Measurement of the forward-backward asymmetry of charm and bottom quarks at the $Z$ pole using \(D^{*^\pm}\) mesons
P. Abreu,W. Adam,T. Adye,E. Agasi,I. Ajinenko,R. Aleksan,G. D. Alekseev,P. P. Allport,S. Almehed,F. M. L. Almeida,S. J. Alvsvaag,U. Amaldi,A. Andreazza,M. L. Andrieux,P. Antilogus,Y. Arnoud,J-E. Augustin,A. Augustinus,P. Bambade j,F. Barao,R. Baxate,D. Y. Bardin,G. J. Barker,A. Baroncelli,J. A. Barrio,W. Bart,M. J. Bates,M. Battaglia,M. Baubillier,J. Baudot,K-H. Becks,M. Begalli,P. Beilliere,P. Beltran,A. C. Benvenuti,M. Berggren,D. Bertrand,F. Bianchi,M. Bigi,M. S. Bilenky,P. Billoir,J. Bjarne,D. Bloch,M. Blume,S. Blyth,V. Bocci,T. Bolognese,M. Bonesini,W. Bonivento,P. S. L. Booth,G. Borisov,C. Bosio,B. Bostjancic,S. Bosworth,O. Botner,B. Bouquet,C. Bourdarios,T. J. V. Bowcock,J M.Bozzo,P. Branchini,K. D. Brand,R. A. Brenner,H. Briand,C. Bricman,L. Brillault,P. Bruckman,J-M. Brunet,L. Bugge,T. Buran,M. Caccia,M. Calvi,A. J. Camacho,Rozas,T. Camporesi,V. Canale,M. Canepa,K. Cankocak,F. Cao,F. Carena,P. Carrilho,L. Carrol,C. Caso j,V. Cassio,M. V. Castillo Gimenez,F. R. Cavallo,L. Cerrito,L. Chaussard,J. Chauveau,P. Checchia,G. A. Chelkov,P. Chliapnikov,P. Chochula,J. T. M. Chrin,P. Collins,J. L. Contreras,R. Contri,E. Cortina,G. Cosme,F. Cossutti,F. Couchot,H. B. Crawley,D. Crennell,G. Crosetti,J. Cuevas Maestro,S. Czellar,E. Dahl-Jensen,J. Dahm,B. Dalmagne,M. Dam,G. Damgaard,A. Daum,P. D. Dauncey,M. Davenport,W. Da,Silva,C. Defoix,G. Dellaricca,G. Della Ricca,P. Delpierre,N. Demaria,H. De Boeck,W. De Boer,S. De Brabandere,C. De Clercq,M. D. M. De Fez Laso,B. De Lotto,A. De Min,L. De Paula,C. De Saint-Jean,H. Dijkstra,L. Di Ciaccio,F. Djama,J. Dolbeau,M. Donszelmann,K. Doroba,M. Dracos,J. Drees,K.-A. Drees,M. Dris,Y. Dufour,T F.Dupont,R. Ehret,T. Ekelof,G. Ekspong,M. Elsing,J-P. Engel,N. Ershaidat,M. Espirito,Santo,D. Fassouliotis,A. Fenyuk,T. A. Filippas,H. Foeth,E. Fokitis,F. Fontanelli,J-L. Fousset,B. Franek,P. Frenkiel,D. C. Fries,A. G. Frodesen,R. Fruhwirth,F. Fulda-Quenzer,C. Garcia,J. Garcia,U. Gasparini,Ph. Gavillet,E. N. Gazis,D. Gele,J-P. Gerber,R. Gokieli,B. Golob,J. J. Gornez Y Cadenas,G. Gopal,M. Gorski,V. Gracco,F. Grard,E. Graziani,G. Grosdidier,P. Gunnarsson,J. Guy,U. Haedinger,F. Hahn,M. Hahn,S. Hahn,S. Haider,Z. Hajduk,A. Hakansson,A. Hallgren,K. Hamacher,W. Hao,F. J. Harris,V. Hedberg,R. Henriques,J. J. Hernandez,P. Herquet,E. Higon,H. J. Hilke,T. S. Hill,S-O. Holmgren,P. J. Holt,D. Holthuizen,P. F. Honore,M. Houlden,J. Hrubec,K. Huet,K. Hultqvist,P. Ioannou,P-S. Iversen,J. N. Jackson,R. Jacobsson,P. Jalocha,R. Janik,G. Jarlskog,P. Jarry,E. K. Johansson,L. Jonsson,P. Juillot,M. Kaiser,G. Kalmus,F. Kapusta,M. Karlsson,E. Karvelas,A. Katargin,S. Katsanevas,E. C. Katsoufis,R. Keranen,B. A. Khomenko,N. N. Khovanski,B. King,N. J. Kjaer,A. Klovning,P. Kluit,V. Kostioukhine,C. Kourkoumelis,O. Kouznetsov,M. Krammer,J. Krolikowski,I. Kronkvist,Z. Krumstein,W. Krupinski,P. Kubinec,W. Kucewicz,K. Kulka,K. Kurvinen,C. Lacasta,L. Lanceri,P. Langefeld,G. Leder,F. Ledroit,V. Lefebure,G. Lenzen,V. Lepeltier,T. Lesiak,J. M. Levy,D. Liko,A. Lipniacka,I. Lippi,B. Loerstad,J. G. Loken,G. Maehlum,J. Maillard,A. Maio,C. Mariotti,T. Maron,C. Martinez-Rivero,F. Martinez-Vidal,C. Matteuzzi,G. Matthiae,M. Mazzucato,J. Medbo,W. T. Meyer,M. Michelotto,E. Migliore,I. Mikulec,L. Mirabito,W. A. Mitaroff,T. Moa,R. Moeller,K. Moenig,W. J. Murray,B. Muryn,G. Myatt,F. Naraghi,F. L. Navarria,S. Navas,N. Neumeister,R. Nicolaidou,B. S. Nielsen,V. Nikolaenko,P. Niss,A. Nomerotski,A. Normand,W. Oberschulte-Beckmann,V. Obraztsov,K. Osterberg,F. Parodi,A. Passeri,L. Peralta,V. Perevozchikov,H. Pernegger,A. Perrotta,C. Petridou,O. Podobrin,G. Polok,P. Poropat,M. Prest,A. Pullia,D. Radojicic,S. Ragazzi
semanticscholar（2005）
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摘要
The forward-backward asymmetries for the processes e+e ---, e6 and e+e ~ bb at the Z resonance are measured using identified D *+ mesons. In 905,000 selected hadronic events, taken in 1991 and 1992 with the DELPHI detector at LEP, 4757 D *+ ~ D~ + decays are reconstructed. The e and b quark forward-backward asymmetries are determined to be: c6 AF/~ = 0.077 • 0.029 (stat) 40.012 (sys) , A~B = 0.059 40.062 (stat) 40.024 (sys) . Constraining the b asymmetry to the value measured by DELPHI using independent analyses, the charm asymmetry is determined to be: FB = 0.068 40.027 (stat) 40.011 (sys) . This result corresponds to an effective electroweak mixing angle measured using charm quark events of: sin ~ AZePt = 0.2307 40.0062 (stat) 40.0026 (sys)
