학술논문

Measurement of the partial width of theZ0 intob  $$\bar b$$ final states using
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Article
Author
Abreu, P.Adam, W.Adye, T.Agasi, E.Alekseev, G. D.Allen, P.Almehed, S.Alvsvaag, S. J.Amaldi, U.Anassontzis, E. G.Andreazza, A.Antilogus, P.Apel, W. -D.Apsimon, R. J.Åsman, B.Augustin, J. -E.Augustinus, A.Baillon, P.Bambade, P.Barao, F.Barate, R.Barbiellini, G.Bardin, D. Y.Baroncelli, A.Barring, O.Barrio, J. A.Bartl, W.Bates, M. J.Battaglia, M.Baubillier, M.Becks, K. -H.Beeston, C. J.Begalli, M.Beilliere, P.Belokopytov, Yu.Beltran, P.Benedic, D.Berggren, M.Bertrand, D.Bianchi, F.Bilenky, M. S.Billoir, P.Bjarne, J.Bloch, D.Blyth, S.Bocci, V.Bogolubov, P. N.Bolognese, T.Bonesini, M.Bonivento, W.Booth, P. S. L.Borgeaud, P.Borisov, G.Borner, H.Bosio, C.Bostjancic, B.Bosworth, S.Botner, O.Bouquet, B.Bourdarios, C.Bowcock, T. J. v.Bozzo, M.Braibant, S.Branchini, P.Brand, K. D.Brenner, R. A.Briand, H.Bricman, C.Brown, R. C. A.Brummer, N.Brunet, J. -M.Bugge, L.Buran, T.Burmeister, H.Buytaert, J. A. M. A.Caccia, M.Calvi, M.Camacho Rozas, A. J.Camporesi, T.Canale, V.Cao, F.Carena, F.Carroll, L.Caso, C.Castelli, E.Castillo Gimenez, M. V.Cattai, A.Cavallo, F. R.Cerrito, L.Chabaud, V.Chan, A.Charpentier, Ph.Chaussard, L.Chauveau, J.Checchia, P.Chelkov, G. A.Chevalier, L.Chliapnikov, P.Chorowicz, V.Chrin, J. T. M.Cirio, R.Clara, M. P.Collins, P.Contreras, J. L.Contri, R.Cortina, E.Cosme, G.Couchot, F.Crawley, H. B.Crennell, D.Crossetti, G.Crozon, M.Cuevas Maestro, J.Czellar, S.Dagoret, S.Dahl-Jensen, E.Dalmagne, B.Dam, M.Damgaard, G.Darbo, G.Daubie, E.Daum, A.Dauncey, P. D.Davenport, M.David, P.Da Silva, W.Defoix, C.Delikaris, D.Della Riccia, B. A.Delorme, S.Delpierre, P.Demaria, N.De Angelis, A.De Beer, M.De Boeck, H.De Boer, W.De Clercq, C.De Fez Laso, M. D. M.De Groot, N.De La Vaissiere, C.De Lotto, B.De Min, A.Dijkstra, H.Di Ciaccio, L.Djama, F.Dolbeau, J.Donszelmann, M.Doroba, K.Dracos, M.Drees, J.Dris, M.Dufour, Y.Eek, L. -O.Eerola, P. A. -M.Ehret, R.Ekelof, T.Ekspong, G.Elliot Peisert, A.Engel, J. -P.Fassouliotis, D.Fearnley, T. A.Feindt, M.Fenyuk, A.Fernandez Alonso, M.Ferrer, A.Filippas, T. A.Firestone, A.Foeth, H.Fokitis, E.Fontanelli, F.Forbes, K. A. J.Franek, B.Frenkiel, P.Fries, D. C.Frodesen, A. G.Fruhwirth, R.Fulda-Quenzer, F.Furnival, K.Furstenau, H.Fuster, J.Galeazzi, G.Gamba, D.Garcia, C.Garcia, J.Gaspar, C.Gasparini, U.Gavillet, Ph.Gazis, E. N.Gerber, J. -P.Giacomelli, P.Gokieli, R.Golob, B.Golovatyuk, V. M.Gomez Y Cadenas, J. J.Goobar, A.Gopal, G.Gorski, M.Gracco, V.Grant, A.Grard, F.Graziani, E.Grosdidier, G.Gross, E.Grosse-Wiesmann, P.Grossetete, B.Gumenyuk, S.Guy, J.Haedinger, U.Hahn, F.Hahn, M.Haider, S.Hajduk, Z.Hakansson, A.Hallgren, A.Hamacher, K.Hamel De Monchenault, G.Hao, W.Harris, F. J.Henkes, T.Hernandez, J. J.Herquet, P.Herr, H.Hessing, T. L.Hietanen, I.Higgins, C. O.Higon, E.Hilke, H. J.Hodgson, S. D.Hofmokl, T.Holmes, R.Holmgren, S. -O.Holthuizen, D.Honore, P. F.Hooper, J. E.Houlden, M.Hrubec, J.Hulth, P. O.Hultqvist, K.Ioannou, P.Isenhower, D.Iversen, P. -S.Jackson, J. N.Jalocha, P.Jarlskog, G.Jarry, P.Jean-Marie, B.Johansson, E. K.Johnson, D.Jonker, M.Jonsson, L.Juillot, P.Kalkanis, G.Kalmus, G.Kapusta, F.Karlsson, M.Karvelas, E.Katsanevas, S.Katsoufis, E. C.Keranen, R.Kesteman, J.Khomenko, B. A.Khovanski, N. N.King, B.Kjaer, N. J.Klein, H.Klempt, W.Klovning, A.Kluit, P.Koch-Mehrin, A.Koehne, J. H.Koene, B.Kokkinias, P.Kopf, M.Korcyl, K.Korytov, A. V.Kostioukhine, V.Kourkoumelis, C.Kouznetsov, O.Kramer, P. H.Krolikowski, J.Kronkvist, I.Krstic, J.Kruener-Marquis, U.Krupinski, W.Kulka, K.Kurvinen, K.Lacasta, C.Lambropoulos, C.Lamsa, J. W.Lanceri, L.Lapin, V.Laugier, J. -P.Lauhakangas, R.Leder, G.Ledroit, F.Leitner, R.Lemoigne, Y.Lemonne, J.Lenzen, G.Lepeltier, V.Levy, J. M.Lieb, E.Liko, D.Lillethun, E.Lindgren, J.Lindner, R.Lipniacka, A.Lippi, I.Loerstad, B.Lokajicek, M.Loken, J. G.Lopez-Fernandez, A.Lopez Aguera, M. A.Los, M.Loukas, D.Lozano, J. J.Lutz, P.Lyons, L.Maehlum, G.Maillard, J.Maltezos, A.Mandl, F.Marco, J.Margoni, M.Marin, J. -C.Markou, A.Maron, T.Marti, S.Mathis, L.Matorras, F.Matteuzzi, C.Matthiae, C.Mazzucato, M.Mc Cubbin, M.Mc Kay, R.Mc Nulty, R.Meola, G.Meroni, C.Meyer, W. T.Michelotto, M.Mikulec, I.Mitaroff, W. A.Mitselmakher, G. V.Mjoernmark, U.Moa, T.Moeller, R.Moenig, K.Monge, M. R.Morettini, P.Mueller, H.Murray, W. J.Muryn, B.Myatt, G.Naraghi, F.Navarria, F. L.Negri, P.Nielsen, B. S.Nijjhar, B.Nikolaenko, V.Nilsen, P. E. S.Niss, P.Obraztsov, V.Olshevski, A. G.Orava, R.Ostankov, A.Osterberg, K.Ouraou, A.Paganoni, M.Pain, R.Palka, H.Papadopoulou, Th. D.Pape, L.Passeri, A.Pegoraro, M.Pennanen, J.Perevozchikov, V.Pernicka, M.Perrotta, A.Petrolini, A.Pettersen, T. E.Pierre, F.Pimenta, M.Pingot, O.Pol, M. E.Polok, G.Poropat, P.Privitera, P.Pullia, A.Radijicic, D.Ragazzi, S.Ratoff, P. N.Read, A. L.Redaelli, N. G.Regler, M.Reid, D.Renton, P. B.Resvanis, L. K.Richard, F.Richardson, M.Ridky, J.Rinaudo, G.Roditi, I.Romero, A.Roncagliolo, I.Ronchese, P.Ronnqvist, C.Rosenberg, E. I.Rossi, S.Rossi, U.Rosso, E.Roudeau, P.Rovelli, T.Ruckstuhl, W.Ruhlmann, V.Ruiz, A.Rybicki, K.Saarikko, H.Sacquin, Y.Sajot, G.Salt, J.Sanchez, J.Sannino, M.Schael, S.Schneider, H.Schyns, M. A. E.Sciolla, G.Scuri, F.Segar, A. M.Sekulin, R.Sessa, M.Sette, G.Seufert, R.Shellard, R. C.Siccama, I.Siegrist, P.Simonetti, S.Simonetto, F.Sisakian, A. N.Skaali, T. B.Skjevling, G.Smadja, G.Smith, G. R.Sosnowski, R.Spassoff, T. S.Spiriti, E.Squarcia, S.Staeck, H.Stanescu, C.Stapnes, S.Stavropoulos, G.Stichelbaut, F.Stocchi, A.Strauss, J.Straver, J.Strub, R.Szczekowski, M.Szeptycka, M.Szymanski, P.Tabarelli, T.Tavernier, S.Tchikilev, O.Theodosiou, G. E.Tilquin, A.Timmermans, J.Timofeev, V. G.Tkatchev, L. G.Todorov, T.Toet, D. Z.Toker, O.Torassa, E.Tortora, L.Trainor, M. T.Treille, D.Trevisan, U.Trischuk, W.Tristram, G.Troncon, C.Tsirou, A.Tsyganov, E. N.Turala, M.Turluer, M. -L.Tuuva, T.Tyapkin, I. A.Tyndel, M.Tzamarias, S.Ueberschaer, S.Ullaland, O.Uvarov, V.Valenti, G.Vallazza, E.Valls Ferrer, J. A.Vander Velde, C.Van Apeldoorn, G. W.Van Dam, P.Van Doninck, W. K.Varela, J.Vaz, P.Vegni, G.Ventura, L.Venus, W.Verbeure, F.Vertogradov, L. S.Vilanova, D.Vitale, L.Vlasov, E.Vodopyanov, A. S.Vollmer, M.Volponi, S.Voulgaris, G.Voutilainen, M.Vrba, V.Wahlen, H.Walck, C.Waldner, F.Wayne, M.Wehr, A.Weierstall, M.Weilhammer, P.Werner, J.Wetherell, A. M.Wickens, J. H.Wikne, J.Wilkinson, G. R.Williams, W. S. C.Winter, M.Wormald, D.Woschnagg, K.Yamdagni, N.Yepes, P.Zaitsev, A.Zalewska, A.Zalewski, P.Zavrtanik, D.Zevgolatakos, E.Zhang, G.Zimin, N. I.Zito, M.Zuberi, R.Zukanovich Funchal, R.Zumerle, G.Zuniga, J.
Source
Zeitschrift für Physik C Particles and Fields; March 1992, Vol. 56 Issue: 1 p47-61, 15p
Subject
Language
ISSN
01709739; 14315858
Abstract
The spectra of prompt electrons and muons from the semi-leptonic decays of heavy hadrons produced inZ0 decays have been used to measure the coupling of theZ0 tob quarks weighted by theB hadrons mean semi-leptonic branching fraction, giving a value:  $$BR_{sl}^b *{{\Gamma _{b\bar b} } \mathord{\left/ {\vphantom {{\Gamma _{b\bar b} } {\Gamma _H }}} \right. \kern-\nulldelimiterspace} {\Gamma _H }} = 0.0221 \pm 0.0015$$ . The data has also been used to measure the value of the fragmentation parameter, defined in the context of the LUND PS Model, version 7.2, giving:  $$\varepsilon (b) = \left( {8\begin{array}{*{20}c} { + 5} \\ { - 3} \\ \end{array} \pm 2} \right)10^{ - 3} $$ . The corresponding value of the mean fraction of the beam energy taken by aB hadron in the fragmentation of ab quark is:  $$\overline {X_E^b } = 0.69\begin{array}{*{20}c} { + 0.02} \\ { - 0.03} \\ \end{array} \pm 0.01$$ . If the values of  $$\Gamma _{b\bar b} $$ andΓH are taken from the Standard Model, the following value is obtained for the mean semi-leptonic braching fraction ofB hadrons: BRslb=(10.1±0.7)%. Taking the value of  $${{\Gamma _{b\bar b} } \mathord{\left/ {\vphantom {{\Gamma _{b\bar b} } {\Gamma _{\rm H} }}} \right. \kern-\nulldelimiterspace} {\Gamma _{\rm H} }}$$ from an independent analysis of DELPHI data based on the use of the boosted sphericity product, a value: BRslb=(10.1±1.3)% is obtained.