J.

AU - Ludwig, J.

AU - Malik, A.

AU - Mannelli, M.

AU - Marcellini, S.

AU - Markus, C.

AU - Martin, A. J.

AU - Martin, J. P.

AU - Martinez, G.

AU - Mashimo, T.

AU - Matthews, W.

AU - Mättig, P.

AU - McDonald, W. J.

AU - McKenna, J.

AU - Mckigney, E. A.

AU - McMahon, T. J.

AU - McNab, A. I.

AU - McPherson, R. A.

AU - Meijers, F.

AU - Menke, S.

AU - Merritt, F. S.

AU - Mes, H.

AU - Meyer, J.

AU - Michelini, A.

AU - Mikenberg, G.

AU - Miller, D. J.

AU - Mir, R.

AU - Mohr, W.

AU - Montanari, A.

AU - Mori, T.

AU - Morii, M.

AU - Müller, U.

AU - Nagai, K.

AU - Nakamura, I.

AU - Neal, H. A.

AU - Nellen, B.

AU - Nijjhar, B.

AU - Nisius, R.

AU - O'Neale, S. W.

AU - Oakham, F. G.

AU - Odorici, F.

AU - Ogren, H. O.

AU - Oldershaw, N. J.

AU - Omori, T.

AU - Oreglia, M. J.

AU - Orito, S.

AU - Pálinkás, J.

AU - Pásztor, G.

AU - Pater, J. R.

AU - Patrick, G. N.

AU - Patt, J.

AU - Pearce, M. J.

AU - Petzold, S.

AU - Pfeifenschneider, P.

AU - Pilcher, J. E.

AU - Pinfold, J.

AU - Plane, D. E.

AU - Poffenberger, P.

AU - Poli, B.

AU - Posthaus, A.

AU - Przysiezniak, H.

AU - Rees, D. L.

AU - Rigby, D.

AU - Robertson, S.

AU - Robins, S. A.

AU - Rodning, N.

AU - Roney, J. M.

AU - Rooke, A.

AU - Ros, E.

AU - Rossi, A. M.

AU - Rosvick, M.

AU - Routenburg, P.

AU - Rozen, Y.

AU - Runge, K.

AU - Runolfsson, O.

AU - Ruppel, U.

AU - Rust, D. R.

AU - Rylko, R.

AU - Sachs, K.

AU - Sarkisyan, E. K.G.

AU - Sasaki, M.

AU - Sbarra, C.

AU - Schaile, A. D.

AU - Schaile, O.

AU - Scharf, F.

AU - Scharff-Hansen, P.

AU - Schenk, P.

AU - Schmitt, B.

AU - Schmitt, S.

AU - Schröder, M.

AU - Schultz-Coulon, H. C.

AU - Schulz, M.

AU - Schumacher, M.

AU - Schütz, P.

AU - Scott, W. G.

AU - Shears, T. G.

AU - Shen, B. C.

AU - Shepherd-Themistocleous, C. H.

AU - Sherwood, P.

AU - Siroli, G. P.

AU - Sittler, A.

AU - Skillman, A.

AU - Skuja, A.

AU - Smith, A. M.

AU - Smith, T. J.

AU - Snow, G. A.

AU - Sobie, R.

AU - Söldner-Rembold, S.

AU - Springer, R. W.

AU - Sproston, M.

AU - Stahl, A.

AU - Steiert, M.

AU - Stephens, K.

AU - Steuerer, J.

AU - Stockhausen, B.

AU - Strom, D.

AU - Strumia, F.

AU - Szymanski, P.

AU - Tafirout, R.

AU - Talbot, S. D.

AU - Tanaka, S.

AU - Taras, P.

AU - Tarem, S.

AU - Thiergen, M.

AU - Thomson, M. A.

AU - Von Törne, E.

AU - Towers, S.

AU - Trigger, I.

AU - Tsukamoto, T.

AU - Tsur, E.

AU - Turcot, A. S.

AU - Turner-Watson, M. F.

AU - Utzat, P.

AU - Van Kooten, R.

AU - Vasseur, G.

AU - Verzocchi, M.

AU - Vikas, P.

AU - Vincter, M.

AU - Vokurka, E. H.

AU - Wäckerle, F.

AU - Wagner, A.

AU - Ward, C. P.

AU - Ward, D. R.

AU - Ward, J. J.

AU - Watkins, P. M.

AU - Watson, A. T.

AU - Watson, N. K.

AU - Wells, P. S.

AU - Wermes, N.

AU - White, J. S.

AU - Wilkens, B.

AU - Wilson, G. W.

AU - Wilson, J. A.

AU - Wolf, G.

AU - Wotton, S.

AU - Wyatt, T. R.

AU - Yamashita, S.

AU - Yekutieli, G.

AU - Zacek, V.

PY - 1997/3

Y1 - 1997/3

N2 - This paper describes an update of the double tagging measurement of the fraction, Rb, of Z0 → bb̄ events in hadronic Z0 decays, with statistics improved by including the data collected in 1994. The presence of electrons or muons from semileptonic decays of bottom hadrons and the detection of bottom hadron decay vertices were used together to obtain an event sample enriched in Z0 → bb̄ decays. The efficiency of the bb̄ event tagging was obtained from the data by comparing the numbers of events having a bottom signature in either one or both thrust hemispheres. Efficiency correlations between opposite event hemispheres are small (< 0.5%) and well understood through comparisons between the real and simulated data samples. A value of Rb = 0.2175 ± 0.0014 ± 0.0017 was obtained, where the first error is statistical and the second systematic. The uncertainty on the decay width Γ(Z0 → cc̄) is not included in these errors. The result depends on Rc as follows: ΔRb/Rb = -0.084 ΔRc/Rc, where ΔRc is the deviation of Rc from the value 0.172 predicted by the Standard Model.

AB - This paper describes an update of the double tagging measurement of the fraction, Rb, of Z0 → bb̄ events in hadronic Z0 decays, with statistics improved by including the data collected in 1994. The presence of electrons or muons from semileptonic decays of bottom hadrons and the detection of bottom hadron decay vertices were used together to obtain an event sample enriched in Z0 → bb̄ decays. The efficiency of the bb̄ event tagging was obtained from the data by comparing the numbers of events having a bottom signature in either one or both thrust hemispheres. Efficiency correlations between opposite event hemispheres are small (< 0.5%) and well understood through comparisons between the real and simulated data samples. A value of Rb = 0.2175 ± 0.0014 ± 0.0017 was obtained, where the first error is statistical and the second systematic. The uncertainty on the decay width Γ(Z0 → cc̄) is not included in these errors. The result depends on Rc as follows: ΔRb/Rb = -0.084 ΔRc/Rc, where ΔRc is the deviation of Rc from the value 0.172 predicted by the Standard Model.

UR - http://www.scopus.com/inward/record.url?scp=0002440310&partnerID=8YFLogxK

U2 - 10.1007/s002880050366

DO - 10.1007/s002880050366

M3 - Article

AN - SCOPUS:0002440310

SN - 0170-9739

VL - 74

SP - 1

EP - 17

JO - Zeitschrift fur Physik C-Particles and Fields

JF - Zeitschrift fur Physik C-Particles and Fields

IS - 1

ER -

An improved measurement of R_b using a double tagging method

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