Measurement Of The Forward-Backward Asymmetry Of Charm And Bottom Quarks At The Z-Pole Using D-Asterisk(+/-)-Mesons P Abreu , W Adam , T Adye , E Agasi , I Ajinenko , R Aleksan , Gd Alekseev , Pp Allport , S Almehed , Fml Almeida , Sj Alvsvaag , U Amaldi , A Andreazza , Ml Andrieux , P Antilogus , Wd Apel , Y Arnoud , B Asman , Je Augustin , A Augustinus , P Baillon , P Bambade , F Barao , R Barate , Dy Bardin , Gj Barker , A Baroncelli , O Barring , Ja Barrio , W Bartl , Mj Bates , M Battaglia , M Baubillier , J Baudot , Kh Becks , M Begalli , P Beilliere , Y Belokopytov , P Beltran , Ac Benvenuti , M Berggren , D Bertrand , F Bianchi , M Bigi , Ms Bilenky , P Billoir , J Bjarne , D Bloch , M Blume , S Blyth , V Bocci , T Bolognese , M Bonesini , W Bonivento , Psl Booth , G Borisov , C Bosio , B Bostjancic , S Bosworth , O Botner , B Bouquet , C Bourdarios , Tjv Bowcock , M Bozzo , P Branchini , Kd Brand , Ra Brenner , H Briand , C Bricman , L Brillault , Rca Brown , P Bruckman , Jm Brunet , L Bugge , T Buran , A Buys , M Caccia , M Calvi , Ajc Rozas , T Camporesi , V Canale , M Canepa , K Cankocak , F Cao , F Carena , P Carrilho , L Carroll , V Caso , Mvc Gimenez , A Cattai , Fr Cavallo , L Cerrito , V Chabaud , A Chan , P Charpentier , L Chaussard , J Chauveau , P Checchia , Ga Chelkov , P Chliapnikov , P Chochula , V Chorowicz , Jtm Chrin , V Cindro , P Collins , Jl Contreras , R Contri , E Cortina , G Cosme , F Cossutti , F Couchot , Hb Crawley , D Crennell , G Crosetti , Jc Maestro , S Czellar , E Dahljensen , J Dahm , B Dalmagne , M Dam , G Damgaard , A Daum , Pd Dauncey , M Davenport , W Dasilva , C Defoix , G Dellaricca , P Delpierre , N Demaria , A Deangelis , H Deboeck , W Deboer , S Debrabandere , C Declercq , Mdmd Laso , Cd Vaissiere , B Delotto , A Demin , L Depaula , C Desaintjean , H Dijkstra , L Diciaccio , F Djama , J Dolbeau , M Donszelmann , K Doroba , M Dracos , J Drees , Ka Drees , M Dris , Y Dufour , F Dupont , D Edsall , R Ehret , T Ekelof , G Ekspong , M Elsing , Jp Engel , N Ershaidat , Me Santo , D Fassouliotis , M Feindt , A Fenyuk , A Ferrer , Ta Filippas , A Firestone , H Foeth , E Fokitis , F Fontanelli , F Formenti , Jl Fousset , B Franek , P Frenkiel , Dc Fries , Ag Frodesen , R Fruhwirth , F Fuldaquenzer , H Furstenau , J Fuster , D Gamba , M Gandelman , C Garcia , J Garcia , C Gaspar , U Gasparini , P Gavillet , En Gazis , D Gele , Jp Gerber , D Gillespie , R Gokieli , B Golob , Jjgy Cadenas , G Gopal , L Gorn , M Gorski , V Gracco , F Grard , E Graziani , G Grosdidier , , J Guy , U Haedinger , F Hahn , M Hahn , S Hahn , S Haider , Z Hajduk , A Hakansson , A Hallgren , K Hamacher , W Hao , Fj Harris , V Hedberg , R Henriques , Jj Hernandez , Ja Hernando , P Herquet , H Herr , Tl Hessing , E Higon , Hj Hilke , Ts Hill , So Holmgren , Pj Holt , D Holthuizen , Pf Honore , M Houlden , J Hrubec , K Huet , K Hultqvist , P Ioannou , Ps Iversen , Jn Jackson , R Jacobsson , P Jalocha , R Janik , G Jarlskog , P Jarry , B Jeanmarie , Ek Johansson , L Jonsson , P Juillot , M Kaiser , G Kalmus , F Kapusta , M Karlsson , E Karvelas , A Katargin , S Katsanevas , Ec Katsoufis , R Keranen , Ba Khomenko , Nn Khovanski , B King , Nj Kjaer , H Klein , A Klovning , P Kluit , Jh Koehne , B Koene , P Kokkinias , M Koratzinos , V Kostioukhine , C Kourkoumelis , O Kouznetsov , Ph Kramer , M Krammer , C Kreuter , J Krolikowski , I Kronkvist , Z Krumstein , W Krupinski , P Kubinec , W Kucewicz , K Kulka , K Kurvinen , C Lacasta , I Laktineh , C Lambropoulos , Jw Lamsa , L Lanceri , P Langefeld , V Lapin , I Last , Jp Laugier , R Lauhakangas , G Leder , F Ledroit , V Lefebure , R Leitner , Ncy Lemoigne , J Lemonne , G Lenzen , V Lepeltier , T Lesiak , Jm Levy , D Liko , R Lindner , A Lipniacka , I Lippi , B Loerstad , M Lokajicek , Jg Loken , A Lopezfernandez , Mal Aguera , D Loukas , Jj Lozano , P Lutz , L Lyons , G Maehlum , J Maillard , A Maio , A Maltezos , V Malychev , F Mandl , J Marco , B Marechal , M Margoni , Jc Marin , C Mariotti , A Markou , T Maron , C Martinezrivero , F Martinezvidal , Smi Garcia , F Matorras , C Matteuzzi , G Matthiae , M Mazzucato , M Mccubbin , R Mckay , R Mcnulty , J Medbo , C Meroni , Wt Meyer , M Michelotto , E Migliore , I Mikulec , L Mirabito , Wa Mitaroff , U Mjoernmark , T Moa , R Moeller , K Moenig , Mr Monge , P Morettini , H Mueller , Wj Murray , B Muryn , G Myatt , F Naraghi , Fl Navarria , S Navas , P Negri , S Nemecek , W Neumann , N Neumeister , R Nicolaidou , Bs Nielsen , V Nikolaenko , P Niss , A Nomerotski , A Normand , W Oberschultebeckmann , V Obraztsov , Ag Olshevski , R Orava , K Osterberg , A Ouraou , P Paganini , M Paganoni , R Pain , H Palka , Td Papadopoulou , L Pape , F Parodi , A Passeri , M Pegoraro , J Pennanen , L Peralta , V Perevozchikov , H Pernegger , A Perrotta , C Petridou , A Petrolini , Ht Phillips , G Piana , F Pierre , M Pimenta , S Plaszczynski , O Podobrin , Me Pol , G Polok , P Poropat , V Pozdniakov , M Prest , P Privitera , A Pullia , D Radojicic , S Ragazzi , H Rahmani , J Rames , Pn Ratoff , Al Read , M Reale , P Rebecchi , Ng Redaelli , M Regler , D Reid , Pb Renton , Lk Resvanis , F Richard , J Richardson , J Ridky , G Rinaudo , I Ripp , A Romero , I Roncagliolo , P Ronchese , V Ronjin , L Roos , Ej Rosenberg , E Rosso , P Roudeau , T Rovelli , W Ruckstuhl , V Ruhlmannkleider , A Ruiz , H Saarikko , Y Sacquin , A Sadovsky , G Sajot , J Salt , J Sanchez , M Sannino , H Schneider , Mae Schyns , G Sciolla , F Scuri , Y Sedykh , Am Segar , A Seitz , R Sekulin , Rc Shellard , I Siccama , P Siegrist , S Simonetti , F Simonetto , An Sisakian , B Sitar , Tb Skaali , G Smadja , N Smirnov , O Smirnova , Gr Smith , R Sosnowski , D Souzasantos , T Spassov , E Spiriti , S Squarcia , H Staeck , C Stanescu , S Stapnes , I Stavitski , G Stavropoulos , K Stepaniak , F Stichelbaut , A Stocchi , J Strauss , R Strub , B Stugu , M Szczekowski , M Szeptycka , T Tabarelli , O Tchikilev , Ge Theodosiou , Z Thome , A Tilquin , J Timmermans , Lg Tkatchev , T Todorov , Dz Toet , A Tomaradze , B Tome , E Torassa , L Tortora , G Transtromer , D Treille , W Trischuk , G Tristram , C Troncon , A Tsirou , Ml Turluer , T Tuuva , Ia Tyapkin , M Tyndel , S Tzamarias , B Ueberschaer , S Ueberschaer , O Ullaland , G Valenti , E Vallazza , Jav Ferrer , C Vandervelde , Gw Vanapeldoorn , P Vandam , Wk Vandoninck , J Vaneldik , G Vegni , L Ventura , W Venus , F Verbeure , M Verlato , Ls Vertogradov , D Vilanova , P Vincent , L Vitale , E Vlasov , As Vodopyanov , M Voutilainen , V Vrba , H Wahlen , C Walck , F Waldner , A Wehr , M Weierstall , P Weilhammer , Am Wetherell , D Wicke , Jh Wickens , M Wielers , Gr Wilkinson , Wsc Williams , M Winter , M Witek , G Wormser , K Woschnagg , K Yip , O Yushchenko , F Zach , A Zaitsev , A Zalewska , P Zalewski , D Zavrtanik , E Zevgolatakos , Ni Zimin , M Zito , D Zontar , R Zuberi , Gc Zucchelli , G Zumerle ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS（1995）
摘要
The forward-backward asymmetries for the processes e(+)e(-) --> c (c) over bar and e(+)e(-) --> b (b) over bar 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 degrees pi(+) decays are reconstructed. The c and b quark forward-backward asymmetries are determined to be: A(FB)(c (c) over bar) = 0.077 +/- 0.029 (stat) +/- 0.012 (sys), A(FB)(b (b) over bar) = 0.059 +/- 0.062 (stat) +/- 0.025 (sys). Constraining the b asymmetry to the value measured by DELPHI using independent analyses, the charm asymmetry is determined to be: A(FB)(c,const) = 0.068 +/- 0.027 (stat) +/- 0.011 (sys). This result corresponds to an effective electroweak mixing angle measured using charm quark events of: sin2 theta(eff)(lept) = 0.2307 +/- 0.0062 (stat) +/- 0.0026 (sys).
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Field Theory, Elementary Particle, Quantum Field Theory, Particle Acceleration, Independent Analysis
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