The tau lepton lifetime has been measured with the e+e- -> tau+tau- events collected by the DELPHI detector at LEP in the years 1991-1995. Three different methods have been exploited, using both one-prong and three-prong tau decay channels. Two measurements have been made using events in which both taus decay to a single charged particle. Combining these measurements gave tau_tau (1 prong) = 291.8 +/- 2.3 (stat) +/- 1.5 (sys) fs. A third measurement using taus which decayed to three charged particles yielded tau_tau (3 prong) = 288.6 +/- 2.4 (stat) +/- 1.3 (sys) fs. These were combined with previous DELPHI results to measure the tau lifetime, using the full LEP1 data sample, to be tau_tau = 290.9 +/- 1.4 (stat) +/- 1.0 (sys) fs.
Titolo: | A Precise Measurement of the Tau Lifetime |
Autore/i: | J. ABDALLAH; P. ABREU; W. ADAM; P. ADZIC; T. ALBRECHT; T. ALDERWEIRELD; R. ALEMANY FERNANDEZ; T. ALLMENDINGER; P. ALLPORT; U. AMALDI; N. AMAPANE; S. AMATO; E. ANASHKIN; A. ANDREAZZA; S. ANDRINGA; N. ANJOS; P. ANTILOGUS; W. D. APEL; Y. ARNOUD; S. ASK; B. ASMAN; E. AUGUSTIN; A. AUGUSTINUS; P. BAILLON; A. BALLESTRERO; P. BAMBADE; R. BARBIER; D. BARDIN; J. BARKER; A. BARONCELLI; M. BATTAGLIA; M. BAUBILLIER; K. H. BECKS; M. BEGALLI; A. BEHRMANN; E. BEN HAIM; N. BENEKOS; A. BENVENUTI; C. BERAT; M. BERGGREN; L. BERNTZON; D. BERTRAND; M. BESANCON; N. BESSON; D. BLOCH; M. BLOM; M. BLUJ; M. BONESINI; M. BOONEKAMP; L. BOOTH; G. BORISOV; O. BOTNER; B. BOUQUET; V. BOWCOCK; I. BOYKO; M. BRACKO; R. BRENNER; E. BRODET; P. BRUCKMAN; M. BRUNET; L. BUGGE; P. BUSCHMANN; M. CALVI; T. CAMPORESI; V. CANALE; F. CARENA; N. CASTRO; F. CAVALLO; M. CHAPKIN; P.H. CHARPENTIER; P. CHECCHIA; R. CHIERICI; P. CHLIAPNIKOV; J. CHUDOBA; U. CHUNG; K. CIESLIK; P. COLLINS; R. CONTRI; G. COSME; F. COSSUTTI; J. COSTA; D. CRENNELL; J. CUEVAS; J. D’HONDT; J. DALMAU; T. DASILVA; W. DASILVA; G. DELLARICCA; A. DEANGELIS; W. DEBOER; C. DECLERCQ; B. DELOTTO; N. DEMARIA; A. DEMIN; L. DEPAULA; L. DICIACCIO; A. DISIMONE; K. DOROBA; J. DREES; M. DRIS; G. EIGEN; T. EKELOF; M. ELLERT; M. ELSING; C. ESPIRITOSANTO; G. FANOURAKIS; D. FASSOULIOTIS; M. FEINDT; J. FERNANDEZ; A. FERRER; F. FERRO; U. FLAGMEYER; H. FOETH; E. FOKITIS; F. FULDA QUENZER; J. FUSTER; M. GANDELMAN; C. GARCIA; P.H. GAVILLET; E. GAZIS; R. GOKIELI; B. GOLOB; G. GOMEZ CEBALLOS; P. GONCALVES; E. GRAZIANI; G. GROSDIDIER; K. GRZELAK; J. GUY; C. HAAG; A. HALLGREN; K. HAMACHER; K. HAMILTON; S. HAUG; F. HAULER; V. HEDBERG; M. HENNECKE; H. HERR; J. HOFFMAN; S. O. HOLMGREN; J. HOLT; A. HOULDEN; K. HULTQVIST; N. JACKSON; G. JARLSKOG; P. JARRY; D. JEANS; K. JOHANSSON; D. JOHANSSON; P. JONSSON; C. JORAM; L. JUNGERMANN; F. KAPUSTA; S. KATSANEVAS; E. KATSOUFIS; G. KERNEL; P. KERSEVAN; U. KERZEL; A. KIISKINEN; T. KING; J. KJAER; P. KLUIT; P. KOKKINIAS; C. KOURKOUMELIS; O. KOUZNETSOV; Z. KRUMSTEIN; M. KUCHARCZYK; J. LAMSA; G. LEDER; F. LEDROIT; L. LEINONEN; R. LEITNER; J. LEMONNE; V. LEPELTIER; T. LESIAK; W. LIEBIG; D. LIKO; A. LIPNIACKA; H. LOPES; M. LOPEZ; D. LOUKAS; P. LUTZ; L. LYONS; J. MACNAUGHTON; A. MALEK; S. MALTEZOS; F. MANDL; J. MARCO; R. MARCO; B. MARECHAL; M. MARGONI; J. C. MARIN; C. MARIOTTI; A. MARKOU; C. MARTINEZ RIVERO; J. MASIK; N. MASTROYIANNOPOULOS; F. MATORRAS; C. MATTEUZZI; F. MAZZUCATO; M. MAZZUCATO; R. MCNULTY; C. MERONI; E. MIGLIORE; W. MITAROFF; U. MJOERNMARK; T. MOA; M. MOCH; K. MOENIG; R. MONGE; J. MONTENEGRO; D. MORAES; S. MORENO; P. MORETTINI; U. MUELLER; K. MUENICH; M. MULDERS; L. MUNDIM; W. MURRAY; B. MURYN; G. MYATT; T. MYKLEBUST; M. NASSIAKOU; NAVARRIA, FRANCESCO LUIGI; K. NAWROCKI; R. NICOLAIDOU; M. NIKOLENKO; A. OBLAKOWSKA MUCHA; V. OBRAZTSOV; A. OLSHEVSKI; A. ONOFRE; R. ORAVA; K. OSTERBERG; A. OURAOU; A. OYANGUREN; M. PAGANONI; PAIANO, SIMONE; P. PALACIOS; H. PALKA; D. PAPADOPOULOU; L. PAPE; C. PARKES; F. PARODI; U. PARZEFALL; A. PASSERI; O. PASSON; L. PERALTA; V. PEREPELITSA; PERROTTA, ANDREA; A. PETROLINI; J. PIEDRA; L. PIERI; F. PIERRE; M. PIMENTA; E. PIOTTO; T. PODOBNIK; V. POIREAU; E. POL; G. POLOK; V. POZDNIAKOV; N. PUKHAEVA; A. PULLIA; J. RAMES; A. READ; P. REBECCHI; J. REHN; D. REID; R. REINHARDT; P. RENTON; F. RICHARD; J. RIDKY; M. RIVERO; D. RODRIGUEZ; A. ROMERO; P. RONCHESE; P. ROUDEAU; ROVELLI, TIZIANO; V. RUHLMANN KLEIDER; D. RYABTCHIKOV; A. SADOVSKY; L. SALMI; J. SALT; C. SANDER; A. SAVOY NAVARRO; U. SCHWICKERATH; A. SEGAR; R. SEKULIN; M. SIEBEL; A. SISAKIAN; G. SMADJA; O. SMIRNOVA; A. SOKOLOV; A. SOPCZAK; R. SOSNOWSKI; T. SPASSOV; M. STANITZKI; A. STOCCHI; J. STRAUSS; B. STUGU; M. SZCZEKOWSKI; M. SZEPTYCKA; T. SZUMLAK; T. TABARELLI; C. TAFFARD; F. TEGENFELDT; J. TIMMERMANS; L. TKATCHEV; M. TOBIN; S. TODOROVOVA; B. TOME; A. TONAZZO; P. TORTOSA; P. TRAVNICEK; D. TREILLE; G. TRISTRAM; M. TROCHIMCZUK; C. TRONCON; M. L. TURLUER; A. TYAPKIN; P. TYAPKIN; S. TZAMARIAS; V. UVAROV; G. VALENTI; P. VANDAM; J. VANELDIK; A. VANLYSEBETTEN; N. VANREMORTEL; I. VANVULPEN; G. VEGNI; F. VELOSO; W. VENUS; P. VERDIER; V. VERZI; D. VILANOVA; L. VITALE; V. VRBA; H. WAHLEN; J. WASHBROOK; C. WEISER; D. WICKE; J. WICKENS; G. WILKINSON; M. WINTER; M. WITEK; O. YUSHCHENKO; A. ZALEWSKA; P. ZALEWSKI; D. ZAVRTANIK; V. ZHURAVLOV; I. ZIMIN; A. ZINTCHENKO; M. ZUPAN |
Autore/i Unibo: | |
Anno: | 2004 |
Rivista: | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1140/epjc/s2004-01953-7 |
Abstract: | The tau lepton lifetime has been measured with the e+e- -> tau+tau- events collected by the DELPHI detector at LEP in the years 1991-1995. Three different methods have been exploited, using both one-prong and three-prong tau decay channels. Two measurements have been made using events in which both taus decay to a single charged particle. Combining these measurements gave tau_tau (1 prong) = 291.8 +/- 2.3 (stat) +/- 1.5 (sys) fs. A third measurement using taus which decayed to three charged particles yielded tau_tau (3 prong) = 288.6 +/- 2.4 (stat) +/- 1.3 (sys) fs. These were combined with previous DELPHI results to measure the tau lifetime, using the full LEP1 data sample, to be tau_tau = 290.9 +/- 1.4 (stat) +/- 1.0 (sys) fs. |
Data prodotto definitivo in UGOV: | 2005-10-18 23:08:20 |
Appare nelle tipologie: | 1.01 Articolo in rivista |