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Titolo:
MEASUREMENT OF THE TAU LEPTON POLARIZATION AND ITS FORWARD-BACKWARD ASYMMETRY FROM Z(0) DECAYS
Autore:
AKERS R; ALEXANDER G; ALLISON J; 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; BECKER J; BEESTON C; BEHNKE T; BELL KW; BELLA G; BENTKOWSKI P; 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; BURGARD C; 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; COUPLAND M; CUFFIANI M; DADO S; DALLAPICCOLA C; DALLAVALLE GM; DARLING C; DEJONG S; DENG H; DITTMAR M; DIXIT MS; SILVA EDE; DUBOSCQ JE; DUCHOVNI E; DUCKECK G; DUERDOTH IP; DUNWOODY UC; ELCOMBE PA; ESTABROOKS PG; ETZION E; EVANS HG; FABBRI F; FABBRO B; FANTI M; FIERRO M; FINCKEKEELER M; FISCHER HM; FISCHER P; FOLMAN R; FONG DG; FOUCHER M; FUKUI H; FURTJES A; GAGNON P; GAIDOT A; GARY 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; GRANNIS P; GROSS E; HAGEMANN J; HANSON GG; HANSROUL M; HARGROVE CK; HART J; HART PA; HAUSCHILD M; HAWKES CM; HEFLIN E; HEMINGWAY RJ; HERTEN G; HEUER RD; HILL JC; HILLIER SJ; HILSE T; HINSHAW DA; HOBSON PR; HOCHMAN D; HOCKER A; HOMER RJ; HONMA AK; HOWARD R; HUGHESJONES RE; HUMBERT R; IGOKEMENES P; IHSSEN H; IMRIE DC; JAWAHERY A; JEFFREYS PW; JEREMIE H; JIMACK M; JONES M; JONES RWL; JOVANOVIC P; JUI C; KARLEN D; KAWAGOE K; KAWAMOTO T; KEELER RK; KELLOGG RG; KENNEDY BW; KING B; KING J; KLUTH S; KOBAYASHI T; KOBEL M; KOETKE DS; KOKOTT TP; KOMAMIYA S; KOWALEWSKI R; KRIEGER P; VONKROGH J; KYBERD P; LAFFERTY GD; LAFOUX H; LAHMANN R; LAUBER J; LAYTER JG; LEBLANC P; LEDU P; LEE AM; LEFEBVRE E; LEHTO MH; LELLOUCH D; LEROY C; LETTS J; LEVINSON L; LI Z; LIU F; LLOYD SL; 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; MATTIG P; MAUR U; MCKENNA J; MCMAHON TJ; MCNAB AI; MCNUTT JR; MEIJERS F; MERRITT FS; MES H; MICHELINI A; MIDDLETON RP; MIKENBERG G; MILDENBERGER J; MILLER DJ; MIR R; MOHR W; MOISAN C; 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; PFISTER P; 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; RONEY JM; ROS E; ROSSBERG S; 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; VONDERSCHMITT H; SCHRODER M; SCHUTZCOULON 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; SPRINGER RW; SPROSTON M; STAHL A; STEGMANN C; STEPHENS K; STEUERER J; STOCKHAUSEN B; STROHMER R; STROM D; SZYMANSKI P; TAKEDA H; TAKESHITA T; TAREM S; TECCHIO M; TEIXEIRADIAS P; TESCH N; THOMSON MA; TOWERS S; TSUKAMOTO T; TURNERWATSON MF; VANDENPLAS D; VANKOOTEN R; VASSEUR G; VINCTER M; WAGNER A; WAGNER DL; WARD CP; WARD DR; WARD JJ; WATKINS PM; WATSON AT; WATSON NK; WEBER P; WELLS PS; WERMES N; WILKENS B; WILSON GW; WILSON JA; WINTERER VH; WLODEK T; WOLF G; WOTTON S; WYATT TR; YEAMAN A; YEKUTIELI G; YURKO M; ZEUNER W; ZORN GT;
Indirizzi:
UNIV MANCHESTER,SCHUSTER LAB,DEPT PHYS MANCHESTER M13 9PL LANCS ENGLAND UNIV COLL LONDON LONDON WC1E 6BT ENGLAND UNIV LONDON BIRKBECK COLL LONDON WC1E 7HV ENGLAND UNIV LONDON,UNIV LONDON QUEEN MARY & WESTFIELD COLL LONDON E1 4NS ENGLAND INDIANA UNIV,DEPT PHYS BLOOMINGTON IN 47405 UNIV HEIDELBERG,INST PHYS D-69120 HEIDELBERG GERMANY UNIV MARYLAND,DEPT PHYS COLLEGE PK MD 20742 UNIV MONTREAL,PHYS NUCL LAB MONTREAL PQ H3C 3J7 CANADA UNIV OREGON,DEPT PHYS EUGENE OR 97403 RUTHERFORD APPLETON LAB DIDCOT OX11 0QX OXON ENGLAND CE SACLAY,CEA,DAPNIA SPP F-91191 GIF SUR YVETTE FRANCE TECHNION ISRAEL INST TECHNOL,DEPT PHYS IL-32000 HAIFA ISRAEL TEL AVIV UNIV,DEPT PHYS & ASTRON IL-69978 TEL AVIV ISRAEL UNIV TOKYO,INT CTR ELEMENTARY PARTICLE PHYS TOKYO 113 JAPAN UNIV TOKYO,DEPT PHYS TOKYO 113 JAPAN KOBE UNIV KOBE 657 JAPAN BRUNEL UNIV UXBRIDGE UB8 3PH MIDDX ENGLAND WEIZMANN INST SCI,DEPT PARTICLE PHYS IL-76100 REHOVOT ISRAEL UNIV HAMBURG,DESY,INST EXPTL PHYS 2 D-22607 HAMBURG GERMANY UNIV VICTORIA,DEPT PHYS VICTORIA BC V8W 3P6 CANADA UNIV BRITISH COLUMBIA,DEPT PHYS VANCOUVER BC V6T 1Z1 CANADA UNIV ALBERTA,DEPT PHYS EDMONTON AB T6G 2J1 CANADA DUKE UNIV,DEPT PHYS DURHAM NC 27708 UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM B15 2TT W MIDLANDS ENGLAND UNIV BOLOGNA,DIPARTIMENTO FIS I-40126 BOLOGNA ITALY INFN I-40126 BOLOGNA ITALY UNIV BONN,INST PHYS D-53115 BONN GERMANY UNIV CALIF RIVERSIDE,DEPT PHYS RIVERSIDE CA 92521 UNIV CAMBRIDGE,CAVENDISH LAB CAMBRIDGE CB3 0HE ENGLAND CARLETON UNIV,PARTICLE PHYS RES CTR OTTAWA ON K1S 5B6 CANADA CERN,EUROPEAN ORG PARTICLE PHYS CH-1211 GENEVA 23 SWITZERLAND UNIV CHICAGO,ENRICO FERMI INST CHICAGO IL 60637 UNIV CHICAGO,DEPT PHYS CHICAGO IL 60637 UNIV FREIBURG,FAK PHYS D-79104 FREIBURG GERMANY CARLETON UNIV,DEPT PHYS OTTAWA ON K1S 5B6 CANADA RHEIN WESTFAL TH AACHEN,INST PHYS 3 D-52056 AACHEN GERMANY
Titolo Testata:
Zeitschrift fur Physik. C, Particles and fields
fascicolo: 1, volume: 65, anno: 1995,
pagine: 1 - 16
SICI:
0170-9739(1995)65:1<1:MOTTLP>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
MONTE-CARLO; RADIATIVE-CORRECTIONS; PHOTON CORRECTIONS; BHABHA SCATTERING; OPAL EXPERIMENT; HIGH-ENERGIES; Z-RESONANCE; DETECTOR; PROGRAM; QUARK;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
R. Akers et al., "MEASUREMENT OF THE TAU LEPTON POLARIZATION AND ITS FORWARD-BACKWARD ASYMMETRY FROM Z(0) DECAYS", Zeitschrift fur Physik. C, Particles and fields, 65(1), 1995, pp. 1-16

Abstract

We report on a measurement of the tau lepton polarization and its forward-backward asymmetry at the Z(0) resonance using the OPAL detector. This measurement is based on analyses of the tau-->e<(nu)over bar>(e)nu(tau), tau-->mu<(nu)over bar>(mu)nu(tau), tau-->pi(K)nu(tau) and tau-->rho nu(tau)decays from a sample of 30663 e(+)e(-)-->tau(+)tau(-) events collected during the years 1990 to 1992. Assuming that the tau lepton decays according to V-A theory, we measure the average tau polarization to be [P-tau] = (-14.9 +/- 1.9 +/- 1.3)% and the tau polarization forward-backward asymmetry to be A(pol)(FB) = (-8.9 +/- 2.2 +/- 0.9)%, where the first error is statistical and the second systematic. These results are consistent with the hypothesis of lepton universality. When combined under the assumption of universality, our results can be interpreted as a measurement of sin(2) theta(eff)(lept) = 0.2321 +/- 0.0023 within the context of the Standard Model.

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Documento generato il 05/12/20 alle ore 06:13:52