Measurement of heavy quark forward-backward asymmetries and average B mixing using leptons in multihadronic events

G. Alexander, John Allison, N. Altekamp, K. Ametewee, K. J. Anderson, S. Anderson, S. Arcelli, S. Asai, D. Axen, G. Azuelos, A. H. Ball, E. Barberio, Roger J. Barlow, R. Bartoldus, J. R. Batley, G. Beaudoin, J. Bechtluft, G. A. Beck, C. Beeston, T. BehnkeA. N. Bell, Kenneth Watson Bell, G. Bella, S. Bentvelsen, P. Berlich, S. Bethke, O. Biebel, I. J. Bloodworth, J. E. Bloomer, P. Bock, H. M. Bosch, M. Boutemeur, B. T. Bouwens, S. Braibant, P. Bright-Thomas, Robert M. Brown, H. J. Burckhart, C. Burgard, R. Burgin, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, C. Charlesworth, David G. Charlton, D. Chrisman, S. L. Chu, P. E.L. Clarke, S. G. Clowes, I. Cohen, J. E. Conboy, O. C. Cooke, M. Cuffiani, S. Dado, C. Dallapiccola, G. Marco Dallavalle, C. Darling, S. De Jong, L. A. del Pozo, M. S. Dixit, E. do Couto e Silva, E. Duchovni, G. Duckeck, I. P. Duerdoth, U. C. Dunwoody, J. E.G. Edwards, P. G. Estabrooks, H. G. Evans, F. Fabbri, B. Fabbro, P. Fath, F. Fiedler, M. Fierro, M. Fincke-Keeler, H. M. Fischer, R. Folman, D. G. Fong, M. Foucher, H. Fukui, A. Furtjes, P. Gagnon, A. Gaidot, J. W. Gary, J. Gascon, S. M. Gascon-Shotkin, N. I. Geddes, C. Geich-Gimbel, S. W. Gensler, F. X. Gentit, T. Geralis, G. Giacomelli, P. Giacomelli, R. Giacomelli, V. Gibson, W. R. Gibson, D. M. Gingrich, J. Goldberg, M. J. Goodrick, W. Gorn, C. Grandi, E. Gross, 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, G. Herten, R. D. Heuer, M. D. Hildreth, J. C. Hill, S. J. Hillier, T. Hilse, P. R. Hobson, D. Hochman, R. J. Homer, A. K. Honma, D. Horvath, R. Howard, R. E. Hughes-Jones, D. E. Hutchcroft, P. Igo-Kemenes, D. C. Imrie, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, A. Joly, M. Jones, R. W.L. Jones, U. Jost, P. Jovanovic, D. Karlen, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, B. J. King, J. King, J. Kirk, S. Kluth, T. Kobayashi, M. Kobel, D. S. Koetke, T. P. Kokott, Sachio Komamiya, Robert V. Kowalewski, T. Kress, P. Krieger, J. von Krogh, P. Kyberd, G. D. Lafferty, H. Lafoux, R. Lahmann, W. P. Lai, D. Lanske, J. Lauber, J. G. Layter, A. M. Lee, E. Lefebvre, D. Lellouch, J. Letts, L. Levinson, C. Lewis, S. L. Lloyd, F. K. Loebinger, G. D. Long, B. Lorazo, M. J. Losty, J. Ludwig, A. Luig, A. Malik, M. Mannelli, S. Marcellini, C. Markus, A. J. Martin, J. P. Martin, G. Martinez, T. Mashimo, W. Matthews, Peter Mattig, W. John McDonald, J. McKenna, E. A. Mckigney, T. J. McMahon, A. I. McNab, 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. Muller, B. Nellen, B. Nijjhar, R. Nisius, S. W. O'Neale, F. G. Oakham, F. Odorici, H. O. Ogren, N. J. Oldershaw, T. Omori, C. J. Oram, M. J. Oreglia, S. Orito, M. Palazzo, J. Palinkas, F. M. Palmonari, J. P. Pansart, G. Pasztor, J. R. Pater, G. N. Patrick, M. J. Pearce, P. D. Phillips, J. E. Pilcher, J. Pinfold, David E. Plane, P. Poffenberger, B. Poli, A. Posthaus, T. W. Pritchard, H. Przysiezniak, D. L. Rees, D. Rigby, M. G. Rison, S. A. Robins, N. Rodning, J. M. Roney, E. Ros, A. M. Rossi, M. Rosvick, P. Routenburg, Y. Rozen, K. Runge, O. Runolfsson, D. R. Rust, R. Rylko, E. K.G. Sarkisian, M. Sasaki, C. Sbarra, A. D. Schaile, O. Schaile, F. Scharf, P. Scharff-Hansen, P. Schenk, B. Schmitt, Matthias Schroder, H. C. Schultz-Coulon, M. Schulz, P. Schutz, J. Schwiening, 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. Soldner-Rembold, Robert Wayne Springer, M. Sproston, A. Stahl, M. Starks, C. Stegmann, K. Stephens, J. Steuerer, B. Stockhausen, David M. Strom, F. Strumia, P. Szymanski, R. Tafirout, H. Takeda, P. Taras, S. Tarem, M. Tecchio, N. Tesch, M. A. Thomson, E. von Torne, S. Towers, M. Tscheulin, T. Tsukamoto, E. Tsur, A. S. Turcot, M. F. Turner-Watson, P. Utzat, Rick J. Van Kooten, G. Vasseur, P. Vikas, M. Vincter, E. H. Vokurka, F. Wackerle, A. Wagner, D. L. Wagner, C. P. Ward, D. R. Ward, J. J. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. Weber, P. S. Wells, N. Wermes, B. Wilkens, G. W. Wilson, J. A. Wilson, T. Wlodek, G. Wolf, S. Wotton, T. R. Wyatt, S. Xella, S. Yamashita, G. Yekutieli, V. Zacek

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

A measurement of the forward-backward asymmetries of e + e - →Z 0 →bb and e + e - ->Z°→cc̄ using electrons and muons produced in semileptonic decays of bottom and charm hadrons is presented. Two new variables designed to optimize flavour separation are used in a maximum likelihood fit to a sample of events containing one or two identified leptons, allowing the simultaneous extraction of the b and c quark forward-backward asymmetries as well as the average B°-B° mixing. Using all data collected by OPAL up to the end of 1994, the asymmetries are measured to be: A FB b = ( 5.5±2.4 ±0.3 )% A FB b = (-7.5±3.4 ±0.6 )% at (√s) = 89.52 GeV, A FB b = (9.06±0.51±0.23)% A FB b = ( 6.00±0.67±0.52)7c at (√s) = 91.24 GeV, A FB b =(11.7±2.0 ±0.3 )% A FB b =( 14.l±2.8 ±0.9 )% at (√s) = 92.94 GeV. For the average B°-B° mixing a value of: X = 0.1107 ±0.0062 ±0.0055, is obtained, where in each case the first error is statistical and the second systematic.

Original languageEnglish
Pages (from-to)357-369
Number of pages13
JournalZeitschrift fur Physik C-Particles and Fields
Volume70
Issue number3
DOIs
Publication statusPublished - 1996 Jan 1
Externally publishedYes

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leptons
Hadrons
asymmetry
quarks
Flavors
Maximum likelihood
hadrons
Electrons
muons
decay
electrons

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Measurement of heavy quark forward-backward asymmetries and average B mixing using leptons in multihadronic events. / Alexander, G.; Allison, John; Altekamp, N.; Ametewee, K.; Anderson, K. J.; Anderson, S.; Arcelli, S.; Asai, S.; Axen, D.; Azuelos, G.; Ball, A. H.; Barberio, E.; Barlow, Roger J.; Bartoldus, R.; Batley, J. R.; Beaudoin, G.; Bechtluft, J.; Beck, G. A.; Beeston, C.; Behnke, T.; Bell, A. N.; Bell, Kenneth Watson; Bella, G.; Bentvelsen, S.; Berlich, P.; Bethke, S.; Biebel, O.; Bloodworth, I. J.; Bloomer, J. E.; Bock, P.; Bosch, H. M.; Boutemeur, M.; Bouwens, B. T.; Braibant, S.; Bright-Thomas, P.; Brown, Robert M.; Burckhart, H. J.; Burgard, C.; Burgin, R.; Capiluppi, P.; Carnegie, R. K.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlesworth, C.; Charlton, David G.; Chrisman, D.; Chu, S. L.; Clarke, P. E.L.; Clowes, S. G.; Cohen, I.; Conboy, J. E.; Cooke, O. C.; Cuffiani, M.; Dado, S.; Dallapiccola, C.; Dallavalle, G. Marco; Darling, C.; De Jong, S.; del Pozo, L. A.; Dixit, M. S.; do Couto e Silva, E.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Dunwoody, U. C.; Edwards, J. E.G.; Estabrooks, P. G.; Evans, H. G.; Fabbri, F.; Fabbro, B.; Fath, P.; Fiedler, F.; Fierro, M.; Fincke-Keeler, M.; Fischer, H. M.; Folman, R.; Fong, D. G.; Foucher, M.; Fukui, H.; Furtjes, A.; Gagnon, P.; Gaidot, A.; Gary, J. W.; Gascon, J.; Gascon-Shotkin, S. M.; Geddes, N. I.; Geich-Gimbel, C.; Gensler, S. W.; Gentit, F. X.; Geralis, T.; Giacomelli, G.; Giacomelli, P.; Giacomelli, R.; Gibson, V.; Gibson, W. R.; Gingrich, D. M.; Goldberg, J.; Goodrick, M. J.; Gorn, W.; Grandi, C.; Gross, E.; Hajdu, C.; Hanson, G. G.; Hansroul, M.; Hapke, M.; Hargrove, C. K.; Hart, P. A.; Hartmann, C.; Hauschild, M.; Hawkes, C. M.; Hawkings, R.; Hemingway, R. J.; Herten, G.; Heuer, R. D.; Hildreth, M. D.; Hill, J. C.; Hillier, S. J.; Hilse, T.; Hobson, P. R.; Hochman, D.; Homer, R. J.; Honma, A. K.; Horvath, D.; Howard, R.; Hughes-Jones, R. E.; Hutchcroft, D. E.; Igo-Kemenes, P.; Imrie, D. C.; Jawahery, A.; Jeffreys, P. W.; Jeremie, H.; Jimack, M.; Joly, A.; Jones, M.; Jones, R. W.L.; Jost, U.; Jovanovic, P.; Karlen, D.; Kawamoto, T.; Keeler, R. K.; Kellogg, R. G.; Kennedy, B. W.; King, B. J.; King, J.; Kirk, J.; Kluth, S.; Kobayashi, T.; Kobel, M.; Koetke, D. S.; Kokott, T. P.; Komamiya, Sachio; Kowalewski, Robert V.; Kress, T.; Krieger, P.; von Krogh, J.; Kyberd, P.; Lafferty, G. D.; Lafoux, H.; Lahmann, R.; Lai, W. P.; Lanske, D.; Lauber, J.; Layter, J. G.; Lee, A. M.; Lefebvre, E.; Lellouch, D.; Letts, J.; Levinson, L.; Lewis, C.; Lloyd, S. L.; Loebinger, F. K.; Long, G. D.; Lorazo, B.; Losty, M. J.; Ludwig, J.; Luig, A.; Malik, A.; Mannelli, M.; Marcellini, S.; Markus, C.; Martin, A. J.; Martin, J. P.; Martinez, G.; Mashimo, T.; Matthews, W.; Mattig, Peter; McDonald, W. John; McKenna, J.; Mckigney, E. A.; McMahon, T. J.; McNab, A. I.; Meijers, F.; Menke, S.; Merritt, F. S.; Mes, H.; Meyer, J.; Michelini, A.; Mikenberg, G.; Miller, D. J.; Mir, R.; Mohr, W.; Montanari, A.; Mori, T.; Morii, M.; Muller, U.; Nellen, B.; Nijjhar, B.; Nisius, R.; O'Neale, S. W.; Oakham, F. G.; Odorici, F.; Ogren, H. O.; Oldershaw, N. J.; Omori, T.; Oram, C. J.; Oreglia, M. J.; Orito, S.; Palazzo, M.; Palinkas, J.; Palmonari, F. M.; Pansart, J. P.; Pasztor, G.; Pater, J. R.; Patrick, G. N.; Pearce, M. J.; Phillips, P. D.; Pilcher, J. E.; Pinfold, J.; Plane, David E.; Poffenberger, P.; Poli, B.; Posthaus, A.; Pritchard, T. W.; Przysiezniak, H.; Rees, D. L.; Rigby, D.; Rison, M. G.; Robins, S. A.; Rodning, N.; Roney, J. M.; Ros, E.; Rossi, A. M.; Rosvick, M.; Routenburg, P.; Rozen, Y.; Runge, K.; Runolfsson, O.; Rust, D. R.; Rylko, R.; Sarkisian, E. K.G.; Sasaki, M.; Sbarra, C.; Schaile, A. D.; Schaile, O.; Scharf, F.; Scharff-Hansen, P.; Schenk, P.; Schmitt, B.; Schroder, Matthias; Schultz-Coulon, H. C.; Schulz, M.; Schutz, P.; Schwiening, J.; Scott, W. G.; Shears, T. G.; Shen, B. C.; Shepherd-Themistocleous, C. H.; Sherwood, P.; Siroli, G. P.; Sittler, A.; Skillman, A.; Skuja, A.; Smith, A. M.; Smith, T. J.; Snow, G. A.; Sobie, R.; Soldner-Rembold, S.; Springer, Robert Wayne; Sproston, M.; Stahl, A.; Starks, M.; Stegmann, C.; Stephens, K.; Steuerer, J.; Stockhausen, B.; Strom, David M.; Strumia, F.; Szymanski, P.; Tafirout, R.; Takeda, H.; Taras, P.; Tarem, S.; Tecchio, M.; Tesch, N.; Thomson, M. A.; von Torne, E.; Towers, S.; Tscheulin, M.; Tsukamoto, T.; Tsur, E.; Turcot, A. S.; Turner-Watson, M. F.; Utzat, P.; Van Kooten, Rick J.; Vasseur, G.; Vikas, P.; Vincter, M.; Vokurka, E. H.; Wackerle, F.; Wagner, A.; Wagner, D. L.; Ward, C. P.; Ward, D. R.; Ward, J. J.; Watkins, P. M.; Watson, A. T.; Watson, N. K.; Weber, P.; Wells, P. S.; Wermes, N.; Wilkens, B.; Wilson, G. W.; Wilson, J. A.; Wlodek, T.; Wolf, G.; Wotton, S.; Wyatt, T. R.; Xella, S.; Yamashita, S.; Yekutieli, G.; Zacek, V.

In: Zeitschrift fur Physik C-Particles and Fields, Vol. 70, No. 3, 01.01.1996, p. 357-369.

Research output: Contribution to journalArticle

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, Beaudoin, G, Bechtluft, J, Beck, GA, Beeston, C, Behnke, T, Bell, AN, Bell, KW, Bella, G, Bentvelsen, S, Berlich, P, Bethke, S, Biebel, O, Bloodworth, IJ, Bloomer, JE, Bock, P, Bosch, HM, Boutemeur, M, Bouwens, BT, Braibant, S, Bright-Thomas, P, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlesworth, C, Charlton, DG, Chrisman, D, Chu, SL, Clarke, PEL, Clowes, SG, Cohen, I, Conboy, JE, Cooke, OC, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Darling, C, De Jong, S, del Pozo, LA, Dixit, MS, do Couto e Silva, E, Duchovni, E, Duckeck, G, Duerdoth, IP, Dunwoody, UC, Edwards, JEG, Estabrooks, PG, Evans, HG, Fabbri, F, Fabbro, B, Fath, P, Fiedler, F, Fierro, M, Fincke-Keeler, M, Fischer, HM, Folman, R, Fong, DG, Foucher, M, Fukui, H, Furtjes, A, Gagnon, P, Gaidot, A, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Gensler, SW, Gentit, FX, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Goldberg, J, Goodrick, MJ, Gorn, W, Grandi, C, Gross, E, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Hargrove, CK, Hart, PA, Hartmann, C, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Herten, G, Heuer, RD, Hildreth, MD, Hill, JC, Hillier, SJ, Hilse, T, Hobson, PR, Hochman, D, Homer, RJ, Honma, AK, Horvath, D, Howard, R, Hughes-Jones, RE, Hutchcroft, DE, Igo-Kemenes, P, Imrie, DC, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, M, Jones, RWL, Jost, U, Jovanovic, P, Karlen, D, Kawamoto, T, Keeler, RK, Kellogg, RG, Kennedy, BW, King, BJ, King, J, Kirk, J, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Komamiya, S, Kowalewski, RV, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lafoux, H, Lahmann, R, Lai, WP, Lanske, D, Lauber, J, Layter, JG, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Lewis, C, Lloyd, SL, Loebinger, FK, Long, GD, Lorazo, B, Losty, MJ, Ludwig, J, Luig, A, Malik, A, Mannelli, M, Marcellini, S, Markus, C, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Matthews, W, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McNab, AI, 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, Muller, U, Nellen, B, Nijjhar, B, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oldershaw, NJ, Omori, T, Oram, CJ, Oreglia, MJ, Orito, S, Palazzo, M, Palinkas, J, Palmonari, FM, Pansart, JP, Pasztor, G, Pater, JR, Patrick, GN, Pearce, MJ, Phillips, PD, Pilcher, JE, Pinfold, J, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Pritchard, TW, Przysiezniak, H, Rees, DL, Rigby, D, Rison, MG, Robins, SA, Rodning, N, Roney, JM, Ros, E, Rossi, AM, Rosvick, M, Routenburg, P, Rozen, Y, Runge, K, Runolfsson, O, Rust, DR, Rylko, R, Sarkisian, EKG, Sasaki, M, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schmitt, B, Schroder, M, Schultz-Coulon, HC, Schulz, M, Schutz, P, Schwiening, J, 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, Soldner-Rembold, S, Springer, RW, Sproston, M, Stahl, A, Starks, M, Stegmann, C, Stephens, K, Steuerer, J, Stockhausen, B, Strom, DM, Strumia, F, Szymanski, P, Tafirout, R, Takeda, H, Taras, P, Tarem, S, Tecchio, M, Tesch, N, Thomson, MA, von Torne, E, Towers, S, Tscheulin, M, Tsukamoto, T, Tsur, E, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, RJ, Vasseur, G, Vikas, P, Vincter, M, Vokurka, EH, Wackerle, F, Wagner, A, Wagner, DL, Ward, CP, Ward, DR, Ward, JJ, Watkins, PM, Watson, AT, Watson, NK, Weber, P, Wells, PS, Wermes, N, Wilkens, B, Wilson, GW, Wilson, JA, Wlodek, T, Wolf, G, Wotton, S, Wyatt, TR, Xella, S, Yamashita, S, Yekutieli, G & Zacek, V 1996, 'Measurement of heavy quark forward-backward asymmetries and average B mixing using leptons in multihadronic events', Zeitschrift fur Physik C-Particles and Fields, vol. 70, no. 3, pp. 357-369. https://doi.org/10.1007/s002880050114
Alexander, G. ; Allison, John ; Altekamp, N. ; Ametewee, K. ; Anderson, K. J. ; Anderson, S. ; Arcelli, S. ; Asai, S. ; Axen, D. ; Azuelos, G. ; Ball, A. H. ; Barberio, E. ; Barlow, Roger J. ; Bartoldus, R. ; Batley, J. R. ; Beaudoin, G. ; Bechtluft, J. ; Beck, G. A. ; Beeston, C. ; Behnke, T. ; Bell, A. N. ; Bell, Kenneth Watson ; Bella, G. ; Bentvelsen, S. ; Berlich, P. ; Bethke, S. ; Biebel, O. ; Bloodworth, I. J. ; Bloomer, J. E. ; Bock, P. ; Bosch, H. M. ; Boutemeur, M. ; Bouwens, B. T. ; Braibant, S. ; Bright-Thomas, P. ; Brown, Robert M. ; Burckhart, H. J. ; Burgard, C. ; Burgin, R. ; Capiluppi, P. ; Carnegie, R. K. ; Carter, A. A. ; Carter, J. R. ; Chang, C. Y. ; Charlesworth, C. ; Charlton, David G. ; Chrisman, D. ; Chu, S. L. ; Clarke, P. E.L. ; Clowes, S. G. ; Cohen, I. ; Conboy, J. E. ; Cooke, O. C. ; Cuffiani, M. ; Dado, S. ; Dallapiccola, C. ; Dallavalle, G. Marco ; Darling, C. ; De Jong, S. ; del Pozo, L. A. ; Dixit, M. S. ; do Couto e Silva, E. ; Duchovni, E. ; Duckeck, G. ; Duerdoth, I. P. ; Dunwoody, U. C. ; Edwards, J. E.G. ; Estabrooks, P. G. ; Evans, H. G. ; Fabbri, F. ; Fabbro, B. ; Fath, P. ; Fiedler, F. ; Fierro, M. ; Fincke-Keeler, M. ; Fischer, H. M. ; Folman, R. ; Fong, D. G. ; Foucher, M. ; Fukui, H. ; Furtjes, A. ; Gagnon, P. ; Gaidot, A. ; Gary, J. W. ; Gascon, J. ; Gascon-Shotkin, S. M. ; Geddes, N. I. ; Geich-Gimbel, C. ; Gensler, S. W. ; Gentit, F. X. ; Geralis, T. ; Giacomelli, G. ; Giacomelli, P. ; Giacomelli, R. ; Gibson, V. ; Gibson, W. R. ; Gingrich, D. M. ; Goldberg, J. ; Goodrick, M. J. ; Gorn, W. ; Grandi, C. ; Gross, E. ; Hajdu, C. ; Hanson, G. G. ; Hansroul, M. ; Hapke, M. ; Hargrove, C. K. ; Hart, P. A. ; Hartmann, C. ; Hauschild, M. ; Hawkes, C. M. ; Hawkings, R. ; Hemingway, R. J. ; Herten, G. ; Heuer, R. D. ; Hildreth, M. D. ; Hill, J. C. ; Hillier, S. J. ; Hilse, T. ; Hobson, P. R. ; Hochman, D. ; Homer, R. J. ; Honma, A. K. ; Horvath, D. ; Howard, R. ; Hughes-Jones, R. E. ; Hutchcroft, D. E. ; Igo-Kemenes, P. ; Imrie, D. C. ; Jawahery, A. ; Jeffreys, P. W. ; Jeremie, H. ; Jimack, M. ; Joly, A. ; Jones, M. ; Jones, R. W.L. ; Jost, U. ; Jovanovic, P. ; Karlen, D. ; Kawamoto, T. ; Keeler, R. K. ; Kellogg, R. G. ; Kennedy, B. W. ; King, B. J. ; King, J. ; Kirk, J. ; Kluth, S. ; Kobayashi, T. ; Kobel, M. ; Koetke, D. S. ; Kokott, T. P. ; Komamiya, Sachio ; Kowalewski, Robert V. ; Kress, T. ; Krieger, P. ; von Krogh, J. ; Kyberd, P. ; Lafferty, G. D. ; Lafoux, H. ; Lahmann, R. ; Lai, W. P. ; Lanske, D. ; Lauber, J. ; Layter, J. G. ; Lee, A. M. ; Lefebvre, E. ; Lellouch, D. ; Letts, J. ; Levinson, L. ; Lewis, C. ; Lloyd, S. L. ; Loebinger, F. K. ; Long, G. D. ; Lorazo, B. ; Losty, M. J. ; Ludwig, J. ; Luig, A. ; Malik, A. ; Mannelli, M. ; Marcellini, S. ; Markus, C. ; Martin, A. J. ; Martin, J. P. ; Martinez, G. ; Mashimo, T. ; Matthews, W. ; Mattig, Peter ; McDonald, W. John ; McKenna, J. ; Mckigney, E. A. ; McMahon, T. J. ; McNab, A. I. ; Meijers, F. ; Menke, S. ; Merritt, F. S. ; Mes, H. ; Meyer, J. ; Michelini, A. ; Mikenberg, G. ; Miller, D. J. ; Mir, R. ; Mohr, W. ; Montanari, A. ; Mori, T. ; Morii, M. ; Muller, U. ; Nellen, B. ; Nijjhar, B. ; Nisius, R. ; O'Neale, S. W. ; Oakham, F. G. ; Odorici, F. ; Ogren, H. O. ; Oldershaw, N. J. ; Omori, T. ; Oram, C. J. ; Oreglia, M. J. ; Orito, S. ; Palazzo, M. ; Palinkas, J. ; Palmonari, F. M. ; Pansart, J. P. ; Pasztor, G. ; Pater, J. R. ; Patrick, G. N. ; Pearce, M. J. ; Phillips, P. D. ; Pilcher, J. E. ; Pinfold, J. ; Plane, David E. ; Poffenberger, P. ; Poli, B. ; Posthaus, A. ; Pritchard, T. W. ; Przysiezniak, H. ; Rees, D. L. ; Rigby, D. ; Rison, M. G. ; Robins, S. A. ; Rodning, N. ; Roney, J. M. ; Ros, E. ; Rossi, A. M. ; Rosvick, M. ; Routenburg, P. ; Rozen, Y. ; Runge, K. ; Runolfsson, O. ; Rust, D. R. ; Rylko, R. ; Sarkisian, E. K.G. ; Sasaki, M. ; Sbarra, C. ; Schaile, A. D. ; Schaile, O. ; Scharf, F. ; Scharff-Hansen, P. ; Schenk, P. ; Schmitt, B. ; Schroder, Matthias ; Schultz-Coulon, H. C. ; Schulz, M. ; Schutz, P. ; Schwiening, J. ; Scott, W. G. ; Shears, T. G. ; Shen, B. C. ; Shepherd-Themistocleous, C. H. ; Sherwood, P. ; Siroli, G. P. ; Sittler, A. ; Skillman, A. ; Skuja, A. ; Smith, A. M. ; Smith, T. J. ; Snow, G. A. ; Sobie, R. ; Soldner-Rembold, S. ; Springer, Robert Wayne ; Sproston, M. ; Stahl, A. ; Starks, M. ; Stegmann, C. ; Stephens, K. ; Steuerer, J. ; Stockhausen, B. ; Strom, David M. ; Strumia, F. ; Szymanski, P. ; Tafirout, R. ; Takeda, H. ; Taras, P. ; Tarem, S. ; Tecchio, M. ; Tesch, N. ; Thomson, M. A. ; von Torne, E. ; Towers, S. ; Tscheulin, M. ; Tsukamoto, T. ; Tsur, E. ; Turcot, A. S. ; Turner-Watson, M. F. ; Utzat, P. ; Van Kooten, Rick J. ; Vasseur, G. ; Vikas, P. ; Vincter, M. ; Vokurka, E. H. ; Wackerle, F. ; Wagner, A. ; Wagner, D. L. ; Ward, C. P. ; Ward, D. R. ; Ward, J. J. ; Watkins, P. M. ; Watson, A. T. ; Watson, N. K. ; Weber, P. ; Wells, P. S. ; Wermes, N. ; Wilkens, B. ; Wilson, G. W. ; Wilson, J. A. ; Wlodek, T. ; Wolf, G. ; Wotton, S. ; Wyatt, T. R. ; Xella, S. ; Yamashita, S. ; Yekutieli, G. ; Zacek, V. / Measurement of heavy quark forward-backward asymmetries and average B mixing using leptons in multihadronic events. In: Zeitschrift fur Physik C-Particles and Fields. 1996 ; Vol. 70, No. 3. pp. 357-369.
@article{29b82f8147dd476dabadbd0e0de50ef2,
title = "Measurement of heavy quark forward-backward asymmetries and average B mixing using leptons in multihadronic events",
abstract = "A measurement of the forward-backward asymmetries of e + e - →Z 0 →bb and e + e - ->Z°→cc̄ using electrons and muons produced in semileptonic decays of bottom and charm hadrons is presented. Two new variables designed to optimize flavour separation are used in a maximum likelihood fit to a sample of events containing one or two identified leptons, allowing the simultaneous extraction of the b and c quark forward-backward asymmetries as well as the average B°-B° mixing. Using all data collected by OPAL up to the end of 1994, the asymmetries are measured to be: A FB b = ( 5.5±2.4 ±0.3 ){\%} A FB b = (-7.5±3.4 ±0.6 ){\%} at (√s) = 89.52 GeV, A FB b = (9.06±0.51±0.23){\%} A FB b = ( 6.00±0.67±0.52)7c at (√s) = 91.24 GeV, A FB b =(11.7±2.0 ±0.3 ){\%} A FB b =( 14.l±2.8 ±0.9 ){\%} at (√s) = 92.94 GeV. For the average B°-B° mixing a value of: X = 0.1107 ±0.0062 ±0.0055, is obtained, where in each case the first error is statistical and the second systematic.",
author = "G. Alexander and John 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, {Roger J.} and R. Bartoldus and Batley, {J. R.} and G. Beaudoin and J. Bechtluft and Beck, {G. A.} and C. Beeston and T. Behnke and Bell, {A. N.} and Bell, {Kenneth Watson} and G. Bella and S. Bentvelsen and P. Berlich and S. Bethke and O. Biebel and Bloodworth, {I. J.} and Bloomer, {J. E.} and P. Bock and Bosch, {H. M.} and M. Boutemeur and Bouwens, {B. T.} and S. Braibant and P. Bright-Thomas and Brown, {Robert M.} and Burckhart, {H. J.} and C. Burgard and R. Burgin and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and C. Charlesworth and Charlton, {David G.} and D. Chrisman and Chu, {S. L.} and Clarke, {P. E.L.} and Clowes, {S. G.} and I. Cohen and Conboy, {J. E.} and Cooke, {O. C.} and M. Cuffiani and S. Dado and C. Dallapiccola and Dallavalle, {G. Marco} and C. Darling and {De Jong}, S. and {del Pozo}, {L. A.} and Dixit, {M. S.} and {do Couto e Silva}, E. and E. Duchovni and G. Duckeck and Duerdoth, {I. P.} and Dunwoody, {U. C.} and Edwards, {J. E.G.} and Estabrooks, {P. G.} and Evans, {H. G.} and F. Fabbri and B. Fabbro and P. Fath and F. Fiedler and M. Fierro and M. Fincke-Keeler and Fischer, {H. M.} and R. Folman and Fong, {D. G.} and M. Foucher and H. Fukui and A. Furtjes 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 Gensler, {S. W.} 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 J. Goldberg and Goodrick, {M. J.} and W. Gorn and C. Grandi and E. Gross 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 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 D. Hochman and Homer, {R. J.} and Honma, {A. K.} and D. Horvath and R. Howard and Hughes-Jones, {R. E.} and Hutchcroft, {D. E.} and P. Igo-Kemenes and Imrie, {D. C.} and A. Jawahery and Jeffreys, {P. W.} and H. Jeremie and M. Jimack and A. Joly and M. Jones and Jones, {R. W.L.} and U. Jost and P. Jovanovic and D. Karlen and T. Kawamoto and Keeler, {R. K.} and Kellogg, {R. G.} and Kennedy, {B. W.} and King, {B. J.} and J. King and J. Kirk and S. Kluth and T. Kobayashi and M. Kobel and Koetke, {D. S.} and Kokott, {T. P.} and Sachio Komamiya and Kowalewski, {Robert V.} 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 Layter, {J. G.} 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 B. Lorazo and Losty, {M. J.} and J. Ludwig and A. Luig 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 Peter Mattig and McDonald, {W. John} and J. McKenna and Mckigney, {E. A.} and McMahon, {T. J.} and McNab, {A. I.} 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. Muller 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 Oram, {C. J.} and Oreglia, {M. J.} and S. Orito and M. Palazzo and J. Palinkas and Palmonari, {F. M.} and Pansart, {J. P.} and G. Pasztor and Pater, {J. R.} and Patrick, {G. N.} and Pearce, {M. J.} and Phillips, {P. D.} and Pilcher, {J. E.} and J. Pinfold and Plane, {David E.} and P. Poffenberger and B. Poli and A. Posthaus and Pritchard, {T. W.} and H. Przysiezniak and Rees, {D. L.} and D. Rigby and Rison, {M. G.} and Robins, {S. A.} and N. Rodning and Roney, {J. M.} and E. Ros and Rossi, {A. M.} and M. Rosvick and P. Routenburg and Y. Rozen and K. Runge and O. Runolfsson and Rust, {D. R.} and R. Rylko and Sarkisian, {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 Matthias Schroder and Schultz-Coulon, {H. C.} and M. Schulz and P. Schutz and J. Schwiening 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. Soldner-Rembold and Springer, {Robert Wayne} and M. Sproston and A. Stahl and M. Starks and C. Stegmann and K. Stephens and J. Steuerer and B. Stockhausen and Strom, {David M.} and F. Strumia and P. Szymanski and R. Tafirout and H. Takeda and P. Taras and S. Tarem and M. Tecchio and N. Tesch and Thomson, {M. A.} and {von Torne}, E. and S. Towers and M. Tscheulin and T. Tsukamoto and E. Tsur and Turcot, {A. S.} and Turner-Watson, {M. F.} and P. Utzat and {Van Kooten}, {Rick J.} and G. Vasseur and P. Vikas and M. Vincter and Vokurka, {E. H.} and F. Wackerle and A. Wagner and Wagner, {D. L.} 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 P. Weber and Wells, {P. S.} and N. Wermes and B. Wilkens and Wilson, {G. W.} and Wilson, {J. A.} and T. Wlodek and G. Wolf and S. Wotton and Wyatt, {T. R.} and S. Xella and S. Yamashita and G. Yekutieli and V. Zacek",
year = "1996",
month = "1",
day = "1",
doi = "10.1007/s002880050114",
language = "English",
volume = "70",
pages = "357--369",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer New York",
number = "3",

}

TY - JOUR

T1 - Measurement of heavy quark forward-backward asymmetries and average B mixing using leptons in multihadronic events

AU - Alexander, G.

AU - Allison, John

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, Roger J.

AU - Bartoldus, R.

AU - Batley, J. R.

AU - Beaudoin, G.

AU - Bechtluft, J.

AU - Beck, G. A.

AU - Beeston, C.

AU - Behnke, T.

AU - Bell, A. N.

AU - Bell, Kenneth Watson

AU - Bella, G.

AU - Bentvelsen, S.

AU - Berlich, P.

AU - Bethke, S.

AU - Biebel, O.

AU - Bloodworth, I. J.

AU - Bloomer, J. E.

AU - Bock, P.

AU - Bosch, H. M.

AU - Boutemeur, M.

AU - Bouwens, B. T.

AU - Braibant, S.

AU - Bright-Thomas, P.

AU - Brown, Robert M.

AU - Burckhart, H. J.

AU - Burgard, C.

AU - Burgin, R.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlesworth, C.

AU - Charlton, David G.

AU - Chrisman, D.

AU - Chu, S. L.

AU - Clarke, P. E.L.

AU - Clowes, S. G.

AU - Cohen, I.

AU - Conboy, J. E.

AU - Cooke, O. C.

AU - Cuffiani, M.

AU - Dado, S.

AU - Dallapiccola, C.

AU - Dallavalle, G. Marco

AU - Darling, C.

AU - De Jong, S.

AU - del Pozo, L. A.

AU - Dixit, M. S.

AU - do Couto e Silva, E.

AU - Duchovni, E.

AU - Duckeck, G.

AU - Duerdoth, I. P.

AU - Dunwoody, U. C.

AU - Edwards, J. E.G.

AU - Estabrooks, P. G.

AU - Evans, H. G.

AU - Fabbri, F.

AU - Fabbro, B.

AU - Fath, P.

AU - Fiedler, F.

AU - Fierro, M.

AU - Fincke-Keeler, M.

AU - Fischer, H. M.

AU - Folman, R.

AU - Fong, D. G.

AU - Foucher, M.

AU - Fukui, H.

AU - Furtjes, 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 - Gensler, S. W.

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 - Goldberg, J.

AU - Goodrick, M. J.

AU - Gorn, W.

AU - Grandi, C.

AU - Gross, E.

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 - 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 - Hochman, D.

AU - Homer, R. J.

AU - Honma, A. K.

AU - Horvath, D.

AU - Howard, R.

AU - Hughes-Jones, R. E.

AU - Hutchcroft, D. E.

AU - Igo-Kemenes, P.

AU - Imrie, D. C.

AU - Jawahery, A.

AU - Jeffreys, P. W.

AU - Jeremie, H.

AU - Jimack, M.

AU - Joly, A.

AU - Jones, M.

AU - Jones, R. W.L.

AU - Jost, U.

AU - Jovanovic, P.

AU - Karlen, D.

AU - Kawamoto, T.

AU - Keeler, R. K.

AU - Kellogg, R. G.

AU - Kennedy, B. W.

AU - King, B. J.

AU - King, J.

AU - Kirk, J.

AU - Kluth, S.

AU - Kobayashi, T.

AU - Kobel, M.

AU - Koetke, D. S.

AU - Kokott, T. P.

AU - Komamiya, Sachio

AU - Kowalewski, Robert V.

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 - Layter, J. G.

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 - Lorazo, B.

AU - Losty, M. J.

AU - Ludwig, J.

AU - Luig, A.

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 - Mattig, Peter

AU - McDonald, W. John

AU - McKenna, J.

AU - Mckigney, E. A.

AU - McMahon, T. J.

AU - McNab, A. I.

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 - Muller, U.

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 - Oram, C. J.

AU - Oreglia, M. J.

AU - Orito, S.

AU - Palazzo, M.

AU - Palinkas, J.

AU - Palmonari, F. M.

AU - Pansart, J. P.

AU - Pasztor, G.

AU - Pater, J. R.

AU - Patrick, G. N.

AU - Pearce, M. J.

AU - Phillips, P. D.

AU - Pilcher, J. E.

AU - Pinfold, J.

AU - Plane, David E.

AU - Poffenberger, P.

AU - Poli, B.

AU - Posthaus, A.

AU - Pritchard, T. W.

AU - Przysiezniak, H.

AU - Rees, D. L.

AU - Rigby, D.

AU - Rison, M. G.

AU - Robins, S. A.

AU - Rodning, N.

AU - Roney, J. M.

AU - Ros, E.

AU - Rossi, A. M.

AU - Rosvick, M.

AU - Routenburg, P.

AU - Rozen, Y.

AU - Runge, K.

AU - Runolfsson, O.

AU - Rust, D. R.

AU - Rylko, R.

AU - Sarkisian, 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 - Schroder, Matthias

AU - Schultz-Coulon, H. C.

AU - Schulz, M.

AU - Schutz, P.

AU - Schwiening, J.

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 - Soldner-Rembold, S.

AU - Springer, Robert Wayne

AU - Sproston, M.

AU - Stahl, A.

AU - Starks, M.

AU - Stegmann, C.

AU - Stephens, K.

AU - Steuerer, J.

AU - Stockhausen, B.

AU - Strom, David M.

AU - Strumia, F.

AU - Szymanski, P.

AU - Tafirout, R.

AU - Takeda, H.

AU - Taras, P.

AU - Tarem, S.

AU - Tecchio, M.

AU - Tesch, N.

AU - Thomson, M. A.

AU - von Torne, E.

AU - Towers, S.

AU - Tscheulin, M.

AU - Tsukamoto, T.

AU - Tsur, E.

AU - Turcot, A. S.

AU - Turner-Watson, M. F.

AU - Utzat, P.

AU - Van Kooten, Rick J.

AU - Vasseur, G.

AU - Vikas, P.

AU - Vincter, M.

AU - Vokurka, E. H.

AU - Wackerle, F.

AU - Wagner, A.

AU - Wagner, D. L.

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 - Weber, P.

AU - Wells, P. S.

AU - Wermes, N.

AU - Wilkens, B.

AU - Wilson, G. W.

AU - Wilson, J. A.

AU - Wlodek, T.

AU - Wolf, G.

AU - Wotton, S.

AU - Wyatt, T. R.

AU - Xella, S.

AU - Yamashita, S.

AU - Yekutieli, G.

AU - Zacek, V.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - A measurement of the forward-backward asymmetries of e + e - →Z 0 →bb and e + e - ->Z°→cc̄ using electrons and muons produced in semileptonic decays of bottom and charm hadrons is presented. Two new variables designed to optimize flavour separation are used in a maximum likelihood fit to a sample of events containing one or two identified leptons, allowing the simultaneous extraction of the b and c quark forward-backward asymmetries as well as the average B°-B° mixing. Using all data collected by OPAL up to the end of 1994, the asymmetries are measured to be: A FB b = ( 5.5±2.4 ±0.3 )% A FB b = (-7.5±3.4 ±0.6 )% at (√s) = 89.52 GeV, A FB b = (9.06±0.51±0.23)% A FB b = ( 6.00±0.67±0.52)7c at (√s) = 91.24 GeV, A FB b =(11.7±2.0 ±0.3 )% A FB b =( 14.l±2.8 ±0.9 )% at (√s) = 92.94 GeV. For the average B°-B° mixing a value of: X = 0.1107 ±0.0062 ±0.0055, is obtained, where in each case the first error is statistical and the second systematic.

AB - A measurement of the forward-backward asymmetries of e + e - →Z 0 →bb and e + e - ->Z°→cc̄ using electrons and muons produced in semileptonic decays of bottom and charm hadrons is presented. Two new variables designed to optimize flavour separation are used in a maximum likelihood fit to a sample of events containing one or two identified leptons, allowing the simultaneous extraction of the b and c quark forward-backward asymmetries as well as the average B°-B° mixing. Using all data collected by OPAL up to the end of 1994, the asymmetries are measured to be: A FB b = ( 5.5±2.4 ±0.3 )% A FB b = (-7.5±3.4 ±0.6 )% at (√s) = 89.52 GeV, A FB b = (9.06±0.51±0.23)% A FB b = ( 6.00±0.67±0.52)7c at (√s) = 91.24 GeV, A FB b =(11.7±2.0 ±0.3 )% A FB b =( 14.l±2.8 ±0.9 )% at (√s) = 92.94 GeV. For the average B°-B° mixing a value of: X = 0.1107 ±0.0062 ±0.0055, is obtained, where in each case the first error is statistical and the second systematic.

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U2 - 10.1007/s002880050114

DO - 10.1007/s002880050114

M3 - Article

AN - SCOPUS:0000257126

VL - 70

SP - 357

EP - 369

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 3

ER -