Determination of vertical bar V-ub vertical bar/vertical bar V-cb vertical bar with DELPHI at LEP
Articolo
Data di Pubblicazione:
2000
Abstract:
The ratio of the CKM quark-mixing matrix elements \V-ub\/\V-cb\ has been measured using B hadron semileptonic decays. The analysis uses the reconstructed mass M-X of the secondary hadronic system produced in association with an identified lepton. Since B --> X(u)l (v) over bar transitions are characterised by hadronic masses below those of the D mesons produced in B --> X(c)l (v) over bar transitions, events with a reconstructed value of M-X significantly below the D mass are selected. Further signal enrichments are obtained using the topology of reconstructed decays and hadron identification. A fit to the numbers of decays in the b --> u enriched and depleted samples with M-X above and below 1.6 GeV/c(2) and to the shapes of the lepton energy distribution in the B rest frame gives \V-ub\/\V-cb\ = 0.103 (+0.011)(-0.012) (stat.) +/- 0.016(syst.) +/- 0.010(model) and, correspondingly, a charmless semileptonic B decay branching fraction of BR(B --> X(u)l (v) over bar)= (1.57 +/- 0.35 (stat.) +/- 0.48(syst.) +/- 0.27(model)) x 10(-3). (C) 2000 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;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;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;K. Belous;M. Benekos;A. C. Benvenuti;C. Berat;M. Berggren;D. Bertrand;M. Besancon;M. Bigi;M. S. Bilenky;M. A. Bizouard;D. Bloch;H. M. Blom;M. Bonesini;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;M. Bracko;P. Branchini;R. A. Brenner;P. Bruckman;J. M. Brunet;L. Bugge;T. Buran;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;M. Chapkin;P. Charpentier;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;H. B. Crawley;D. Crennell;S. Crepe;G. Crosetti;J. C. Maestro;S. Czellar;M. Davenport;W. D. Silva;G. D. Ricca;P. Delpierre;N. Demaria;A. D. Angelis;W. D. Boer;C. D. Clercq;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;M. P. Engel;M. E. Santo;G. Fanourakis;D. Fassouliotis;J. Fayot;M. Feindt;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;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;P. Gris;G. Grosdidier;K. Grzelak;J. Guy;C. Haag;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;M. Huber;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;D. Jeans;E. K. Johansson;P. Jonsson;C. Joram;P. Juillot;L. Jungermann;F. Kapusta;K. Karafasoulis;S. Katsanevas;E. C. Katsoufis;R. Keranen;G. Kernel;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;V. Kostioukhine;C. Kourkoumelis;O. Kouznetsov;M. Krammer;E. Kriznic;Z. Krumstein;P. Kubinec;J. Kurowska;K. Kurvinen;J. W. Lamsa;D. W. Lane;V. Lapin;J. P. Laugier;R. Lauhakangas;G. Leder;F. Ledroit;V. Lefebure;L. Leinonen;A. Leisos;R. Leitner;G. Lenzen;V. Lepeltier;T. Lesiak;M. Lethuillier;J. Libby;W. Liebig;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;E. Migliore;L. Mirabito;W. A. Mitaroff;U. Mjoernmark;T. Moa;M. Moch;R. Moeller;K. Moenig;M. R. Monge;D. Moraes;X. Moreau;P. Morettini;G. Morton;U. Mueller;K. Muenich;M. Mulders;C. Mulet-Marquis;R. Muresan;W. J.
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