Data di Pubblicazione:
2001
Abstract:
Measurements of on-shell ZZ production are described, using data collected by DELPHI in 1997 and 1998, at centre-of-mass energies roots = 182.6 GeV and 188.6 GeV, respectively. Results obtained in each of the final states q (q) over barq (q) over bar, mu (+)mu (-) q (q) over bar e(+)e(-)q (q) over bar, nu<()over bar>q (q) over bar, l(+)l(-)l(+)l(-), and nu<()over bar>l(+)l(-) are presented. The measured cross-sections for on-shell ZZ production via the tree-level doubly-resonant graphs (NC02) are: sigma (NC02) (182.6 GeV) = 0.38 +/- 0.18 (stat) +/- 0.04 (syst) pb, sigma (NC02) (188.6 GeV) = 0.60+/-0.13 (stat) +/- 0.07 (syst) pb. They are consistent with the Standard Model expectations of 0.25 and 0.65 pb at each energy. (C) 2001 Published by Elsevier Science B.V.
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;L. Berntzon;D. Bertrand;M. Besancon;M. S. Bilenky;M. A. Bizouard;D. Bloch;H. M. Blom;M. Bonesini;M. Boonekamp;P. S. L.;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;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;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;M. Costa;H. B. Crawley;D. Crennell;J. Croix;J. C. Maestro;S. Czellar;J. D'Hondt;J. Dalmau;M. Davenport;W. D. Silva;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;G. Eigen;T. Ekelof;M. Ellert;M. Elsing;J. P. Engel;M. E. Santo;G. Fanourakis;D. Fassouliotis;M. Feindt;J. Fernandez;A. Ferrer;E. Ferrer-Ribas;F. Ferro;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;T. Geralis;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;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;S. Haug;F. Hauler;V. Hedberg;S. Heising;J. J. Hernandez;P. Herquet;H. Herr;E. Higon;S. O. Holmgren;P. J. Holt;S. Hoorelbeke;M. Houlden;J. Hrubec;M. Huber;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;Y. Khokhlov;B. A. Khomenko;N. N. Khovanski;A. Kiiskinen;B. King;A. Kinvig;N. J. Kjaer;O. Klapp;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;J. P. Laugier;R. Lauhakangas;G. Leder;F. Ledroit;L. Leinonen;A. Leisos;R. Leitner;J. Lemonne;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;S. Maltezos;V. Malychev;F. Mandl;J. Marco;R. Marco;B. Marechal;M. Margoni;J. C. Marin;C. Mariotti;A. Markou;C. Martinez-Rivero;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;E. Merle;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;J. Montenegro;D. Moraes;P. Morettini;G. Morton;U. Mueller;K. Muenich;M. Mulders;C. Mulet-Marquis;L. M. Mundim;R. Mure
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