THE FORWARD-BACKWARD ASYMMETRY OF E(-) -] B(B)OVER-BAR AND E(+) E(-) -] C(C)OVER-BAR USING LEPTONS IN HADRONIC Z(0) DECAYS() E()

Authors
ACTON PD AKERS R ALEXANDER G ALLISON J ANDERSON KJ ARCELLI S ASTBURY A AXEN D AZUELOS G BAINES JTM BALL AH BANKS J BARLOW RJ BARNETT S BARTOLDUS R BATLEY JR BEAUDOIN G BECK A BECK GA BECKER J BEESTON C BEHNKE T BELL KW BELLA G BENTKOWSKI P BERLICH P BETHKE S BIEBEL O BLOODWORTH IJ BOCK P BODEN B BOSCH HM BOUTEMEUR M BREUKER H BRIGHTTHOMAS P BROWN RM BUIJS A BURCKHART HJ BURGARD C CAPILUPPI P CARNEGIE RK CARTER AA CARTER JR CHANG CY CHARLTON DG CHU SL CLARKE PEL CLAYTON JC COLLINS WJ COHEN I CONBOY JE COOPER M COUPLAND M CUFFIANI M DADO S DALLAVALLE GM DEJONG S DELPOZO LA DENG H DIECKMANN A DITTMAR M DIXIT MS SILVA EDE DUBOSCQ JE DUCHOVNI E DUCKECK G DUERDOTH IP DUMAS DJP ELCOMBE PA ESTABROOKS PG ETZION E EVANS HG FABBRI F FABBRO B FIERRO M FINCKEKEELER M FISCHER HM FONG DG FOUCHER M GAIDOT A GARY JW GASCON J GEDDES NI GEICHGIMBEL C GENSLER SW GENTIT FX GIACOMELLI G GIACOMELLI R GIBSON V GIBSON WR GILLIES JD GOLDBERG J GINGRICH DM GOODRICK MJ GORN W GRANDI C GRANT FC HAGEMANN J HANSON GG HANSROUL M HARGROVE CK HARRISON PF HART J HATTERSLEY PM HAUSCHILD M HAWKES CM HEFLIN E HEMINGWAY RJ HERTEN G HEUER RD HILL JC HILLIER SJ HILSE T HINSHAW DA HOBBS JD HOBSON PR HOCHMAN D HOMER RJ HONMA AK HUGHESJONES RE HUMBERT R IGOKEMENES P IHSSEN H IMRIE DC JANISSEN AC 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 KLUTH S KOBAYASHI T KOETKE DS KOKOTT TP KOMAMIYA S KOPKE L KRAL JF KOWALEWSKI R VONKROGH J KROLL J KUWANO M KYBERD P LAFFERTY GD LAFOUX H LAHMANN R LAMARCHE F LAYTER JG LEBLANC P LEE AM LEHTO MH LELLOUCH D LEROY C LETTS J LEVEGRUN S LEVINSON L LLOYD SL LOEBINGER FK LORAH JM 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 MCNUTT JR MEIJERS F MENSZNER D 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 NGUYEN HH ONEALE SW OAKHAM FG ODORICI F OGREN HO ORAM CJ OREGLIA MJ ORITO S PANSART JP PANZERSTEINDEL B PASCHIEVICI P PATRICK GN PAZJAOSHVILI N PEARCE MJ PFISTER P PILCHER JE PINFOLD J PITMAN D PLANE DE POFFENBERGER P POLI B POULADDEJ A PRITCHARD TW PRZYSIEZNIAK H QUAST G REDMOND MW REES DL RICHARDS GE ROBINS SA ROBINSON D ROLLNIK A RONEY JM ROS E ROSSBERG S ROSSI AM ROSVICK M ROUTENBURG P RUNGE K RUNOLFSSON O RUST DR SASAKI M SBARRA C SCHAILE AD SCHAILE O SCHAPPERT W SCHARFFHANSEN P SCHENK P SCHMITT B VONDERSCHMITT H SCHRODER M SCHWICK C SCHWIENING J SCOTT WG SETTLES M SHEARS TG SHEN BC SHEPHERDTHEMISTOCLEOUS CH SHERWOOD P SHYPIT R 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 STROHMER R STROM D TAKEDA H TAKESHITA T TAREM S TECCHIO M TEIXEIRADIAS P TESCH N THOMSON MA TORRENTELUJAN E TOWERS S TRANSTROMER G TRESILIAN NJ TSUKAMOTO T TURNER MF VANDENPLAS D VANKOOTEN R VANDALEN GJ VASSEUR G VIRTUE CJ WAGNER A WAGNER DL WAHL C WARD CP WARD DR WATKINS PM WATSON AT WATSON NK WEBER M WEBER P WELLS PS WERMES N WHALLEY MA WILKENS B WILSON GW WILSON JA WINTERER VH WLODEK T WOLF G WOTTON S WYATT TR YAARI R YEAMAN A YEKUTIELI G YURKO M ZEUNER W ZORN GT
Citation
Pd. Acton et al., THE FORWARD-BACKWARD ASYMMETRY OF E(-) -] B(B)OVER-BAR AND E(+) E(-) -] C(C)OVER-BAR USING LEPTONS IN HADRONIC Z(0) DECAYS() E(), Zeitschrift fur Physik. C, Particles and fields, 60(1), 1993, pp. 19-35
Citations number
36
Categorie Soggetti
Physics, Particles & Fields
Journal title
Zeitschrift fur Physik. C, Particles and fields → ACNP
ISSN journal
01709739
Volume
60
Issue
1
Year of publication
1993
Pages
19 - 35
Database
ISI
SICI code
0170-9739(1993)60:1<19:TFAOE->2.0.ZU;2-A
Abstract
The forward-backward asymmetries of e+e- --> Z0 --> bbBAR and e+e- --> Z0 --> ccBAR have been measured by the OPAL Collaboration using sampl es of hadronic Z0 decays in which electron or muon candidates were obs erved. The asymmetries were measured simultaneously in a two parameter fit, which used the distributions of the track momentum and transvers e momentum component with respect to the associated jet to distinguish lepton candidates from different sources. From a sample of 360 000 ha dronic events with centre-of-mass energies within +/- 0.5 GeV of the Z 0 mass and mean energy 91.24 GeV, the values obtained for the bbBAR as ymmetry before and after correcting for the effect of B0B0BAR mixing, and for the ccBAR asymmetry are, respectively: A(FB)b,mix = 0.070 +/- 0.014 (stat) +/- 0.005 (sys) , A(FB)b = 0.092 +/- 0.018 (stat) +/- 0.0 07 (sys) +/- 0.003 (mix), A(FB)c = 0.014 +/- 0.030 (stat) +/- 0.020 (s ys). The measurement of the bbBAR asymmetry Is confirmed by a measurem ent using only leptons with high transverse momentum. This sample is h ighly enriched in semileptonic decays of b hadrons. Measurements using high transverse momentum leptons were also performed using samples of events with centre-of-mass energies further from the Z0 mass. After c orrecting for the effect of B0B0 mixing, the results are: A(FB)b ([squ are-root s] = 89.66 GeV) = 0.071 +/- 0.054 (stat) +/- 0.007 (sys) +/- 0.002 (mix), A(FB)b ([square-root s] = 92.75 GeV) = 0. 1 31 +/- 0.047 (stat) +/- 0.012 (sys) +/- 0.004 (mix).