The rate of gluon splitting into pairs in hadronic Z decays is measured using the data sample collected by ALEPH from 1991 to 1995. The selection is based on the identification of leptons (electrons and muons) originating from semileptonic charm decays, and on the topological properties of signal events. The result derived from the selected sample is %.
A measurement of the gluon splitting rate into pairs in hadronic Z decays / A. Heister;S. Schael;R. Barate;R. Brunelière;I. De Bonis;D. Decamp;C. Goy;S. Jezequel;J.-P. Lees;F. Martin;E. Merle;M.-N. Minard;B. Pietrzyk;B. Trocmé;S. Bravo;M.P. Casado;M. Chmeissani;J.M. Crespo;E. Fernandez;M. Fernandez-Bosman;Ll. Garrido;M. Martinez;A. Pacheco;H. Ruiz;A. Colaleo;D. Creanza;N. De Filippis;M. de Palma;G. Iaselli;G. Maggi;M. Maggi;S. Nuzzo;A. Ranieri;G. Raso;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;A. Tricomi;G. Zito;X. Huang;J. Lin;Q. Ouyang;T. Wang;Y. Xie;R. Xu;S. Xue;J. Zhang;L. Zhang;W. Zhao;D. Abbaneo;T. Barklow;O. Buchmüller;M. Cattaneo;F. Cerutti;B. Clerbaux;H. Drevermann;R.W. Forty;M. Frank;F. Gianotti;J.B. Hansen;J. Harvey;D.E. Hutchcroft;P. Janot;B. Jost;M. Kado;P. Mato;A. Moutoussi;F. Ranjard;L. Rolandi;D. Schlatter;G. Sguazzoni;W. Tejessy;F. Teubert;A. Valassi;I. Videau;F. Badaud;S. Dessagne;A. Falvard;D. Fayolle;P. Gay;J. Jousset;B. Michel;S. Monteil;D. Pallin;J.M. Pascolo;P. Perret;J.D. Hansen;J.R. Hansen;P.H. Hansen;A. Kraan;B.S. Nilsson;A. Kyriakis;C. Markou;E. Simopoulou;A. Vayaki;K. Zachariadou;A. Blondel;J.-C. Brient;F. Machefert;A. Rougé;M. Swynghedauw;R. Tanaka;H. Videau;V. Ciulli;E. Focardi;G. Parrini;A. Antonelli;M. Antonelli;G. Bencivenni;F. Bossi;G. Capon;V. Chiarella;P. Laurelli;G. Mannocchi;G.P. Murtas;L. Passalacqua;J. Kennedy;J.G. Lynch;P. Negus;V. O'Shea;A.S. Thompson;S. Wasserbaech;R. Cavanaugh;S. Dhamotharan;C. Geweniger;P. Hanke;V. Hepp;E.E. Kluge;G. Leibenguth;A. Putzer;H. Stenzel;K. Tittel;M. Wunsch;R. Beuselinck;W. Cameron;G. Davies;P.J. Dornan;M. Girone;R.D. Hill;N. Marinelli;J. Nowell;S.A. Rutherford;J.K. Sedgbeer;J.C. Thompson;R. White;V.M. Ghete;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;E. Bouhova-Thacker;C.K. Bowdery;D.P. Clarke;G. Ellis;A.J. Finch;F. Foster;G. Hughes;R.W.L. Jones;M.R. Pearson;N.A. Robertson;M. Smizanska;O. van der Aa;C. Delaere;V. Lemaitre;U. Blumenschein;F. Hölldorfer;K. Jakobs;F. Kayser;K. Kleinknecht;A.-S. Müller;B. Renk;H.-G. Sander;S. Schmeling;H. Wachsmuth;C. Zeitnitz;T. Ziegler;A. Bonissent;P. Coyle;C. Curtil;A. Ealet;D. Fouchez;P. Payre;A. Tilquin;F. Ragusa;A. David;H. Dietl;G. Ganis;K. Hüttmann;G. Lütjens;W. Männer;H.-G. Moser;R. Settles;M. Villegas;G. Wolf;J. Boucrot;O. Callot;M. Davier;L. Duflot;J.-F. Grivaz;Ph. Heusse;A. Jacholkowska;L. Serin;J.-J. Veillet;P. Azzurri;G. Bagliesi;T. Boccali;L. Foà;A. Giammanco;A. Giassi;F. Ligabue;A. Messineo;F. Palla;G. Sanguinetti;A. Sciabà;P. Spagnolo;R. Tenchini;A. Venturi;P.G. Verdini;O. Awunor;G.A. Blair;G. Cowan;A. Garcia-Bellido;M.G. Green;L.T. Jones;T. Medcalf;A. Misiejuk;J.A. Strong;P. Teixeira-Dias;R.W. Clifft;T.R. Edgecock;P.R. Norton;I.R. Tomalin;J.J. Ward;B. Bloch-Devaux;D. Boumediene;P. Colas;B. Fabbro;E. Lançon;M.-C. Lemaire;E. Locci;P. Perez;J. Rander;B. Tuchming;B. Vallage;N. Konstantinidis;A.M. Litke;G. Taylor;C.N. Booth;S. Cartwright;F. Combley;P.N. Hodgson;M. Lehto;L.F. Thompson;A. Böhrer;S. Brandt;C. Grupen;J. Hess;A. Ngac;G. Prange;C. Borean;G. Giannini;H. He;J. Putz;J. Rothberg;S.R. Armstrong;K. Berkelman;K. Cranmer;D.P.S. Ferguson;Y. Gao;S. González;O.J. Hayes;H. Hu;S. Jin;J. Kile;P.A. McNamara;J. Nielsen;Y.B. Pan;J.H. von Wimmersperg-Toeller;W. Wiedenmann;J. Wu;Sau Lan Wu;X. Wu;G. Zobernig;G. Dissertori. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 561:(2003), pp. 213-224. [10.1016/S0370-2693(03)00495-7]
A measurement of the gluon splitting rate into pairs in hadronic Z decays
FOCARDI, ETTORE;CIULLI, VITALIANO;
2003
Abstract
The rate of gluon splitting into pairs in hadronic Z decays is measured using the data sample collected by ALEPH from 1991 to 1995. The selection is based on the identification of leptons (electrons and muons) originating from semileptonic charm decays, and on the topological properties of signal events. The result derived from the selected sample is %.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.