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A TEST OF CP-INVARIANCE IN Z0-]TAU(-) USING OPTIMAL OBSERVABLES()TAU()

Authors

AKERS R ALEXANDER G ALLISON J AMETEWEE K ANDERSON KJ ARCELLI S ASAI S ASTBURY A AXEN D AZUELOS G BALL AH BARBERIO E BARLOW RJ BARTOLDUS R BATLEY JR BEAUDOIN G BECK A BECK GA BEESTON C BEHNKE T BELL KW BELLA G BENTVELSEN S BERLICH P BETHKE S BIEBEL O BLOODWORTH IJ BOCK P BOSCH HM BOUTEMEUR M BRAIBANT S BRIGHTTHOMAS P BROWN RM BUIJS A BURCKHART HJ BURGIN R BURGARD C CAPDEVIELLE N CAPILUPPI P CARNEGIE RK CARTER AA CARTER JR CHANG CY CHARLESWORTH C CHARLTON DG CHU SL CLARKE PEL CLAYTON JC CLOWES SG COHEN I CONBOY JE CUFFIANI M DADO S DALLAPICCOLA C DALLAVALLE GM DARLING C DEJONG S DELPOZO LA DENG H DITTMAR M DIXIT MS SILVA ED DUBOSCQ JE DUCHOVNI E DUCKECK G DUERDOTH IP DUNWOODY UC ELCOMBE PA ESTABROOKS PG ETZION E EVANS HG FABBRI F FABBRO B FANTI M FATH P FIERRO M FINCKEKEELER M FISCHER HM FISCHER P FOLMAN R FONG DG FOUCHER M FUKUI H FURTJES A GAGNON P GAIDOT A GAQRY JW GASCON J GEDDES NI GEICHGIMBEL C GENSLER SW GENTIT FX GERALIS T GIACOMELLI G GIACOMELLI P GIACOMELLI R GIBSON V GIBSON WR GILLIES JD GOLDBERG J GINGRICH DM GOODRICK MJ GORN W GRANDI C GROSS E HAGEMANN J HANSON GG HANSROUL M HARGROVE CK HART PA HAUSCHILD M HAWKES CM HEFLIN E HEMINGWAY RJ HERTEN G HEUER RD HILL JC HILLIER SJ HILSE T HOBSON PR HOCHMAN D HOCKER A HOMER RJ HONMA AK HOWARD R HUGHESJONES RE IGOKEMENES P IMRIE DC JAWAHERY A JEFFREYS PW JEREMIE H JIMACK M JONES M JONES RWL JOVANOVIC P JUI C KARLEN D KANZAKI J KAWAGOE K KAWAMOTO T KEELER RK KELLOGG RG KENNEDY BW KING B KING J KIRK J KLUTH S KOBAYASHI T KOBEL M KOETKE DS KOKOTT TP KOMAMIYA S KOWALEWSKI R KRESS T KRIEGER P VONKROGH J KYBERD P LAFFERTY GD LAFOUX H LAHMANN R LAI WP LAUBER J LAYTER JG LEBLANC P LEDU P LEE AM LEFEBVRE E LELLOUCH D LEROY C LETTS J LEVINSON L LI Z LIU F LLOYD SOL LOEBINGER FK LONG GD LORAZO B LOSTY MJ LOU XC LUDWIG J LUIG A MANNELLI M MARCELLINI S MARKUS C MARTIN AJ MARTIN JP MASHIMO T MATTHEWS W MATTIG P MAUR U MCKENNA J MCMAHON TJ MCNAB AI MEIJERS F MERRITT FS MES H MICHELINI A MIDDLETON RP MIKENBERG G MILLER DJ MIR R MOHR W MONTANARI A MORI T MORII M MULLER U NELLEN B NIJJHAR B ONEALE SW OAKHAM FG ODORICI F OGREN HO ORAM CJ OREGLIA MJ ORITO S PANSART JP PATRICK GN PEARCE MJ PHILLIPS PD PILCHER JE PINFOLD J PITMAN D PLANE DE POFFENBERGER P POLI B POSTHAUS A PRITCHARD TW PRZYSIEZNIAK H REDMOND MW REES DL RIGBY D RISON M ROBINS SA ROBINSON D RODNING N RONEY JM ROS E ROSSI AM ROSVICK M ROUTENBURG P ROZEN Y RUNGE K RUNOLFSSON O RUST DR SASAKI M SBARRA C SCHAILE AD SCHAILE O SCHARF F SCHARFFHANSEN P SCHENK P SCHMITT B SCHRODER M SCHULTZCOULON HC SCHUTZ P SCHULZ M SCHWICK C SCHWIENING J SCOTT WG SETTLES M SHEARS TG SHEN BC SHEPHERDTHEMISTOCLEOUS CH SHERWOOD P SIROLI GP SKILLMAN A SKUJA A SMITH AM SMITH TJ SNOW GA SOBIE R SOLDNERREMBOLD S SPRINGER RW SPROSTON M STAHL A STARKS M STEGMANN C STEPHENS K STEUERER J STOCKHAUSEN B STROM D SZYMANSKI P TAFIROUT R TAKEDA H TAKESHITA T TARAS P TAREM S TECCHIO M TEXEIRADIAS P TESCH N THOMSON MA TOUSIGNANT O TOWERS S TARAS P TAREM S TECCHIO M TEXIEIRADIAS P TESCH N THOMSON MA TOUSIGNANT O TOWERS S TSCHEULIN M TSUKAMOTO T TURCOT A TURNERWATSON MF UTZAT P VANKOOTEN R VASSEUR G VIKAS P VINCTER M WAGNER A WAGNER DL WARD CP WARD DR WARD JJ WATKINS PM WATSON AT WATSON NK WEBER P WELLS PS WERMERS N WILKENS B WILSON GW WILSON JA WINTERER VH WLODEK T WOLF G WOTTON S WYATT TR YEAMAN A YEUKTIELI G YURKO M ZACEK V ZEUNER W ZORN GT

Citation

R. Akers et al., A TEST OF CP-INVARIANCE IN Z0-]TAU(-) USING OPTIMAL OBSERVABLES()TAU(), Zeitschrift fur Physik. C, Particles and fields, 66(1-2), 1995, pp. 31-44

Citations number

Categorie Soggetti

Physics, Particles & Fields

Journal title

Zeitschrift fur Physik. C, Particles and fields → ACNP

ISSN journal

01709739

Volume

Issue

1-2

Year of publication

1995

Pages

31 - 44

Database

ISI

SICI code

0170-9739(1995)66:1-2<31:ATOCIZ>2.0.ZU;2-M

Abstract

Using 27 490 Z0 --> tau+tau- decays, accumulated in 1991, 1992 and 199 3 with the OPAL detector at LEP, a direct test of CP-invariance in the neutral current reaction e+e- --> tau+tau- is performed by measuring CP-odd observables which are proportional to the weak dipole moment of the tau-lepton. A new method based on optimal CP-odd observables cons tructed from the tau flight and spin directions is employed. More sens itive measurements of the real and, for the first time, the imaginary part of the weak dipole moment with highest possible signal to noise r atio are obtained. No evidence for a non-zero expectation value of the considered observables and hence for CP-violation is observed. An upp er limit on the weak dipole moment of \Re(d(tau)omega)\ < 7.8 x 10(-18 ) e.cm and \Im(d(tau)omega)\ < 4.5 x 10(-17) e.cm with 95% confidence level is obtained.