Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar
Articolo
Data di Pubblicazione:
1999
Abstract:
The rate Z --> b (b) over bar b (b) over bar was measured using about 2 x 10(6) hadronic decays collected by the DELPHI experiment in 1994 and 1995. Events were forced into 3-jets with y(min) > 0.06 and a b-tag was required for every jet. The rate was measured to be: R-4b = BR(Z --> b (b) over bar b (b) over bar/BR(Z --> hadrons), = (6.0 +/- 1.9(stat.) +/- 1.4(syst.)) x 10(-4) where the invariant mass of every b (b) over bar system is above twice the b quark mass. Using the value of R-4b the probability of secondary production of a b (b) over bar pair from a gluon per hadronic Z decay, g(bb), was extracted and found to be: g(bb) = (3.3 +/- 1.0(stat.) +/- 0.8(syst.)) x 10(-3). (C) 1999 Published by Elsevier Science B.V. All rights reserved.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
P. Abreu;W. Adam;T. Adye;P. Adzic;I. Ajinenko;Z. Albrecht;T. Alderweireld;G. D. Alekseev;R. Alemany;T. Allmendinger;P. P. Allport;S. Almehed;U. Amaldi;N. Amapane;S. Amato;E. G. Anassontzis;P. Andersson;A. Andreazza;S. Andringa;P. Antilogus;W. D. Apel;Y. Arnoud;B. Asman;J. E. Augustin;A. Augustinus;P. Baillon;A. Ballestrero;P. Bambade;F. Barao;G. Barbiellini;R. Barbier;D. Y. Bardin;G. Barker;A. Baroncelli;M. Battaglia;M. Baubillier;K. H. Becks;M. Begalli;A. Behrmann;P. Beilliere;Y. Belokopytov;N. C. Benekos;A. C. Benvenuti;C. Berat;M. Berggren;D. Bertini;D. Bertrand;M. Besancon;M. Bigi;M. S. Bilensky;M. A. Bizouard;D. Bloch;H. M. Blom;M. Bonesini;W. Bonivento;M. Boonekamp;P. S. L.;A. W. Borgland;G. Borisov;C. Bosio;O. Botner;E. Boudinov;B. Bouquet;C. Bourdarios;T. J. V.;I. Boyko;I. Bozovic;M. Bozzo;P. Branchini;T. Brenke;R. A. Brenner;P. Bruckman;J. M. Brunet;L. Bugge;T. Buran;T. Burgsmueller;B. Buschbeck;P. Buschmann;S. Cabrera;M. Caccia;M. Calvi;T. Camporesi;V. Canale;F. Carena;L. Carroll;C. Caso;M. V. C.;A. Cattai;F. R. Cavallo;V. Chabaud;P. Charpentier;L. Chaussard;P. Checchia;G. A. Chelkov;R. Chierici;P. Chliapnikov;P. Chochula;V. Chorowicz;J. Chudoba;K. Cieslik;P. Collins;R. Contri;E. Cortina;G. Cosme;F. Cossutti;J. H. Cowell;H. B. Crawley;D. Crennell;S. Crepe;G. Crosetti;J. C. Maestro;S. Czellar;M. Davenport;W. D. Silva;A. Deghorain;G. D. Ricca;P. Delpierre;N. Demaria;A. D. Angelis;W. D. Boer;C. D. Clercq;B. D. Lotto;A. D. Min;L. D. Paula;H. Dijkstra;L. D. Ciaccio;J. Dolbeau;K. Doroba;M. Dracos;J. Drees;M. Dris;A. Duperrin;J. D. Durand;G. Eigen;T. Ekelof;G. Ekspong;M. Ellert;M. Elsing;J. P. Engel;B. Erzen;M. E. Santo;G. Fanourakis;D. Fassouliotis;J. Fayot;M. Feindt;P. Ferrari;A. Ferrer;E. Ferrer-Ribas;F. Ferro;S. Fichet;A. Firestone;U. Flagmeyer;H. Foeth;E. Fokitis;F. Fontanelli;B. Franek;A. G. Frodesen;R. Fruhwirth;F. Fulda-Quenzer;J. Fuster;A. Galloni;D. Gamba;S. Gamblin;M. Gandelman;C. Garcia;C. Gaspar;M. Gaspar;U. Gasparini;P. Gavillet;E. N. Gazis;D. Gele;L. Gerdyukov;N. Ghodbane;I. Gil;F. Glege;R. Gokieli;B. Golob;G. Gomez-Ceballos;P. Goncalves;I. G. Caballero;G. Gopal;L. Gorn;Y. Gouz;V. Gracco;J. Grahl;E. Graziani;C. Green;H. J. Grimm;P. Gris;G. Grosdidier;K. Grzelak;M. Gunther;J. Guy;F. Hahn;S. Hahn;S. Haider;A. Hallgren;K. Hamacher;J. Hansen;F. J. Harris;V. Hedberg;S. Heising;J. J. Hernandez;P. Herquet;H. Herr;T. L. Hessing;J. M. Heuser;E. Higon;S. O. Holmgren;P. J. Holt;S. Hoorelbeke;M. Houlden;J. Hrubec;K. Huet;G. J. Hughes;K. Hultqvist;J. N. Jackson;R. Jacobsson;P. Jalocha;R. Janik;C. Jarlskog;G. Jarlskog;P. Jarry;B. Jean-Marie;E. K. Johansson;P. Jonsson;C. Joram;P. Juillot;F. Kapusta;K. Karafasoulis;S. Katsanevas;E. C. Katsoufis;R. Keranen;B. P. Kersevan;B. A. Khomenko;N. N. Khovanski;A. Kiiskinen;B. King;A. Kinvig;N. J. Kjaer;O. Klapp;H. Klein;P. Kluit;P. Kokkinias;M. Koratzinos;V. Kostioukhine;C. Kourkoumelis;O. Kouznetsov;M. Krammer;E. Kriznic;J. Krstic;Z. Krumstein;P. Kubinec;J. Kurowska;K. Kurvinen;J. W. Lamsa;D. W. Lane;P. Langefeld;V. Lapin;J. P. Laugier;R. Lauhakangas;G. Leder;F. Ledroit;V. Lefebure;L. Leinonen;A. Leisos;R. Leitner;J. Lemonne;G. Lenzen;V. Lepeltier;T. Lesiak;M. Lethuillier;J. Libby;D. Liko;A. Lipniacka;I. Lippi;B. Loerstad;J. G. Loken;J. H. Lopes;J. M. Lopez;R. Lopez-Fernandez;D. Loukas;P. Lutz;L. Lyons;J. MacNaughton;J. R. Mahon;A. Maio;A. Malek;T. G. M.;S. Maltezos;V. Malychev;F. Mandl;J. Marco;R. Marco;B. Marechal;M. Margoni;J. C. Marin;C. Mariotti;A. Markou;C. Martinez-Rivero;F. Martinez-Vidal;S. M. I.;J. Masik;N. Mastroyiannopoulos;F. Matorras;C. Matteuzzi;G. Matthiae;F. Mazzucato;M. Mazzucato;M. McCubbin;R. McKay;R. McNulty;G. McPherson;C. Meroni;W. T. Meyer;A. Miagkov
Link alla scheda completa:
Pubblicato in: