Production rates of bb̄ quark pairs from gluons and bb̄bb̄ events in hadronic Z0 decays

G. Abbiendi, K. Ackerstaff, C. Ainsley, P. F. Akesson, G. Alexander, J. Allison, K. J. Anderson, S. Arcelli, S. Asai, S. F. Ashby, D. Axen, G. Azuelos, I. Bailey, A. H. Ball, E. Barberio, R. J. Barlow, S. Baumann, T. Behnke, K. W. Bell, G. BellaA. Bellerive, S. Bentvelsen, S. Bethke, O. Biebel, I. J. Bloodworth, P. Bock, J. Böhme, O. Boeriu, D. Bonacorsi, M. Boutemeur, S. Braibant, P. Bright-Thomas, L. Brigliadori, R. M. Brown, H. J. Burckhart, J. Cammin, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, C. Ciocca, P. E L Clarke, E. Clay, I. Cohen, O. C. Cooke, J. Couchman, C. Couyoumtzelis, R. L. Coxe, M. Cuffiani, S. Dado, G. M. Dallavalle, S. Dallison, A. de Roeck, P. Dervan, K. Desch, B. Dienes, M. S. Dixit, M. Donkers, J. Dubbert, E. Duchovni, G. Duckeck, I. P. Duerdoth, P. G. Estabrooks, E. Etzion, F. Fabbri, M. Fanti, L. Feld, P. Ferrari, F. Fiedler, I. Fleck, M. Ford, A. Frey, A. Förtjes, D. I. Futyan, P. Gagnon, J. W. Gary, G. Gaycken, C. Geich-Gimbel, G. Giacomelli, P. Giacomelli, D. Glenzinski, J. Goldberg, C. Grandi, K. Graham, E. Gross, J. Grunhaus, M. Gruwé, P. O. Gönther, C. Hajdu, G. G. Hanson, M. Hansroul, M. Hapke, K. Harder, A. Harel, C. K. Hargrove, M. Harin-Dirac, A. Hauke, M. Hauschild, C. M. Hawkes, R. Hawkings, R. J. Hemingway, C. Hensel, G. Herten, R. D. Heuer, M. D. Hildreth, J. C. Hill, A. Hocker, K. Hoffman, R. J. Homer, A. K. Honma, D. Horváth, K. R. Hossain, R. Howard, P. Hüntemeyer, P. Igo-Kemenes, K. Ishii, F. R. Jacob, A. Jawahery, H. Jeremie, C. R. Jones, P. Jovanovic, T. R. Junk, N. Kanaya, J. Kanzaki, G. Karapetian, D. Karlen, V. Kartvelishvili, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, D. H. Kim, K. Klein, A. Klier, T. Kobayashi, M. Kobel, T. P. Kokott, S. Komamiya, R. V. Kowalewski, T. Kress, P. Krieger, J. von Krogh, T. Kuhl, M. Kupper, P. Kyberd, G. D. Lafferty, H. Landsman, D. Lanske, I. Lawson, J. G. Layter, A. Leins, D. Lellouch, J. Letts, L. Levinson, R. Liebisch, J. Lillich, B. List, C. Littlewood, A. W. Lloyd, S. L. Lloyd, F. K. Loebinger, G. D. Long, M. J. Losty, J. Lu, J. Ludwig, A. Macchiolo, A. Macpherson, W. Mader, M. Mannelli, S. Marcellini, T. E. Marchant, A. J. Martin, J. P. Martin, G. Martinez, T. Mashimo, P. Mättig, W. J. McDonald, J. McKenna, T. J. McMahon, R. A. McPherson, F. Meijers, P. Mendez-Lorenzo, F. S. Merritt, H. Mes, A. Michelini, S. Mihara, G. Mikenberg, D. J. Miller, W. Mohr, A. Montanari, T. Mori, K. Nagai, I. Nakamura, H. A. Neal, R. Nisius, S. W. O'Neale, F. G. Oakham, F. Odorici, H. O. Ogren, A. Oh, A. Okpara, M. J. Oreglia, S. Orito, G. Pásztor, J. R. Pater, G. N. Patrick, J. Patt, P. Pfeifenschneider, J. E. Pilcher, J. Pinfold, D. E. Plane, B. Poli, J. Polok, O. Pooth, M. Przybycień, A. Quadt, C. Rembser, H. Rick, S. A. Robins, N. Rodning, J. M. Roney, S. Rosati, K. Roscoe, A. M. Rossi, Y. Rozen, K. Runge, O. Runolfsson, D. R. Rust, K. Sachs, T. Saeki, O. Sahr, E. K G Sarkisyan, C. Sbarra, A. D. Schaile, O. Schaile, P. Scharff-Hansen, S. Schmitt, M. Schröder, M. Schumacher, C. Schwick, W. G. Scott, R. Seuster, T. G. Shears, B. C. Shen, C. H. Shepherd-Themistocleous, P. Sherwood, G. P. Siroli, A. Skuja, A. M. Smith, G. A. Snow, R. Sobie, S. Söldner-Rembold, S. Spagnolo, M. Sproston, A. Stahl, K. Stephens, K. Stoll, D. Strom, R. Ströhmer, B. Surrow, S. D. Talbot, S. Tarem, R. J. Taylor, R. Teuscher, M. Thiergen, J. Thomas, M. A. Thomson, E. Torrence, S. Towers, T. Trefzger, I. Trigger, Z. Trócsányi, E. Tsur, M. F. Turner-Watson, I. Ueda, P. Vannerem, M. Verzocchi, H. Voss, J. Vossebeld, D. Waller, C. P. Ward, D. R. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. S. Wells, T. Wengler, N. Wermes, D. Wetterling, J. S. White, G. W. Wilson, J. A. Wilson, T. R. Wyatt, S. Yamashita, V. Zacek, D. Zer-Zion

Research output: Contribution to journalArticle

Abstract

The rates are measured per hadronic Z0 decay for gluon splitting to bb̄ quark pairs, gbb̄, and of events containing two bb̄ quark pairs, g4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb̄ quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two bb̄ quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of gbb̄ and g4b, namely gbb̄ = (3.07 ± 0.53(stat) ± 0.97(syst)) × 10-3, g4b = (0.36 ± 0.17(stat) ± 0.27(syst)) × 10-3.

Original languageEnglish (US)
Pages (from-to)447-460
Number of pages14
JournalEuropean Physical Journal C
Volume18
Issue number3
StatePublished - 2001
Externally publishedYes

Fingerprint

gluons
quarks
decay
apexes
Topology
Detectors
topology
detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Abbiendi, G., Ackerstaff, K., Ainsley, C., Akesson, P. F., Alexander, G., Allison, J., ... Zer-Zion, D. (2001). Production rates of bb̄ quark pairs from gluons and bb̄bb̄ events in hadronic Z0 decays. European Physical Journal C, 18(3), 447-460.

Production rates of bb̄ quark pairs from gluons and bb̄bb̄ events in hadronic Z0 decays. / Abbiendi, G.; Ackerstaff, K.; Ainsley, C.; Akesson, P. F.; Alexander, G.; Allison, J.; Anderson, K. J.; Arcelli, S.; Asai, S.; Ashby, S. F.; Axen, D.; Azuelos, G.; Bailey, I.; Ball, A. H.; Barberio, E.; Barlow, R. J.; Baumann, S.; Behnke, T.; Bell, K. W.; Bella, G.; Bellerive, A.; Bentvelsen, S.; Bethke, S.; Biebel, O.; Bloodworth, I. J.; Bock, P.; Böhme, J.; Boeriu, O.; Bonacorsi, D.; Boutemeur, M.; Braibant, S.; Bright-Thomas, P.; Brigliadori, L.; Brown, R. M.; Burckhart, H. J.; Cammin, J.; Capiluppi, P.; Carnegie, R. K.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlton, D. G.; Ciocca, C.; Clarke, P. E L; Clay, E.; Cohen, I.; Cooke, O. C.; Couchman, J.; Couyoumtzelis, C.; Coxe, R. L.; Cuffiani, M.; Dado, S.; Dallavalle, G. M.; Dallison, S.; de Roeck, A.; Dervan, P.; Desch, K.; Dienes, B.; Dixit, M. S.; Donkers, M.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Estabrooks, P. G.; Etzion, E.; Fabbri, F.; Fanti, M.; Feld, L.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Förtjes, A.; Futyan, D. I.; Gagnon, P.; Gary, J. W.; Gaycken, G.; Geich-Gimbel, C.; Giacomelli, G.; Giacomelli, P.; Glenzinski, D.; Goldberg, J.; Grandi, C.; Graham, K.; Gross, E.; Grunhaus, J.; Gruwé, M.; Gönther, P. O.; Hajdu, C.; Hanson, G. G.; Hansroul, M.; Hapke, M.; Harder, K.; Harel, A.; Hargrove, C. K.; Harin-Dirac, M.; Hauke, A.; Hauschild, M.; Hawkes, C. M.; Hawkings, R.; Hemingway, R. J.; Hensel, C.; Herten, G.; Heuer, R. D.; Hildreth, M. D.; Hill, J. C.; Hocker, A.; Hoffman, K.; Homer, R. J.; Honma, A. K.; Horváth, D.; Hossain, K. R.; Howard, R.; Hüntemeyer, P.; Igo-Kemenes, P.; Ishii, K.; Jacob, F. R.; Jawahery, A.; Jeremie, H.; Jones, C. R.; Jovanovic, P.; Junk, T. R.; Kanaya, N.; Kanzaki, J.; Karapetian, G.; Karlen, D.; Kartvelishvili, V.; Kawagoe, K.; Kawamoto, T.; Keeler, R. K.; Kellogg, R. G.; Kennedy, B. W.; Kim, D. H.; Klein, K.; Klier, A.; Kobayashi, T.; Kobel, M.; Kokott, T. P.; Komamiya, S.; Kowalewski, R. V.; Kress, T.; Krieger, P.; von Krogh, J.; Kuhl, T.; Kupper, M.; Kyberd, P.; Lafferty, G. D.; Landsman, H.; Lanske, D.; Lawson, I.; Layter, J. G.; Leins, A.; Lellouch, D.; Letts, J.; Levinson, L.; Liebisch, R.; Lillich, J.; List, B.; Littlewood, C.; Lloyd, A. W.; Lloyd, S. L.; Loebinger, F. K.; Long, G. D.; Losty, M. J.; Lu, J.; Ludwig, J.; Macchiolo, A.; Macpherson, A.; Mader, W.; Mannelli, M.; Marcellini, S.; Marchant, T. E.; Martin, A. J.; Martin, J. P.; Martinez, G.; Mashimo, T.; Mättig, P.; McDonald, W. J.; McKenna, J.; McMahon, T. J.; McPherson, R. A.; Meijers, F.; Mendez-Lorenzo, P.; Merritt, F. S.; Mes, H.; Michelini, A.; Mihara, S.; Mikenberg, G.; Miller, D. J.; Mohr, W.; Montanari, A.; Mori, T.; Nagai, K.; Nakamura, I.; Neal, H. A.; Nisius, R.; O'Neale, S. W.; Oakham, F. G.; Odorici, F.; Ogren, H. O.; Oh, A.; Okpara, A.; Oreglia, M. J.; Orito, S.; Pásztor, G.; Pater, J. R.; Patrick, G. N.; Patt, J.; Pfeifenschneider, P.; Pilcher, J. E.; Pinfold, J.; Plane, D. E.; Poli, B.; Polok, J.; Pooth, O.; Przybycień, M.; Quadt, A.; Rembser, C.; Rick, H.; Robins, S. A.; Rodning, N.; Roney, J. M.; Rosati, S.; Roscoe, K.; Rossi, A. M.; Rozen, Y.; Runge, K.; Runolfsson, O.; Rust, D. R.; Sachs, K.; Saeki, T.; Sahr, O.; Sarkisyan, E. K G; Sbarra, C.; Schaile, A. D.; Schaile, O.; Scharff-Hansen, P.; Schmitt, S.; Schröder, M.; Schumacher, M.; Schwick, C.; Scott, W. G.; Seuster, R.; Shears, T. G.; Shen, B. C.; Shepherd-Themistocleous, C. H.; Sherwood, P.; Siroli, G. P.; Skuja, A.; Smith, A. M.; Snow, G. A.; Sobie, R.; Söldner-Rembold, S.; Spagnolo, S.; Sproston, M.; Stahl, A.; Stephens, K.; Stoll, K.; Strom, D.; Ströhmer, R.; Surrow, B.; Talbot, S. D.; Tarem, S.; Taylor, R. J.; Teuscher, R.; Thiergen, M.; Thomas, J.; Thomson, M. A.; Torrence, E.; Towers, S.; Trefzger, T.; Trigger, I.; Trócsányi, Z.; Tsur, E.; Turner-Watson, M. F.; Ueda, I.; Vannerem, P.; Verzocchi, M.; Voss, H.; Vossebeld, J.; Waller, D.; Ward, C. P.; Ward, D. R.; Watkins, P. M.; Watson, A. T.; Watson, N. K.; Wells, P. S.; Wengler, T.; Wermes, N.; Wetterling, D.; White, J. S.; Wilson, G. W.; Wilson, J. A.; Wyatt, T. R.; Yamashita, S.; Zacek, V.; Zer-Zion, D.

In: European Physical Journal C, Vol. 18, No. 3, 2001, p. 447-460.

Research output: Contribution to journalArticle

Abbiendi, G, Ackerstaff, K, Ainsley, C, Akesson, PF, Alexander, G, Allison, J, Anderson, KJ, Arcelli, S, Asai, S, Ashby, SF, Axen, D, Azuelos, G, Bailey, I, Ball, AH, Barberio, E, Barlow, RJ, Baumann, S, Behnke, T, Bell, KW, Bella, G, Bellerive, A, Bentvelsen, S, Bethke, S, Biebel, O, Bloodworth, IJ, Bock, P, Böhme, J, Boeriu, O, Bonacorsi, D, Boutemeur, M, Braibant, S, Bright-Thomas, P, Brigliadori, L, Brown, RM, Burckhart, HJ, Cammin, J, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Ciocca, C, Clarke, PEL, Clay, E, Cohen, I, Cooke, OC, Couchman, J, Couyoumtzelis, C, Coxe, RL, Cuffiani, M, Dado, S, Dallavalle, GM, Dallison, S, de Roeck, A, Dervan, P, Desch, K, Dienes, B, Dixit, MS, Donkers, M, Dubbert, J, Duchovni, E, Duckeck, G, Duerdoth, IP, Estabrooks, PG, Etzion, E, Fabbri, F, Fanti, M, Feld, L, Ferrari, P, Fiedler, F, Fleck, I, Ford, M, Frey, A, Förtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gaycken, G, Geich-Gimbel, C, Giacomelli, G, Giacomelli, P, Glenzinski, D, Goldberg, J, Grandi, C, Graham, K, Gross, E, Grunhaus, J, Gruwé, M, Gönther, PO, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Harder, K, Harel, A, Hargrove, CK, Harin-Dirac, M, Hauke, A, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Hensel, C, Herten, G, Heuer, RD, Hildreth, MD, Hill, JC, Hocker, A, Hoffman, K, Homer, RJ, Honma, AK, Horváth, D, Hossain, KR, Howard, R, Hüntemeyer, P, Igo-Kemenes, P, Ishii, K, Jacob, FR, Jawahery, A, Jeremie, H, Jones, CR, Jovanovic, P, Junk, TR, Kanaya, N, Kanzaki, J, Karapetian, G, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Keeler, RK, Kellogg, RG, Kennedy, BW, Kim, DH, Klein, K, Klier, A, Kobayashi, T, Kobel, M, Kokott, TP, Komamiya, S, Kowalewski, RV, Kress, T, Krieger, P, von Krogh, J, Kuhl, T, Kupper, M, Kyberd, P, Lafferty, GD, Landsman, H, Lanske, D, Lawson, I, Layter, JG, Leins, A, Lellouch, D, Letts, J, Levinson, L, Liebisch, R, Lillich, J, List, B, Littlewood, C, Lloyd, AW, Lloyd, SL, Loebinger, FK, Long, GD, Losty, MJ, Lu, J, Ludwig, J, Macchiolo, A, Macpherson, A, Mader, W, Mannelli, M, Marcellini, S, Marchant, TE, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Mättig, P, McDonald, WJ, McKenna, J, McMahon, TJ, McPherson, RA, Meijers, F, Mendez-Lorenzo, P, Merritt, FS, Mes, H, Michelini, A, Mihara, S, Mikenberg, G, Miller, DJ, Mohr, W, Montanari, A, Mori, T, Nagai, K, Nakamura, I, Neal, HA, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Okpara, A, Oreglia, MJ, Orito, S, Pásztor, G, Pater, JR, Patrick, GN, Patt, J, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Plane, DE, Poli, B, Polok, J, Pooth, O, Przybycień, M, Quadt, A, Rembser, C, Rick, H, Robins, SA, Rodning, N, Roney, JM, Rosati, S, Roscoe, K, Rossi, AM, Rozen, Y, Runge, K, Runolfsson, O, Rust, DR, Sachs, K, Saeki, T, Sahr, O, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Schaile, O, Scharff-Hansen, P, Schmitt, S, Schröder, M, Schumacher, M, Schwick, C, Scott, WG, Seuster, R, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Söldner-Rembold, S, Spagnolo, S, Sproston, M, Stahl, A, Stephens, K, Stoll, K, Strom, D, Ströhmer, R, Surrow, B, Talbot, SD, Tarem, S, Taylor, RJ, Teuscher, R, Thiergen, M, Thomas, J, Thomson, MA, Torrence, E, Towers, S, Trefzger, T, Trigger, I, Trócsányi, Z, Tsur, E, Turner-Watson, MF, Ueda, I, Vannerem, P, Verzocchi, M, Voss, H, Vossebeld, J, Waller, D, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wengler, T, Wermes, N, Wetterling, D, White, JS, Wilson, GW, Wilson, JA, Wyatt, TR, Yamashita, S, Zacek, V & Zer-Zion, D 2001, 'Production rates of bb̄ quark pairs from gluons and bb̄bb̄ events in hadronic Z0 decays', European Physical Journal C, vol. 18, no. 3, pp. 447-460.
Abbiendi G, Ackerstaff K, Ainsley C, Akesson PF, Alexander G, Allison J et al. Production rates of bb̄ quark pairs from gluons and bb̄bb̄ events in hadronic Z0 decays. European Physical Journal C. 2001;18(3):447-460.
Abbiendi, G. ; Ackerstaff, K. ; Ainsley, C. ; Akesson, P. F. ; Alexander, G. ; Allison, J. ; Anderson, K. J. ; Arcelli, S. ; Asai, S. ; Ashby, S. F. ; Axen, D. ; Azuelos, G. ; Bailey, I. ; Ball, A. H. ; Barberio, E. ; Barlow, R. J. ; Baumann, S. ; Behnke, T. ; Bell, K. W. ; Bella, G. ; Bellerive, A. ; Bentvelsen, S. ; Bethke, S. ; Biebel, O. ; Bloodworth, I. J. ; Bock, P. ; Böhme, J. ; Boeriu, O. ; Bonacorsi, D. ; Boutemeur, M. ; Braibant, S. ; Bright-Thomas, P. ; Brigliadori, L. ; Brown, R. M. ; Burckhart, H. J. ; Cammin, J. ; Capiluppi, P. ; Carnegie, R. K. ; Carter, A. A. ; Carter, J. R. ; Chang, C. Y. ; Charlton, D. G. ; Ciocca, C. ; Clarke, P. E L ; Clay, E. ; Cohen, I. ; Cooke, O. C. ; Couchman, J. ; Couyoumtzelis, C. ; Coxe, R. L. ; Cuffiani, M. ; Dado, S. ; Dallavalle, G. M. ; Dallison, S. ; de Roeck, A. ; Dervan, P. ; Desch, K. ; Dienes, B. ; Dixit, M. S. ; Donkers, M. ; Dubbert, J. ; Duchovni, E. ; Duckeck, G. ; Duerdoth, I. P. ; Estabrooks, P. G. ; Etzion, E. ; Fabbri, F. ; Fanti, M. ; Feld, L. ; Ferrari, P. ; Fiedler, F. ; Fleck, I. ; Ford, M. ; Frey, A. ; Förtjes, A. ; Futyan, D. I. ; Gagnon, P. ; Gary, J. W. ; Gaycken, G. ; Geich-Gimbel, C. ; Giacomelli, G. ; Giacomelli, P. ; Glenzinski, D. ; Goldberg, J. ; Grandi, C. ; Graham, K. ; Gross, E. ; Grunhaus, J. ; Gruwé, M. ; Gönther, P. O. ; Hajdu, C. ; Hanson, G. G. ; Hansroul, M. ; Hapke, M. ; Harder, K. ; Harel, A. ; Hargrove, C. K. ; Harin-Dirac, M. ; Hauke, A. ; Hauschild, M. ; Hawkes, C. M. ; Hawkings, R. ; Hemingway, R. J. ; Hensel, C. ; Herten, G. ; Heuer, R. D. ; Hildreth, M. D. ; Hill, J. C. ; Hocker, A. ; Hoffman, K. ; Homer, R. J. ; Honma, A. K. ; Horváth, D. ; Hossain, K. R. ; Howard, R. ; Hüntemeyer, P. ; Igo-Kemenes, P. ; Ishii, K. ; Jacob, F. R. ; Jawahery, A. ; Jeremie, H. ; Jones, C. R. ; Jovanovic, P. ; Junk, T. R. ; Kanaya, N. ; Kanzaki, J. ; Karapetian, G. ; Karlen, D. ; Kartvelishvili, V. ; Kawagoe, K. ; Kawamoto, T. ; Keeler, R. K. ; Kellogg, R. G. ; Kennedy, B. W. ; Kim, D. H. ; Klein, K. ; Klier, A. ; Kobayashi, T. ; Kobel, M. ; Kokott, T. P. ; Komamiya, S. ; Kowalewski, R. V. ; Kress, T. ; Krieger, P. ; von Krogh, J. ; Kuhl, T. ; Kupper, M. ; Kyberd, P. ; Lafferty, G. D. ; Landsman, H. ; Lanske, D. ; Lawson, I. ; Layter, J. G. ; Leins, A. ; Lellouch, D. ; Letts, J. ; Levinson, L. ; Liebisch, R. ; Lillich, J. ; List, B. ; Littlewood, C. ; Lloyd, A. W. ; Lloyd, S. L. ; Loebinger, F. K. ; Long, G. D. ; Losty, M. J. ; Lu, J. ; Ludwig, J. ; Macchiolo, A. ; Macpherson, A. ; Mader, W. ; Mannelli, M. ; Marcellini, S. ; Marchant, T. E. ; Martin, A. J. ; Martin, J. P. ; Martinez, G. ; Mashimo, T. ; Mättig, P. ; McDonald, W. J. ; McKenna, J. ; McMahon, T. J. ; McPherson, R. A. ; Meijers, F. ; Mendez-Lorenzo, P. ; Merritt, F. S. ; Mes, H. ; Michelini, A. ; Mihara, S. ; Mikenberg, G. ; Miller, D. J. ; Mohr, W. ; Montanari, A. ; Mori, T. ; Nagai, K. ; Nakamura, I. ; Neal, H. A. ; Nisius, R. ; O'Neale, S. W. ; Oakham, F. G. ; Odorici, F. ; Ogren, H. O. ; Oh, A. ; Okpara, A. ; Oreglia, M. J. ; Orito, S. ; Pásztor, G. ; Pater, J. R. ; Patrick, G. N. ; Patt, J. ; Pfeifenschneider, P. ; Pilcher, J. E. ; Pinfold, J. ; Plane, D. E. ; Poli, B. ; Polok, J. ; Pooth, O. ; Przybycień, M. ; Quadt, A. ; Rembser, C. ; Rick, H. ; Robins, S. A. ; Rodning, N. ; Roney, J. M. ; Rosati, S. ; Roscoe, K. ; Rossi, A. M. ; Rozen, Y. ; Runge, K. ; Runolfsson, O. ; Rust, D. R. ; Sachs, K. ; Saeki, T. ; Sahr, O. ; Sarkisyan, E. K G ; Sbarra, C. ; Schaile, A. D. ; Schaile, O. ; Scharff-Hansen, P. ; Schmitt, S. ; Schröder, M. ; Schumacher, M. ; Schwick, C. ; Scott, W. G. ; Seuster, R. ; Shears, T. G. ; Shen, B. C. ; Shepherd-Themistocleous, C. H. ; Sherwood, P. ; Siroli, G. P. ; Skuja, A. ; Smith, A. M. ; Snow, G. A. ; Sobie, R. ; Söldner-Rembold, S. ; Spagnolo, S. ; Sproston, M. ; Stahl, A. ; Stephens, K. ; Stoll, K. ; Strom, D. ; Ströhmer, R. ; Surrow, B. ; Talbot, S. D. ; Tarem, S. ; Taylor, R. J. ; Teuscher, R. ; Thiergen, M. ; Thomas, J. ; Thomson, M. A. ; Torrence, E. ; Towers, S. ; Trefzger, T. ; Trigger, I. ; Trócsányi, Z. ; Tsur, E. ; Turner-Watson, M. F. ; Ueda, I. ; Vannerem, P. ; Verzocchi, M. ; Voss, H. ; Vossebeld, J. ; Waller, D. ; Ward, C. P. ; Ward, D. R. ; Watkins, P. M. ; Watson, A. T. ; Watson, N. K. ; Wells, P. S. ; Wengler, T. ; Wermes, N. ; Wetterling, D. ; White, J. S. ; Wilson, G. W. ; Wilson, J. A. ; Wyatt, T. R. ; Yamashita, S. ; Zacek, V. ; Zer-Zion, D. / Production rates of bb̄ quark pairs from gluons and bb̄bb̄ events in hadronic Z0 decays. In: European Physical Journal C. 2001 ; Vol. 18, No. 3. pp. 447-460.
@article{51d92d9e3a704133b49077aabbe7334a,
title = "Production rates of bb̄ quark pairs from gluons and bb̄bb̄ events in hadronic Z0 decays",
abstract = "The rates are measured per hadronic Z0 decay for gluon splitting to bb̄ quark pairs, gbb̄, and of events containing two bb̄ quark pairs, g4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb̄ quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two bb̄ quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of gbb̄ and g4b, namely gbb̄ = (3.07 ± 0.53(stat) ± 0.97(syst)) × 10-3, g4b = (0.36 ± 0.17(stat) ± 0.27(syst)) × 10-3.",
author = "G. Abbiendi and K. Ackerstaff and C. Ainsley and Akesson, {P. F.} and G. Alexander and J. Allison and Anderson, {K. J.} and S. Arcelli and S. Asai and Ashby, {S. F.} and D. Axen and G. Azuelos and I. Bailey and Ball, {A. H.} and E. Barberio and Barlow, {R. J.} and S. Baumann and T. Behnke and Bell, {K. W.} and G. Bella and A. Bellerive and S. Bentvelsen and S. Bethke and O. Biebel and Bloodworth, {I. J.} and P. Bock and J. B{\"o}hme and O. Boeriu and D. Bonacorsi and M. Boutemeur and S. Braibant and P. Bright-Thomas and L. Brigliadori and Brown, {R. M.} and Burckhart, {H. J.} and J. Cammin and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and C. Ciocca and Clarke, {P. E L} and E. Clay and I. Cohen and Cooke, {O. C.} and J. Couchman and C. Couyoumtzelis and Coxe, {R. L.} and M. Cuffiani and S. Dado and Dallavalle, {G. M.} and S. Dallison and {de Roeck}, A. and P. Dervan and K. Desch and B. Dienes and Dixit, {M. S.} and M. Donkers and J. Dubbert and E. Duchovni and G. Duckeck and Duerdoth, {I. P.} and Estabrooks, {P. G.} and E. Etzion and F. Fabbri and M. Fanti and L. Feld and P. Ferrari and F. Fiedler and I. Fleck and M. Ford and A. Frey and A. F{\"o}rtjes and Futyan, {D. I.} and P. Gagnon and Gary, {J. W.} and G. Gaycken and C. Geich-Gimbel and G. Giacomelli and P. Giacomelli and D. Glenzinski and J. Goldberg and C. Grandi and K. Graham and E. Gross and J. Grunhaus and M. Gruw{\'e} and G{\"o}nther, {P. O.} and C. Hajdu and Hanson, {G. G.} and M. Hansroul and M. Hapke and K. Harder and A. Harel and Hargrove, {C. K.} and M. Harin-Dirac and A. Hauke and M. Hauschild and Hawkes, {C. M.} and R. Hawkings and Hemingway, {R. J.} and C. Hensel and G. Herten and Heuer, {R. D.} and Hildreth, {M. D.} and Hill, {J. C.} and A. Hocker and K. Hoffman and Homer, {R. J.} and Honma, {A. K.} and D. Horv{\'a}th and Hossain, {K. R.} and R. Howard and P. H{\"u}ntemeyer and P. Igo-Kemenes and K. Ishii and Jacob, {F. R.} and A. Jawahery and H. Jeremie and Jones, {C. R.} and P. Jovanovic and Junk, {T. R.} and N. Kanaya and J. Kanzaki and G. Karapetian and D. Karlen and V. Kartvelishvili and K. Kawagoe and T. Kawamoto and Keeler, {R. K.} and Kellogg, {R. G.} and Kennedy, {B. W.} and Kim, {D. H.} and K. Klein and A. Klier and T. Kobayashi and M. Kobel and Kokott, {T. P.} and S. Komamiya and Kowalewski, {R. V.} and T. Kress and P. Krieger and {von Krogh}, J. and T. Kuhl and M. Kupper and P. Kyberd and Lafferty, {G. D.} and H. Landsman and D. Lanske and I. Lawson and Layter, {J. G.} and A. Leins and D. Lellouch and J. Letts and L. Levinson and R. Liebisch and J. Lillich and B. List and C. Littlewood and Lloyd, {A. W.} and Lloyd, {S. L.} and Loebinger, {F. K.} and Long, {G. D.} and Losty, {M. J.} and J. Lu and J. Ludwig and A. Macchiolo and A. Macpherson and W. Mader and M. Mannelli and S. Marcellini and Marchant, {T. E.} and Martin, {A. J.} and Martin, {J. P.} and G. Martinez and T. Mashimo and P. M{\"a}ttig and McDonald, {W. J.} and J. McKenna and McMahon, {T. J.} and McPherson, {R. A.} and F. Meijers and P. Mendez-Lorenzo and Merritt, {F. S.} and H. Mes and A. Michelini and S. Mihara and G. Mikenberg and Miller, {D. J.} and W. Mohr and A. Montanari and T. Mori and K. Nagai and I. Nakamura and Neal, {H. A.} and R. Nisius and O'Neale, {S. W.} and Oakham, {F. G.} and F. Odorici and Ogren, {H. O.} and A. Oh and A. Okpara and Oreglia, {M. J.} and S. Orito and G. P{\'a}sztor and Pater, {J. R.} and Patrick, {G. N.} and J. Patt and P. Pfeifenschneider and Pilcher, {J. E.} and J. Pinfold and Plane, {D. E.} and B. Poli and J. Polok and O. Pooth and M. Przybycień and A. Quadt and C. Rembser and H. Rick and Robins, {S. A.} and N. Rodning and Roney, {J. M.} and S. Rosati and K. Roscoe and Rossi, {A. M.} and Y. Rozen and K. Runge and O. Runolfsson and Rust, {D. R.} and K. Sachs and T. Saeki and O. Sahr and Sarkisyan, {E. K G} and C. Sbarra and Schaile, {A. D.} and O. Schaile and P. Scharff-Hansen and S. Schmitt and M. Schr{\"o}der and M. Schumacher and C. Schwick and Scott, {W. G.} and R. Seuster and Shears, {T. G.} and Shen, {B. C.} and Shepherd-Themistocleous, {C. H.} and P. Sherwood and Siroli, {G. P.} and A. Skuja and Smith, {A. M.} and Snow, {G. A.} and R. Sobie and S. S{\"o}ldner-Rembold and S. Spagnolo and M. Sproston and A. Stahl and K. Stephens and K. Stoll and D. Strom and R. Str{\"o}hmer and B. Surrow and Talbot, {S. D.} and S. Tarem and Taylor, {R. J.} and R. Teuscher and M. Thiergen and J. Thomas and Thomson, {M. A.} and E. Torrence and S. Towers and T. Trefzger and I. Trigger and Z. Tr{\'o}cs{\'a}nyi and E. Tsur and Turner-Watson, {M. F.} and I. Ueda and P. Vannerem and M. Verzocchi and H. Voss and J. Vossebeld and D. Waller and Ward, {C. P.} and Ward, {D. R.} and Watkins, {P. M.} and Watson, {A. T.} and Watson, {N. K.} and Wells, {P. S.} and T. Wengler and N. Wermes and D. Wetterling and White, {J. S.} and Wilson, {G. W.} and Wilson, {J. A.} and Wyatt, {T. R.} and S. Yamashita and V. Zacek and D. Zer-Zion",
year = "2001",
language = "English (US)",
volume = "18",
pages = "447--460",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer New York",
number = "3",

}

TY - JOUR

T1 - Production rates of bb̄ quark pairs from gluons and bb̄bb̄ events in hadronic Z0 decays

AU - Abbiendi, G.

AU - Ackerstaff, K.

AU - Ainsley, C.

AU - Akesson, P. F.

AU - Alexander, G.

AU - Allison, J.

AU - Anderson, K. J.

AU - Arcelli, S.

AU - Asai, S.

AU - Ashby, S. F.

AU - Axen, D.

AU - Azuelos, G.

AU - Bailey, I.

AU - Ball, A. H.

AU - Barberio, E.

AU - Barlow, R. J.

AU - Baumann, S.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bella, G.

AU - Bellerive, A.

AU - Bentvelsen, S.

AU - Bethke, S.

AU - Biebel, O.

AU - Bloodworth, I. J.

AU - Bock, P.

AU - Böhme, J.

AU - Boeriu, O.

AU - Bonacorsi, D.

AU - Boutemeur, M.

AU - Braibant, S.

AU - Bright-Thomas, P.

AU - Brigliadori, L.

AU - Brown, R. M.

AU - Burckhart, H. J.

AU - Cammin, J.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Ciocca, C.

AU - Clarke, P. E L

AU - Clay, E.

AU - Cohen, I.

AU - Cooke, O. C.

AU - Couchman, J.

AU - Couyoumtzelis, C.

AU - Coxe, R. L.

AU - Cuffiani, M.

AU - Dado, S.

AU - Dallavalle, G. M.

AU - Dallison, S.

AU - de Roeck, A.

AU - Dervan, P.

AU - Desch, K.

AU - Dienes, B.

AU - Dixit, M. S.

AU - Donkers, M.

AU - Dubbert, J.

AU - Duchovni, E.

AU - Duckeck, G.

AU - Duerdoth, I. P.

AU - Estabrooks, P. G.

AU - Etzion, E.

AU - Fabbri, F.

AU - Fanti, M.

AU - Feld, L.

AU - Ferrari, P.

AU - Fiedler, F.

AU - Fleck, I.

AU - Ford, M.

AU - Frey, A.

AU - Förtjes, A.

AU - Futyan, D. I.

AU - Gagnon, P.

AU - Gary, J. W.

AU - Gaycken, G.

AU - Geich-Gimbel, C.

AU - Giacomelli, G.

AU - Giacomelli, P.

AU - Glenzinski, D.

AU - Goldberg, J.

AU - Grandi, C.

AU - Graham, K.

AU - Gross, E.

AU - Grunhaus, J.

AU - Gruwé, M.

AU - Gönther, P. O.

AU - Hajdu, C.

AU - Hanson, G. G.

AU - Hansroul, M.

AU - Hapke, M.

AU - Harder, K.

AU - Harel, A.

AU - Hargrove, C. K.

AU - Harin-Dirac, M.

AU - Hauke, A.

AU - Hauschild, M.

AU - Hawkes, C. M.

AU - Hawkings, R.

AU - Hemingway, R. J.

AU - Hensel, C.

AU - Herten, G.

AU - Heuer, R. D.

AU - Hildreth, M. D.

AU - Hill, J. C.

AU - Hocker, A.

AU - Hoffman, K.

AU - Homer, R. J.

AU - Honma, A. K.

AU - Horváth, D.

AU - Hossain, K. R.

AU - Howard, R.

AU - Hüntemeyer, P.

AU - Igo-Kemenes, P.

AU - Ishii, K.

AU - Jacob, F. R.

AU - Jawahery, A.

AU - Jeremie, H.

AU - Jones, C. R.

AU - Jovanovic, P.

AU - Junk, T. R.

AU - Kanaya, N.

AU - Kanzaki, J.

AU - Karapetian, G.

AU - Karlen, D.

AU - Kartvelishvili, V.

AU - Kawagoe, K.

AU - Kawamoto, T.

AU - Keeler, R. K.

AU - Kellogg, R. G.

AU - Kennedy, B. W.

AU - Kim, D. H.

AU - Klein, K.

AU - Klier, A.

AU - Kobayashi, T.

AU - Kobel, M.

AU - Kokott, T. P.

AU - Komamiya, S.

AU - Kowalewski, R. V.

AU - Kress, T.

AU - Krieger, P.

AU - von Krogh, J.

AU - Kuhl, T.

AU - Kupper, M.

AU - Kyberd, P.

AU - Lafferty, G. D.

AU - Landsman, H.

AU - Lanske, D.

AU - Lawson, I.

AU - Layter, J. G.

AU - Leins, A.

AU - Lellouch, D.

AU - Letts, J.

AU - Levinson, L.

AU - Liebisch, R.

AU - Lillich, J.

AU - List, B.

AU - Littlewood, C.

AU - Lloyd, A. W.

AU - Lloyd, S. L.

AU - Loebinger, F. K.

AU - Long, G. D.

AU - Losty, M. J.

AU - Lu, J.

AU - Ludwig, J.

AU - Macchiolo, A.

AU - Macpherson, A.

AU - Mader, W.

AU - Mannelli, M.

AU - Marcellini, S.

AU - Marchant, T. E.

AU - Martin, A. J.

AU - Martin, J. P.

AU - Martinez, G.

AU - Mashimo, T.

AU - Mättig, P.

AU - McDonald, W. J.

AU - McKenna, J.

AU - McMahon, T. J.

AU - McPherson, R. A.

AU - Meijers, F.

AU - Mendez-Lorenzo, P.

AU - Merritt, F. S.

AU - Mes, H.

AU - Michelini, A.

AU - Mihara, S.

AU - Mikenberg, G.

AU - Miller, D. J.

AU - Mohr, W.

AU - Montanari, A.

AU - Mori, T.

AU - Nagai, K.

AU - Nakamura, I.

AU - Neal, H. A.

AU - Nisius, R.

AU - O'Neale, S. W.

AU - Oakham, F. G.

AU - Odorici, F.

AU - Ogren, H. O.

AU - Oh, A.

AU - Okpara, A.

AU - Oreglia, M. J.

AU - Orito, S.

AU - Pásztor, G.

AU - Pater, J. R.

AU - Patrick, G. N.

AU - Patt, J.

AU - Pfeifenschneider, P.

AU - Pilcher, J. E.

AU - Pinfold, J.

AU - Plane, D. E.

AU - Poli, B.

AU - Polok, J.

AU - Pooth, O.

AU - Przybycień, M.

AU - Quadt, A.

AU - Rembser, C.

AU - Rick, H.

AU - Robins, S. A.

AU - Rodning, N.

AU - Roney, J. M.

AU - Rosati, S.

AU - Roscoe, K.

AU - Rossi, A. M.

AU - Rozen, Y.

AU - Runge, K.

AU - Runolfsson, O.

AU - Rust, D. R.

AU - Sachs, K.

AU - Saeki, T.

AU - Sahr, O.

AU - Sarkisyan, E. K G

AU - Sbarra, C.

AU - Schaile, A. D.

AU - Schaile, O.

AU - Scharff-Hansen, P.

AU - Schmitt, S.

AU - Schröder, M.

AU - Schumacher, M.

AU - Schwick, C.

AU - Scott, W. G.

AU - Seuster, R.

AU - Shears, T. G.

AU - Shen, B. C.

AU - Shepherd-Themistocleous, C. H.

AU - Sherwood, P.

AU - Siroli, G. P.

AU - Skuja, A.

AU - Smith, A. M.

AU - Snow, G. A.

AU - Sobie, R.

AU - Söldner-Rembold, S.

AU - Spagnolo, S.

AU - Sproston, M.

AU - Stahl, A.

AU - Stephens, K.

AU - Stoll, K.

AU - Strom, D.

AU - Ströhmer, R.

AU - Surrow, B.

AU - Talbot, S. D.

AU - Tarem, S.

AU - Taylor, R. J.

AU - Teuscher, R.

AU - Thiergen, M.

AU - Thomas, J.

AU - Thomson, M. A.

AU - Torrence, E.

AU - Towers, S.

AU - Trefzger, T.

AU - Trigger, I.

AU - Trócsányi, Z.

AU - Tsur, E.

AU - Turner-Watson, M. F.

AU - Ueda, I.

AU - Vannerem, P.

AU - Verzocchi, M.

AU - Voss, H.

AU - Vossebeld, J.

AU - Waller, D.

AU - Ward, C. P.

AU - Ward, D. R.

AU - Watkins, P. M.

AU - Watson, A. T.

AU - Watson, N. K.

AU - Wells, P. S.

AU - Wengler, T.

AU - Wermes, N.

AU - Wetterling, D.

AU - White, J. S.

AU - Wilson, G. W.

AU - Wilson, J. A.

AU - Wyatt, T. R.

AU - Yamashita, S.

AU - Zacek, V.

AU - Zer-Zion, D.

PY - 2001

Y1 - 2001

N2 - The rates are measured per hadronic Z0 decay for gluon splitting to bb̄ quark pairs, gbb̄, and of events containing two bb̄ quark pairs, g4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb̄ quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two bb̄ quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of gbb̄ and g4b, namely gbb̄ = (3.07 ± 0.53(stat) ± 0.97(syst)) × 10-3, g4b = (0.36 ± 0.17(stat) ± 0.27(syst)) × 10-3.

AB - The rates are measured per hadronic Z0 decay for gluon splitting to bb̄ quark pairs, gbb̄, and of events containing two bb̄ quark pairs, g4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb̄ quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two bb̄ quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of gbb̄ and g4b, namely gbb̄ = (3.07 ± 0.53(stat) ± 0.97(syst)) × 10-3, g4b = (0.36 ± 0.17(stat) ± 0.27(syst)) × 10-3.

UR - http://www.scopus.com/inward/record.url?scp=0012068065&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0012068065&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0012068065

VL - 18

SP - 447

EP - 460

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 3

ER -