학술논문

Measurement of the average lifetime ofB hadrons
Document Type
Article
Author
Abreu, P.Adam, W.Adami, F.Adye, T.Akesson, T.Alekseev, G. D.Allen, P.Almehed, S.Alvsvaag, S. J.Amaldi, U.Anassontzis, E.Antilogus, P.Apel, W-D.Apsimon, R. J.Åsman, B.Astier, P.Augustin, J-E.Augustinus, A.Baillon, P.Bambade, P.Barao, F.Barate, R.Barbiellini, G.Bardin, D. Y.Baroncelli, A.Barring, O.Bartl, W.Bates, M. J.Bataglia, M.Baubillier, M.Becks, K-H.Beeston, C. J.Begalli, M.Beilliere, P.Belokopytov, Yu.Beltran, P.Benedic, D.Benlloch, J. M.Berggren, M.Bertrand, D.Bianchi, F.Bilenky, M. S.Billoir, P.Bjarne, J.Bloch, D.Blyth, S.Bocci, V.Bogolubov, P. N.Bolognese, T.Bonapart, M.Bonesini, M.Bonivento, W.Booth, P. S. L.Boratav, M.Borgeaud, P.Borisov, G.Borner, H.Bosio, C.Bostjancic, B.Botner, O.Bouquet, B.Bozzo, M.Braibant, S.Branchini, P.Brand, K. D.Brenner, R. A.Bricman, C.Brown, R. C. A.Brummer, N.Brunet, J-M.Bugge, L.Burran, T.Burmeister, H.Buytaert, J. A. M. A.Caccia, M.Calvi, M.Camacho Rozas, A. J.Campion, A.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.Chan, A.Charpentier, P.Checchia, P.Chelkov, G. A.Chevalier, L.Chliapnikov, M.Chorowicz, V.Cirio, R.Clara, M. P.Collins, P.Contreras, J. L.Contri, R.Cosme, G.Couchot, F.Crawley, H. B.Crennell, D.Crosetti, G.Crozon, M.Cuevas Maestro, J.Czellar, S.Dagoret, S.Dahl-Jensen, E.Dalmagne, B.Dam, M.Damgaard, G.Darbo, G.Daubie, E.Dayncey, P. D.Davenport, M.David, P.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 Vaissiere, C.De Lotto, B.De Min, A.Defoix, C.Delikaris, D.Delorme, S.Delpierre, P.Demaria, N.DiCiaccio, L.Dijkstra, H.Djama, F.Dolbeau, J.Doll, O.Donszelmann, M.Doraba, K.Dracos, M.Drees, J.Dris, M.Dufour, Y.Dulinski, W.Eek, L-O.Eerola, P. A. -M.Ekelof, T.Ekspong, G.Elliot Peisert, A.Engel, J-P.Fassouliotis, D.Feindt, M.Fenyuk, A.Fernandez Alonso, M.Ferrer, A.Filippas, T. A.Firestone, A.Foeth, H.Fokitis, E.Folegati, P.Fontanelli, F.Forbes, K. A. J.Forsbach, H.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, P.Gazis, E. N.Gerber, J-P.Giacomelli, P.Glitza, K-W.Gokieli, R.Golovatyuk, V. M.Gomez Y Cadenas, J. J.Goobar, A.Gopa, G.Gorski, M.Cracco, V.Grant, A.Grard, F.Graziani, E.Gros, M-H.Grosdidier, G.Gross, E.Grossetete, B.Grosse-Wiesmann, P.Guy, J.Hahn, F.Hahn, M.Haider, S.Hajduk, Z.Hakansson, A.Hallgren, A.Hamacher, K.Hamel De Monchenault, G.Harris, F. J.Heck, B. W.Henkes, T.Herbst, I.Hernandez, J. J.Herquet, P.Herr, H.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.Husson, D.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.Katsanevas, S.Katsoufis, E. C.Keranen, R.Kesteman, J.Khomenko, B. A.Khovanski, N. N.King, B.Kjaer, N. J.Klempt, W.Klovning, A.Kluit, P.Koch-Mehrin, A.Koehne, J. H.Koene, B.Kokkinas, P.Kopf, M.Koratzinos, M.Korcyl, K.Korytov, A. V.Kostukhin, V.Kourkoumelis, C.Kreuzberger, T.Krollkowski, J.Kronkvist, I.Krstic, J.Kruener-Marquis, U.Krupinski, W.Kucewicz, W.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.Letessier-Selvon, A.Liko, D.Lieb, E.Lillethun, E.Lindgren, J.Lipniacka, A.Lippi, I.Llosa, R.Loerstad, B.Lokajicek, M.Loken, J. G.Lopez Aguera, M. A.Lopez-Fernandez, A.Los, M.Loukas, D.Lounis, A.Lozano, J. J.Lucock, R.Lutz, P.Lyons, L.Maehlum, G.Magnussen, N.Maillard, J.Maltezos, A.Mandl, F.Marco, J.Margoni, M.Marin, J-C.Markou, A.Marti, S.Mathis, L.Matorras, F.Matteuzzi, C.Matthiae, G.Matveev, M.Mazzucato, M.McCubbin, M.McKay, R.McNulty, R.Menichetti, E.Meroni, C.Meyer, W. T.Michelotto, M.Mitaroff, W. A.Mitselmakher, G. V.Mjoernmark, U.Moa, T.Moeller, R.Moenig, K.Monge, M. R.Morettini, P.Mueller, H.Murray, W. J.Myatt, G.Naraghi, F.Nau-Korzen, U.Navarria, F. L.Negri, P.Nielsen, B. S.Nijjhar, B.Nikolaenko, V.Obraztsov, V.Olshevski, A. G.Orava, R.Ostankov, A.Ouraou, A.Paganoni, M.Pain, R.Palka, H.Papadopoulou, T.Pape, L.Passeri, A.Pegoraro, M.Perevozchikov, V.Pernicka, M.Perrotta, A.Pierre, F.Pimenta, M.Pingot, O.Pol, M. E.Polok, G.Poropat, P.Privitera, P.Pullia, A.Pyyhtia, J.Radojicic, 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, U.Rosso, E.Roudeau, P.Rovelli, T.Ruckstuhl, W.Ruhlmann, V.Ruiz, A.Rybicki, K.Saarikko, H.Sacquin, Y.Sajot, G.Salt, J.Sanchez, E.Sanchez, J.Sannino, M.Schaeffer, M.Schael, S.Schneider, H.Schyns, M. A. E.Scuri, F.Segar, A. M.Sekulin, R.Sessa, M.Sette, G.Seufert, R.Shellard, R. C.Siegrist, P.Simonetti, S.Simonetto, F.Sissakian, A. N.Skaali, T. B.Skievling, G.Smadja, G.Smirnov, N.Smith, G. R.Sosnowski, R.Spassoff, T. S.Spiriti, E.Squarcia, S.Staeck, H.Stanescu, C.Stavropoulos, G.Stichelbaut, F.Stocchi, A.Strauss, J.Strub, R.Szczekowski, M.Szeptycka, M.Szymanski, P.Tabarelli, T.Tavernier, S.Theodosiou, G.Tilquin, A.Timmermans, J.Timofeev, V. G.Tkatchev, L. G.Todorov, T.Toet, D. Z.Torassa, E.Tortora, L.Trainor, M. T.Treille, D.Trevisan, U.Trischuk, W.Tristram, G.Troncon, C.Tsirou, A.Tsyganov, E. N.Turala, M.Turchetta, R.Turluer, M-L.Tuuva, T.Tyapkin, I. A.Tyndel, M.Tzamarias, S.Ueberschaer, B.Ueberschaer, S.Ullaland, O.Urarov, V. A.Valenti, G.Vallazza, E.Valls Ferrer, J. A.Van Apeldoorn, G. W.Van Dam, P.Van Doninck, W. K.Vander Velde, C.Varela, J.Vaz, P.Vegni, G.Ventura, L.Venus, W.Verbeure, F.Vertogradov, L. S.Vibert, L.Vilanova, D.Vitale, L.Vlasov, E. V.Vlassopoulos, S.Vodopyanov, A. S.Vollmer, M.Volponi, S.Voulgaris, G.Voutilainen, M.Vrba, V.Wahlen, H.Walck, C.Waldner, F.Wayne, M.Weilhammer, P.Werner, J.Wetherell, A. M.Wickens, J. H.Wikne, J.Wilkinson, G. R.Williams, W. S. C.Winter, M.Wormald, D.Wormser, G.Woschnagg, K.Yamdagni, N.Yepes, P.Zaitsev, A.Zalewska, A.Zalewski, P.Zavrtanik, D.Zevgolatakos, E.Zhang, G.Zimin, N. I.Zito, M.Zitoun, R.Zukanovich Funchal, R.Zumerli, G.Zuniga, J.
Source
Zeitschrift für Physik C Particles and Fields; December 1992, Vol. 53 Issue: 4 p567-580, 14p
Subject
Language
ISSN
01709739; 14315858
Abstract
The average lifetime ofB hadrons produced in hadronicZ0 decays has been measured with the DELPHI detector at LEP. The measurement is based on the analysis of the impact parameter distributions of highpt muons and hadrons. The resulting meanB lifetimes are tB=(1.30±0.10±0.08)ps and tB=(1.27±0.04±0.12)ps respectively, giving a combined value of tB=(1.28±0.10)ps. The hadronic sample was also used to measure the partialZ0 width  $${{\Gamma _{b\bar b} } \mathord{\left/ {\vphantom {{\Gamma _{b\bar b} } {\Gamma _h }}} \right. \kern-\nulldelimiterspace} {\Gamma _h }}$$ and gave a value of 0.222-0.031+0.033±0.017.