Using the data accumulated at LEP in 1989 and 1990 with the ALEPH detector, the inclusive and exclusive branching ratios of the lepton have been measured assuming lepton universality inZ 0 decays. The inclusive branching fractions for the decay into one, three, and five charged particles have been determined to be (85.45±0.97)%, (14.35±0.48)%, and (0.10±0.05)%, respectively, in agreement with the world averages. New undetected decay modes are determined to have a branching fraction of less than 2.1% at 95% CL. The measured branching ratios for quasi-exclusive channels are slightly larger than, but consistent with the world averages, except for the modes 3 hadrons+v andhadron+20 v , which are significantly larger. These latter branching ratios have been found to be (9.5±0.7)% and (10.2±1.1)%, respectively. The sum of all the measured quasi-exclusive branching ratios is (100.4±1.8)%. A fully exclusive analysis of modes with neutral pions shows no evidence for new photonic decay modes with a branching fraction limit of 3.4% at 95% CL.
Measurement of Tau branching ratios / D. Decamp;B. Deschizeaux;C. Goy;J. -P. Lees;M. -N. Minard;R. Alemany;J. M. Crespo;M. Delfino;E. Fernandez;V. Gaitan;Ll. Garrido;Ll. M. Mir;A. Pacheco;M. G. Catanesi;D. Creanza;M. Palma;A. Farilla;G. Iaselli;G. Maggi;M. Maggi;S. Natali;S. Nuzzo;M. Quattromini;A. Ranieri;G. Raso;F. Romano;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;G. Zito;H. Hu;D. Huang;X. Huang;J. Lin;J. Lou;C. Qiao;T. Ruan;T. Wang;Y. Xie;D. Xu;R. Xu;J. Zhang;W. Zhao;W. B. Atwood;L. A. T. Bauerdick;F. Bird;E. Blucher;G. Bonvicini;F. Bossi;J. Boudreau;T. H. Burnett;H. Drevermann;R. W. Forty;C. Grab;R. Hagelberg;S. Haywood;J. Hilgart;B. Jost;M. Kasemann;J. Knobloch;A. Lacourt;E. Lançon;I. Lehraus;T. Lohse;A. Lusiani;A. Marchioro;M. Martinez;P. Mato;S. Menary;T. Meyer;A. Minten;A. Miotto;R. Miquel;H. -G. Moser;J. Nash;P. Palazzi;F. Ranjard;G. Redlinger;L. Rolandi;A. Roth;J. Rothberg;M. Saich;D. Schlatter;M. Schmelling;W. Tejessy;H. Wachsmuth;S. Wasserbaech;W. Wiedenmann;W. Witzeling;J. Wotschack;Z. Ajaltouni;F. Badaud;M. Bardadin-Otwinowska;A. M. Bencheikh;R. Fellous;A. Falvard;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;J. -C. Montret;D. Pallin;P. Perret;B. Pietrzyk;J. Proriol;F. Prulhière;G. Stimpfl;J. D. Hansen;J. R. Hansen;P. H. Hansen;R. Møllerud;B. S. Nilsson;I. Efthymiopoulos;E. Simopoulos;A. Vayaki;J. Badier;A. Blondel;G. Bonneaud;J. C. Brient;G. Fouque;A. Gamess;J. Harvey;S. Orteu;A. Rosowsky;A. Rougé;M. Rumpf;R. Tanaka;H. Videau;D. J. Candlin;E. Veitch;L. Moneta;G. Parrini;M. Corden;C. Georgiopoulos;M. Ikeda;J. Lannutti;D. Levinthal;M. Mermikides;L. Sawyer;A. Antonelli;R. Baldini;G. Bencivenni;G. Bologna;P. Campana;G. Capon;F. Cerutti;V. Chiarella;B. D'Ettore-Piazzoli;G. Felici;P. Laurelli;G. Mannocchi;F. Murtas;G. P. Murtas;L. Passalacqua;M. Pepe-Altarelli;P. Picchi;P. Zografou;B. Altoon;O. Boyle;P. Colrain;A. W. Halley;I. Have;J. G. Lynch;W. Maitland;W. T. Morton;C. Raine;J. M. Scarr;K. Smith;A. S. Thompson;R. M. Turnbull;B. Brandl;O. Braun;R. Geiges;C. Geweniger;P. Hanke;V. Hepp;E. E. Kluge;Y. Maumary;A. Putzer;B. Rensch;A. Stahl;K. Tittel;M. Wunsch;A. T. Belk;R. Beuselinck;D. M. Binnie;W. Cameron;M. Cattaneo;P. J. Dornan;S. Dugeay;A. M. Greene;J. F. Hassard;N. M. Lieske;S. J. Patton;D. G. Payne;M. J. Phillips;J. K. Sedgbeer;G. Taylor;I. R. Tomalin;A. G. Wright;P. Girtler;D. Kuhn;G. Rudolph;C. K. Bowdery;T. J. Broodbeck;A. J. Finch;F. Foster;G. Hughes;D. Jackson;N. R. Keemer;M. Nuttall;A. Patel;T. Sloan;S. W. Snow;E. P. Whelan;T. Barczewski;K. Kleinknecht;J. Raab;B. Renk;S. Roehn;H. -G. Sander;H. Schmidt;F. Steeg;S. M. Walther;B. Wolf;J. -J. Aubert;C. Benchouk;V. Bernard;A. Bonissent;J. Carr;P. Coyle;J. Drinkhard;F. Etienne;S. Papalexiou;P. Payre;Z. Qian;D. Rousseau;P. Schwemling;M. Talby;S. Adlung;H. Becker;W. Blum;D. Brown;P. Cattaneo;G. Cowan;B. Dehning;H. Dietl;F. Dydak;M. Fernandez-Bosman;T. Hansl-Kosanecka;A. Jahn;W. Kozanecki;E. Lange;J. Lauber;G. Lütjens;G. Lutz;W. Männer;R. Richter;H. Rotscheidt;J. Schröder;A. S. Schwarz;R. Settles;U. Stierlin;U. Stiegler;R. St. Denis;M. Takashima;J. Thomas;G. Wolf;V. Bertin;J. Boucrot;O. Callot;X. Chen;A. Cordier;M. Davier;J. -F. Grivaz;Ph. Heusse;P. Janot;D. W. Kim;F. Diberder;J. Lefrançois;A. -M. Lutz;M. -H. Schune;J. -J. Veillet;I. Videau;Z. Zhang;F. Zomer;D. Abbaneo;S. R. Amendolia;G. Bagliesi;G. Batignani;L. Bosisio;U. Bottigli;C. Bradaschia;M. Carpinelli;M. A. Ciocci;R. Dell'Orso;I. Ferrante;F. Fidecaro;L. Foà;E. Focardi;F. Forti;C. Gatto;A. Grassi;M. A. Giorgi;F. Ligabue;E. B. Mannelli;P. S. Marrocchesi;A. Messineo;F. Palla;G. Sanguinetti;J. Steinberger;R. Tenchini;G. Tonelli;G. Triggiani;C. Vannini;A. Venturi;P. G. Verdini;J. Walsh;J. M. Carter;M. G. Green;P. V. March;T. Medcalf;I. S. Quasi;J. A. Strong;L. R. West;T. Wildish;D. R. Botterill;R. W. Clifft;T. R. Edgecock;M. Edwards;S. M. Fisher;T. J. Jones;P. R. Norton;D. P. Salmon;J. C. Thompson;B. Bloch-Devaux;P. Colas;E. Locci;S. Loucatos;E. Monnier;P. Perez;J. A. Perlas;F. Perrier;J. Rander;J. -F. Renardy;A. Roussarie;J. -P. Schuller;J. Schwindling;B. Vallage;J. G. Ashman;C. N. Booth;C. Buttar;R. E. Carney;S. Cartwright;F. Combley;M. Dogru;F. Hatfield;J. Martin;D. Parker;P. Reeves;L. F. Thompson;E. Barberio;S. Brandt;C. Grupen;H. Meinhard;L. Mirabito;U. Schäfer;H. Seywerd;G. Ganis;G. Giannini;B. Gobbo;F. Ragusa;L. Bellantoni;D. Cinabro;J. S. Conway;D. F. Cowen;Z. Feng;D. P. S. Ferguson;Y. S. Gao;J. Grahl;J. L. Harton;R. C. Jared;R. P. Johnson;B. W. LeClaire;C. Lishka;Y. B. Pan;J. R. Pater;Y. Saadi;V. Sharma;Z. H. Shi;Y. H. Tang;A. M. Walsh;J. A. Wear;F. V. Weber;M. H. Whitney; Sau Lan Wu;G. Zobernig. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - ELETTRONICO. - 54:(1992), pp. 211-228. [10.1007/BF01566649]
Measurement of Tau branching ratios
FOCARDI, ETTORE;
1992
Abstract
Using the data accumulated at LEP in 1989 and 1990 with the ALEPH detector, the inclusive and exclusive branching ratios of the lepton have been measured assuming lepton universality inZ 0 decays. The inclusive branching fractions for the decay into one, three, and five charged particles have been determined to be (85.45±0.97)%, (14.35±0.48)%, and (0.10±0.05)%, respectively, in agreement with the world averages. New undetected decay modes are determined to have a branching fraction of less than 2.1% at 95% CL. The measured branching ratios for quasi-exclusive channels are slightly larger than, but consistent with the world averages, except for the modes 3 hadrons+v andhadron+20 v , which are significantly larger. These latter branching ratios have been found to be (9.5±0.7)% and (10.2±1.1)%, respectively. The sum of all the measured quasi-exclusive branching ratios is (100.4±1.8)%. A fully exclusive analysis of modes with neutral pions shows no evidence for new photonic decay modes with a branching fraction limit of 3.4% at 95% CL.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.