THE FORWARD-BACKWARD ASYMMETRY FOR CHARM QUARKS AT THE Z

Authors
BARATE R BUSKULIC D DECAMP D GHEZ P GOY C LEES JP LUCOTTE A MERLE E MINARD MN NIEF JY PIETRZYK B ALEMANY R BOIX G CASADO MP CHMEISSANI M CRESPO JM DELFINO M FERNANDEZ E FERNANDEZBOSMAN M GARRIDO L GRAUGES E JUSTE A MARTINEZ M MERINO G MIQUEL R MIR LM PARK IC PASCUAL A RIU I SANCHEZ F COLALEO A CREANZA D DEPALMA M GELAO G IASELLI G MAGGI G MAGGI M 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 BECKER U BRIGHTTHOMAS P CASPER D CATTANEO M CERUTTI F CIULLI V DISSERTORI G DREVERMANN H FORTY RW FRANK M HAGELBERG R HALLEY AW HANSEN JB HARVEY J JANOT P JOST B LEHRAUS I MATO P MINTEN A MONETA L PACHECO A RANJARD F ROLANDI L ROUSSEAU D SCHLATTER D SCHMITT M SCHNEIDER O TEJESSY W TEUBERT F TOMALIN IR WACHSMUTH H AJALTOUNI Z BADAUD F CHAZELLE G DESCHAMPS O 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 HANSEN JD HANSEN JR HANSEN PH NILSSON BS RENSCH B WAANANEN A DASKALAKIS G KYRIAKIS A MARKOU C SIMOPOULOU E SIOTIS I VAYAKI A BLONDEL A BONNEAUD G BRIENT JC BOURDON P ROUGE A RUMPF M VALASSI A VERDERI M VIDEAU H FOCARDI E PARRINI G ZACHARIADOU K CORDEN M GEORGIOPOULOS C JAFFE DE ANTONELLI A BENCIVENNI G BOLOGNA G BOSSI F CAMPANA P CAPON G CHIARELLA V FELICI G LAURELLI P MANNOCCHI G MURTAS F MURTAS GP PASSALACQUA L PEPEALTARELLI M CURTIS L LYNCH JG NEGUS P OSHEA V RAINE C SCARR JM SMITH K TEIXEIRADIAS P THOMPSON AS THOMSON E BUCHMULLER O DHAMOTHARAN S GEWENIGER C GRAEFE G HANKE P HANSPER G HEPP V KLUGE EE PUTZER A SOMMER J TITTEL K WERNER S WUNSCH M BEUSELINCK R BINNIE DM CAMERON W DORNAN PJ GIRONE M GOODSIR S MARTIN EB MARINELLI N MOUTOUSSI A NASH J SEDGBEER JK SPAGNOLO P WILLIAMS MD GHETE VM GIRTLER P KNERINGER E KUHN D RUDOLPH G BETTERIDGE AP BOWDERY CK BUCK PG COLRAIN P CRAWFORD G FINCH AJ FOSTER F HUGHES G JONES RWL ROBERTSON NA WILLIAMS MI GIEHL I 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 CARR J COYLE P ETIENNE F LEROY O MOTSCH F PAYRE P TALBY M SADOUKI A THULASIDAS M TRABELSI K ALEPPO M ANTONELLI M RAGUSA F BERLICH R BUSCHER V COWAN G DIETL H GANIS G LUTJENS G MANNERT C MANNER W MOSER HG SCHAEL S SETTLES R SEYWERD H STENZEL H WIEDENMANN W WOLF G BOUCROT J CALLOT O CHEN S CORDIER A DAVIER M DUFLOT L GRIVAZ JF HEUSSE P HOCKER A JACHOLKOWSKA A KIM DW LEDIBERDER F LEFRANCOIS J LUTZ AM SCHUNE MH TOURNEFIER E VEILLET JJ VIDEAU I ZERWAS D AZZURRI P BAGLIESI G BATIGNANI G BETTARINI S BOCCALI T BOZZI C CALDERINI G CARPINELLI M CIOCCI MA DELLORSO R FANTECHI R FERRANTE I FOA L FORTI F GIASSI A GIORGI MA GREGORIO A LIGABUE F LUSIANI A MARROCCHESI PS MESSINEO A PALLA F RIZZO G SANGUINETTI G SCIABA A SGUAZZONI G TENCHINI R TONELLI G VANNINI C VENTURI A VERDINI PG BLAIR GA BRYANT LM CHAMBERS JT GREEN MG MEDCALF T PERRODO P STRONG JA VONWIMMERSPERGTOELLER JH BOTTERILL DR CLIFFT RW EDGECOCK TR NORTON PR THOMPSON JC WRIGHT AE BOCHDEVAUX 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 KONSTANTINIDIS N LITKE AM MCNEIL MA TAYLOR G BOOTH CN CARTWRIGHT S COMBLEY F KELLY MS LEHTO M THOMPSON LF AFFHOLDERBACH K BOHRER A BRANDT S GRUPEN C SARAIVA P SMOLIK L STEPHAN F GIANNINI G GOBBO B MUSOLINO G ROTHBERG J WASSERBAECH S ARMSTRONG SR CHARLES E ELMER P FERGUSON DPS GAO Y 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 ZOBERNIG G
Citation
R. Barate et al., THE FORWARD-BACKWARD ASYMMETRY FOR CHARM QUARKS AT THE Z, Physics letters. Section B, 434(3-4), 1998, pp. 415-425
Citations number
12
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
434
Issue
3-4
Year of publication
1998
Pages
415 - 425
Database
ISI
SICI code
0370-2693(1998)434:3-4<415:TFAFCQ>2.0.ZU;2-2
Abstract
The data set collected with the ALEPH detector from 1991 to 1995 at LE P has been analysed to measure the charm forward-backward asymmetry at the Z. Out of a total of 4.1 million hadronic Z decays, about 36000 h igh momentum D+ D+ and D-0 decays were reconstructed, of which 80% or iginate from Z --> <c(c)over bar> events. The forward-backward asymmet ry was measured at three energy points: A(FB)(c)(root s = 89.37 GeV) = (-1.0 +/- 4.4)% A(FB)(c)(root s = 91.22 GeV) = (6.3 +/- 1.0)% A(FB)(c )(root s = 92.96 GeV) = (11.0 +/- 3.4)%. From this analysis, a value o f the effective electroweak mixing angle sin(2)theta(W)(eff) = 0.2321 +/- 0.0016 is extracted. (C) 1998 Elsevier Science B.V. All rights res erved.