MEASUREMENT OF THE TAU-LEPTON LIFETIME WITH THE 3-DIMENSIONAL IMPACT PARAMETER METHOD

Authors
BARATE R BUSKULIC D DECAMP D GHEZ P GOY C LEES JP LUCOTTE A MINARD MN NIEF JY PIETRZYK B CASADO MP CHMEISSANI M COMAS P CRESPO JM DELFINO M FERNANDEZ E FERNANDEZBOSMAN M GARRIDO LL JUSTE A MARTINEZ M MIQUEL R MIR LIM ORTEU S PADILLA C PARK LC PASCUAL A PERLAS JA RIU I SANCHEZ F TEUBERT F COLALEO A CREANZA D DEPALMA M GELAO G IASELLI G MAGGI G MAGGI M MARINELLI N NUZZO S RANIERI A RASO G RUGGIERI F SELVAGGI G SILVESTRIS L TEMPESTA P TRICOMI A ZITO G HUANG X LIN J OUYANG Q WANG T XIE Y XU R XUE S ZHANG J ZHANG L ZHAO W ABBANEO D ALEMANY R BECKER U BAZARKO AO BRIGHTTHOMAS P CATTANEO M CERUTTI F DREVERMANN H FORTY RW FRANK M HAGELBERG R HARVEY J JANOT P JOST B KNERINGER E KNOBLOCH J LEHRAUS I LUTTERS G MATO P MINTEN A MONETA L PACHECO A PUSZTASZERI JF RANJARD F RENSING P RIZZO G ROLANDI L SCHLATTER D SCHMITT M SCHNEIDER O TEJESSY W TOMALIN IR WACHSMUTH H WAGNER A AJALTOUNI Z BARRES A BOYER C FALVARD A FERDI C GAY P GUICHENEY C HENRARD P JOUSSET J MICHEL B MONTEIL S MONTRET JC PALLIN D PERRET P PODLYSKI F PRORIOL J ROSNET P ROSSIGNOL JM FEARNLEY T HANSEN JB HANSEN JD HANSEN JR HANSEN PH NILSSON BS RENSCH B WAANANEN A DASKALAKIS G KYRIAKIS A MARKOU C SIMOPOULOU E SIOTIS I VAYAKI A CANDLIN DJ PARSONS MI FOCARDI E PARRINI G ZACHARIADOU K CORDEN M GEORGIOPOULOS C JAFFE DE ANTONELLI A BENCIVENNI G BOLOGNA G BOSSI F CAMPANA P CAPON G CASPER D CHIARELLA V FELICI G LAURELLI P MANNOCCHI G MURTAS F MURTAS GP PASSALACQUA L PEPEALTARELLI M CURTIS L DORRIS SJ HALLEY AW KNOWLES IG LYNCH JG OSHEA V RAINE C SCARR JM SMITH K TEIXEIRADIAS P THOMPSON AS THOMSON E THOMSON F TURNBULL RM GEWENIGER C GRAEFE G HANKE P HANSPER G HEPP V KLUGE EE PUTZER A SCHMIDT M SOMMER J TITTEL K WERNER S WUNSCH M BEUSELINCK R BINNIE DM CAMERON W DORNAN PJ GIRONE M GOODSIR S MARTIN EB MOUTOUSSI A NASH J SEDGBEER JK STACEY AM WILLIAMS MD DISSERTORI G GIRTLER P KUHN D RUDOLPH G BETTERIDGE AP BOWDERY CK COLRAIN P CRAWFORD G FINCH AJ FOSTER F HUGHES G SLOAN T WILLIAMS MI GALLA A GIEHL I GREENE AM HOFFMANN C JAKOBS K KLEINKNECHT K QUAST G RENK B ROHNE E SANDER HG VANGEMMEREN P ZEITNITZ C AUBERT JJ BENCHOUK C BONISSENT A BUJOSA G CALVET D CARR J COYLE P DIACONU C ETIENNE F KONSTANTINIDIS N LEROY O MOTSCH F PAYRE P ROUSSEAU D TALBY M SADOUKI A THULASIDAS M TRABELSI K ALEPPO M RAGUSA F BERLICH R BLUM W BUSCHER V DIETL H DYDAK F GANIS G GOTZHEIN C KROHA H LUTJENS G LUTZ G MANNER W MOSER HG RICHTER R ROSADOSCHLOSSER A SCHAEL S SETTLES R SEYWERD H STDENIS R STENZEL H WIEDENMANN W WOLF G BOUCROT J CALLOT O CHEN S CHOI Y CORDIER A DAVIER M DUFLOT L GRIVAZ JF HEUSSE P HOCKER A JACHOLKOWSKA A MACQUET M KIM DW LEDIBERDER F LEFRANCOIS J LUTZ AM NIKOLIC I SCHUNE MH SIMION S TOURNEFIER E VEILLET JJ VIDEAU I ZERWAS D AZZURRI P BAGLIESI G BATIGNANI G BETTARINI S BOZZI C CALDERINI G CARPINELLI M CIOCCI MA CIULLI V DELLORSO R FANTECHI R FERRANTE I FOA L FORTI F GIASSI A GIORGI MA GREGORIO A LIGABUE F LUSIANI A MARROCCHESI PS MESSINEO A FALLA F SANGUINETTI G SCIABA A SPAGNOLO P STEINBERGER J TENCHINI R TONELLI G VANNINI C VENTURI A VERDINI PG BLAIR GA BRYANT LM CHAMBERS JT GAO Y GREEN MG MEDCALF T PERRODO P STRONG JA VONWIMMERSPERGTOELLER JH BOTTERILL DR CLIFFT RW EDGECOCK TR HAYWOOD S MALEY P NORTON PR THOMPSON JC WRIGHT AE BLOCHDEVAUX B COLAS P EMERY S KOZANECKI W LANCON E LEMAIRE MC LOCCI E PEREZ P RANDER J RENARDY JF ROUSSARIE A SCHULLER JP SCHWINDLING J TRABELSI A VALLAGE B BLACK SN DANN JH JOHNSON RP KIM HY LITKE AM MCNEIL MA TAYLOR G BOOTH CN BOSWELL R BREW CAJ CARTWRIGHT S COMBLEY F KELLY MS LEHTO M NEWTON WM REEVE J THOMPSON LF BOHRER A BRANDT S COWAN G GRUPEN C SARAIVA P SMOLIK L STEPHAN F APOLLONIO M BOSISIO L DELLAMARINA R GIANNINI G GOBBO B MUSOLINO G ROTHBERG J WASSERBAECH S ARMSTRONG SR CHARLES E ELMER P FERGUSON DPS GAO YS GONZALEZ S GREENING TC HAYES OJ HU H JIN S MCNAMARA PA NACHTMAN JM NIELSEN J OREJUDOS W PAN YB SAADI Y SCOTT IJ WALSH J WU SL WU X YAMARTINO JM ZOBERNIG G
Citation
R. Barate et al., MEASUREMENT OF THE TAU-LEPTON LIFETIME WITH THE 3-DIMENSIONAL IMPACT PARAMETER METHOD, Zeitschrift fur Physik. C, Particles and fields, 74(3), 1997, pp. 387-398
Citations number
22
Categorie Soggetti
Physics, Particles & Fields
Journal title
Zeitschrift fur Physik. C, Particles and fields → ACNP
ISSN journal
01709739
Volume
74
Issue
3
Year of publication
1997
Pages
387 - 398
Database
ISI
SICI code
0170-9739(1997)74:3<387:MOTTLW>2.0.ZU;2-0
Abstract
A new method is presented for the measurement of the mean tau lepton l ifetime using events in which tau's are pair-produced and both tau's d ecay to hadrons and nu(tau). Based on the correlation between the two tau's produced at a symmetric e(+)e(-) collider, the 3DIP method relie s on the three-dimensional information from a double-sided vertex dete ctor and on kinematic constraints for the precise measurement of the t au decay angles. Using the data collected from 1992 to 1994 with the A LEPH detector at LEP, a tau lifetime of 288.0 +/- 3.1 +/- 1.3 fs is ob tained from the sample in which both tau's decay to one charged track, and 292.8 +/- 5.6 +/- 3.0 fs from the sample in which one tau decays to one prong and the other to three prongs. The results show small sta tistical correlations with those derived from other methods. When comb ined with the previously published ALEPH measurements, the resulting t au lifetime is 291.2 +/- 2.0 +/- 1.2 fs.