Production rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decays

The rates are measured per hadronic Z decay for gluon splitting to bb(bar) quark pairs, g_bb, and of events containing two bb(bar) quark pairs, g_4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb(bar) qu...

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Detalles Bibliográficos
Autores principales: Abbiendi, G., Ackerstaff, K., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Anderson, K.J., Arcelli, S., Asai, S., Ashby, S.F., Axen, D., Azuelos, G., Bailey, I., Ball, A.H., Barberio, E., Barlow, Roger J., Baumann, S., Behnke, T., Bell, Kenneth Watson, Bella, G., Bellerive, A., Bentvelsen, S., Bethke, S., Biebel, O., Bloodworth, I.J., Bock, P., Bohme, J., Boeriu, O., Bonacorsi, D., Boutemeur, M., Braibant, S., Bright-Thomas, P., Brigliadori, L., Brown, Robert M., Burckhart, H.J., Cammin, J., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David 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.Marco, 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., Furtjes, 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., Gruwe, M., Gunther, 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, James Andrew, Hoffman, Kara Dion, Homer, R.J., Honma, A.K., Horvath, D., Hossain, K.R., Howard, R., Huntemeyer, 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, Robert 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., Mattig, Peter, McDonald, W.John, 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., Pasztor, G., Pater, J.R., Patrick, G.N., Patt, J., Pfeifenschneider, P., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, 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., Schroder, Matthias, 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., Soldner-Rembold, S., Spagnolo, S., Sproston, M., Stahl, A., Stephens, K., Stoll, K., Strom, David M., Strohmer, 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., Trocsanyi, 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.
Lenguaje:eng
Publicado: 2000
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1007/s100520100580
http://cds.cern.ch/record/468615
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author Abbiendi, G.
Ackerstaff, K.
Ainsley, C.
Akesson, P.F.
Alexander, G.
Allison, John
Anderson, K.J.
Arcelli, S.
Asai, S.
Ashby, S.F.
Axen, D.
Azuelos, G.
Bailey, I.
Ball, A.H.
Barberio, E.
Barlow, Roger J.
Baumann, S.
Behnke, T.
Bell, Kenneth Watson
Bella, G.
Bellerive, A.
Bentvelsen, S.
Bethke, S.
Biebel, O.
Bloodworth, I.J.
Bock, P.
Bohme, J.
Boeriu, O.
Bonacorsi, D.
Boutemeur, M.
Braibant, S.
Bright-Thomas, P.
Brigliadori, L.
Brown, Robert M.
Burckhart, H.J.
Cammin, J.
Capiluppi, P.
Carnegie, R.K.
Carter, A.A.
Carter, J.R.
Chang, C.Y.
Charlton, David 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.Marco
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.
Furtjes, 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.
Gruwe, M.
Gunther, 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, James Andrew
Hoffman, Kara Dion
Homer, R.J.
Honma, A.K.
Horvath, D.
Hossain, K.R.
Howard, R.
Huntemeyer, 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, Robert 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.
Mattig, Peter
McDonald, W.John
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.
Pasztor, G.
Pater, J.R.
Patrick, G.N.
Patt, J.
Pfeifenschneider, P.
Pilcher, J.E.
Pinfold, J.
Plane, David E.
Poli, B.
Polok, J.
Pooth, O.
Przybycien, 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.
Schroder, Matthias
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.
Soldner-Rembold, S.
Spagnolo, S.
Sproston, M.
Stahl, A.
Stephens, K.
Stoll, K.
Strom, David M.
Strohmer, 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.
Trocsanyi, 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.
author_facet Abbiendi, G.
Ackerstaff, K.
Ainsley, C.
Akesson, P.F.
Alexander, G.
Allison, John
Anderson, K.J.
Arcelli, S.
Asai, S.
Ashby, S.F.
Axen, D.
Azuelos, G.
Bailey, I.
Ball, A.H.
Barberio, E.
Barlow, Roger J.
Baumann, S.
Behnke, T.
Bell, Kenneth Watson
Bella, G.
Bellerive, A.
Bentvelsen, S.
Bethke, S.
Biebel, O.
Bloodworth, I.J.
Bock, P.
Bohme, J.
Boeriu, O.
Bonacorsi, D.
Boutemeur, M.
Braibant, S.
Bright-Thomas, P.
Brigliadori, L.
Brown, Robert M.
Burckhart, H.J.
Cammin, J.
Capiluppi, P.
Carnegie, R.K.
Carter, A.A.
Carter, J.R.
Chang, C.Y.
Charlton, David 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.Marco
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.
Furtjes, 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.
Gruwe, M.
Gunther, 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, James Andrew
Hoffman, Kara Dion
Homer, R.J.
Honma, A.K.
Horvath, D.
Hossain, K.R.
Howard, R.
Huntemeyer, 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, Robert 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.
Mattig, Peter
McDonald, W.John
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.
Pasztor, G.
Pater, J.R.
Patrick, G.N.
Patt, J.
Pfeifenschneider, P.
Pilcher, J.E.
Pinfold, J.
Plane, David E.
Poli, B.
Polok, J.
Pooth, O.
Przybycien, 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.
Schroder, Matthias
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.
Soldner-Rembold, S.
Spagnolo, S.
Sproston, M.
Stahl, A.
Stephens, K.
Stoll, K.
Strom, David M.
Strohmer, 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.
Trocsanyi, 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.
author_sort Abbiendi, G.
collection CERN
description The rates are measured per hadronic Z decay for gluon splitting to bb(bar) quark pairs, g_bb, and of events containing two bb(bar) quark pairs, g_4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb(bar) quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two bb(bar) 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 g_bb and g_4b, namely g_bb = (3.07 +- 0.53(stat) +- 0.97(syst))x10^-3 g_4b = (0.36 +- 0.17(stat) +- 0.27(syst))x10^-3
id cern-468615
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2000
record_format invenio
spelling cern-4686152021-10-29T02:30:15Zdoi:10.1007/s100520100580http://cds.cern.ch/record/468615engAbbiendi, G.Ackerstaff, K.Ainsley, C.Akesson, P.F.Alexander, G.Allison, JohnAnderson, K.J.Arcelli, S.Asai, S.Ashby, S.F.Axen, D.Azuelos, G.Bailey, I.Ball, A.H.Barberio, E.Barlow, Roger J.Baumann, S.Behnke, T.Bell, Kenneth WatsonBella, G.Bellerive, A.Bentvelsen, S.Bethke, S.Biebel, O.Bloodworth, I.J.Bock, P.Bohme, J.Boeriu, O.Bonacorsi, D.Boutemeur, M.Braibant, S.Bright-Thomas, P.Brigliadori, L.Brown, Robert M.Burckhart, H.J.Cammin, J.Capiluppi, P.Carnegie, R.K.Carter, A.A.Carter, J.R.Chang, C.Y.Charlton, David 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.MarcoDallison, 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.Furtjes, 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.Gruwe, M.Gunther, 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, James AndrewHoffman, Kara DionHomer, R.J.Honma, A.K.Horvath, D.Hossain, K.R.Howard, R.Huntemeyer, 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, Robert 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.Mattig, PeterMcDonald, W.JohnMcKenna, 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.Pasztor, G.Pater, J.R.Patrick, G.N.Patt, J.Pfeifenschneider, P.Pilcher, J.E.Pinfold, J.Plane, David E.Poli, B.Polok, J.Pooth, O.Przybycien, 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.Schroder, MatthiasSchumacher, 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.Soldner-Rembold, S.Spagnolo, S.Sproston, M.Stahl, A.Stephens, K.Stoll, K.Strom, David M.Strohmer, 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.Trocsanyi, 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 rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decaysParticle Physics - ExperimentThe rates are measured per hadronic Z decay for gluon splitting to bb(bar) quark pairs, g_bb, and of events containing two bb(bar) quark pairs, g_4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb(bar) quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two bb(bar) 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 g_bb and g_4b, namely g_bb = (3.07 +- 0.53(stat) +- 0.97(syst))x10^-3 g_4b = (0.36 +- 0.17(stat) +- 0.27(syst))x10^-3The rates are measured per hadronic Z decay for gluon splitting to bb(bar) quark pairs, g_bb, and of events containing two bb(bar) quark pairs, g_4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb(bar) quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two bb(bar) 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 g_bb and g_4b, namely g_bb = (3.07 +- 0.53(stat) +- 0.97(syst))x10^-3 g_4b = (0.36 +- 0.17(stat) +- 0.27(syst))x10^-3hep-ex/0010029CERN-EP-2000-123CERN-EP-2000-123oai:cds.cern.ch:4686152000-10-13
spellingShingle Particle Physics - Experiment
Abbiendi, G.
Ackerstaff, K.
Ainsley, C.
Akesson, P.F.
Alexander, G.
Allison, John
Anderson, K.J.
Arcelli, S.
Asai, S.
Ashby, S.F.
Axen, D.
Azuelos, G.
Bailey, I.
Ball, A.H.
Barberio, E.
Barlow, Roger J.
Baumann, S.
Behnke, T.
Bell, Kenneth Watson
Bella, G.
Bellerive, A.
Bentvelsen, S.
Bethke, S.
Biebel, O.
Bloodworth, I.J.
Bock, P.
Bohme, J.
Boeriu, O.
Bonacorsi, D.
Boutemeur, M.
Braibant, S.
Bright-Thomas, P.
Brigliadori, L.
Brown, Robert M.
Burckhart, H.J.
Cammin, J.
Capiluppi, P.
Carnegie, R.K.
Carter, A.A.
Carter, J.R.
Chang, C.Y.
Charlton, David 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.Marco
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.
Furtjes, 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.
Gruwe, M.
Gunther, 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, James Andrew
Hoffman, Kara Dion
Homer, R.J.
Honma, A.K.
Horvath, D.
Hossain, K.R.
Howard, R.
Huntemeyer, 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, Robert 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.
Mattig, Peter
McDonald, W.John
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.
Pasztor, G.
Pater, J.R.
Patrick, G.N.
Patt, J.
Pfeifenschneider, P.
Pilcher, J.E.
Pinfold, J.
Plane, David E.
Poli, B.
Polok, J.
Pooth, O.
Przybycien, 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.
Schroder, Matthias
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.
Soldner-Rembold, S.
Spagnolo, S.
Sproston, M.
Stahl, A.
Stephens, K.
Stoll, K.
Strom, David M.
Strohmer, 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.
Trocsanyi, 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 rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decays
title Production rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decays
title_full Production rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decays
title_fullStr Production rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decays
title_full_unstemmed Production rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decays
title_short Production rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decays
title_sort production rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic z decays
topic Particle Physics - Experiment
url https://dx.doi.org/10.1007/s100520100580
http://cds.cern.ch/record/468615
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AT hauschildm productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT hawkescm productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT kyberdp productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT lansked productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT marchantte productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT martinjp productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT miharas productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT mikenbergg productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT millerdj productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT mohrw productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT montanaria productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT nakamurai productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT ogrenho productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT pinfoldj productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT planedavide productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT pootho productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT rodningn productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT roneyjm productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT rosatis productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT schaileo productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT shepherdthemistocleousch productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT stollk productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT stromdavidm productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT warddr productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT watkinspm productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT wilsongw productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
AT wilsonja productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays
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AT zerziond productionrateofboverlinebquarkpairsfromgluonsandboverlinebboverlinebeventsinhadroniczdecays

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