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Titolo:
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()
Autore:
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;
Indirizzi:
BRUNEL UNIV UXBRIDGE UB8 3PH MIDDX ENGLAND UNIV BOLOGNA,DIPARTIMENTO FIS I-40126 BOLOGNA ITALY UNIV BONN,INST PHYS D-53115 BONN 1 GERMANY UNIV CALIF RIVERSIDE,DEPT PHYS RIVERSIDE CA 92521 CARLETON UNIV,DEPT PHYS OTTAWA K1S 5B6 ONTARIO CANADA CARLETON UNIV,CTR RES PARTICLE PHYS OTTAWA K1S 5B6 ONTARIO 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 ALBERT LUDWIGS UNIV,FAK PHYS D-79104 FREIBURG GERMANY UNIV HEIDELBERG,INST PHYS D-69120 HEIDELBERG GERMANY INDIANA UNIV,DEPT PHYS BLOOMINGTON IN 47405 UNIV LONDON,QUEEN MARY & WESTFIELD COLL LONDON E1 4NS ENGLAND UNIV LONDON BIRKBECK COLL LONDON WC1E 7HU ENGLAND UNIV LONDON UNIV COLL LONDON WC1E 6BT ENGLAND UNIV MANCHESTER,DEPT PHYS,SCHUSTER LAB MANCHESTER M13 9PL LANCS ENGLAND UNIV MARYLAND,DEPT PHYS COLL PK MD 20742 UNIV MONTREAL,PHYS NUCL LAB MONTREAL H3C 3J7 QUEBEC CANADA UNIV OREGON,DEPT PHYS EUGENE OR 97403 RUTHERFORD APPLETON LAB DIDCOT OX11 0QX OXON ENGLAND SPP,DAPNIA 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 WEIZMANN INST SCI,DEPT NUCL PHYS IL-76100 REHOVOT ISRAEL UNIV HAMBURG,DESY,INST EXPTL PHYS 2 D-22607 HAMBURG 52 GERMANY UNIV VICTORIA,DEPT PHYS VICTORIA V8W 3P6 BC CANADA UNIV BRITISH COLUMBIA,DEPT PHYS VANCOUVER V6T 121 BC CANADA UNIV ALBERTA,DEPT PHYS EDMONTON T6G 2N5 AB CANADA DUKE UNIV,DEPT PHYS DURHAM NC 27708 UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM B15 2TT W MIDLANDS ENGLAND INFN I-40126 BOLOGNA ITALY UNIV CAMBRIDGE,CAVENDISH LAB CAMBRIDGE CB3 0HE ENGLAND
Titolo Testata:
Zeitschrift fur Physik. C, Particles and fields
fascicolo: 1, volume: 60, anno: 1993,
pagine: 19 - 35
SICI:
0170-9739(1993)60:1<19:TFAOE->2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
LUND MONTE-CARLO; JET FRAGMENTATION; E+E-PHYSICS; UPDATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
P.D. 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

Abstract

The forward-backward asymmetries of e+e- --> Z0 --> bbBAR and e+e- --> Z0 --> ccBAR have been measured by the OPAL Collaboration using samples of hadronic Z0 decays in which electron or muon candidates were observed. The asymmetries were measured simultaneously in a two parameter fit, which used the distributions of the track momentum and transverse momentum component with respect to the associated jet to distinguish lepton candidates from different sources. From a sample of 360 000 hadronic events with centre-of-mass energies within +/- 0.5 GeV of the Z0 mass and mean energy 91.24 GeV, the values obtained for the bbBAR asymmetry 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) +/- 0.007 (sys) +/- 0.003 (mix), A(FB)c = 0.014 +/- 0.030 (stat) +/- 0.020 (sys). The measurement of the bbBAR asymmetry Is confirmed by a measurement using only leptons with high transverse momentum. This sample is highly 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 correcting for the effect of B0B0 mixing, the results are: A(FB)b ([square-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).

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Documento generato il 19/01/20 alle ore 09:38:05