Measurement Of The Forward-Backward Asymmetry In The Distribution Of Leptons In T(T)Over-Bar Events In The Lepton Plus Jets Channel V M Abazov , Brad Abbott , B S Acharya , Mark D Adams , T Adams , J P Agnew , G D Alexeev , G Alkhazov , A Alton , A Askew , Stephen Atkins , K Augsten , C Avila , F Badaud , L Bagby , B Baldin , D V Bandurin , Sunanda Banerjee , E Barberis , P Baringer , J F Bartlett , U Bassler , V E Bazterra , A Bean , M Begalli , L Bellantoni , S B Beri , G Bernardi , R Bernhard , I Bertram , M Besancon , R Beuselinck , P C Bhat , Sudeep Bhatia , V Bhatnagar , G Blazey , S Blessing , K Bloom , A Boehnlein , D Boline , E E Boos , G Borissov , M Borysova , A Brandt , Oleg Brandt , R Brock , A Bross , D N Brown , X B Bu , M Buehler , V Buescher , V Bunichev , S Burdin , C P Buszello , E Camachoperez , B C K Casey , H Castillavaldez , S Caughron , S Chakrabarti , K M Chan , A Chandra , A Chapelain , E Chapon , Guoming Chen , Sung Won Cho , S Choi , B Choudhary , S Cihangir , D Claes , J Clutter , M Cooke , W E Cooper , M Corcoran , F Couderc , M C Cousinou , D Cutts , Aloke Das , Gideon J Davies , S J De Jong , E De La Cruzburelo , F Deliot , R Demina , D Denisov , S P Denisov , S Desai , C Deterre , K Devaughan , H T Diehl , M Diesburg , P F Ding , A Dominguez , A K Dubey , L V Dudko , A Duperrin , S Dutt , M Eads , D Edmunds , J Ellison , V D Elvira , Y Enari , H Evans , V N Evdokimov , Adam Falkowski , Lin Feng , T Ferbel , F Fiedler , F Filthaut , W Fisher , H E Fisk , M Fortner , H Fox , S Fuess , P H Garbincius , A Garciabellido , J A Garciagonzalez , V Gavrilov , W Geng , C E Gerber , Y Gershtein , G Ginther , G Golovanov , P D Grannis , S Greder , H Greenlee , G Grenier , Ph Gris , J F Grivaz , A Grohsjean , S Gruenendahl , M W Gruenewald , T Guillemin , G Gutierrez , P Gutierrez , J Haley , L Han , K Harder , A Harel , J M Hauptman , J Hays , T Head , T Hebbeker , D Hedin , Hatim Hegab , A P Heinson , U Heintz , C Hensel , I Herediade La Cruz , K Herner , G Hesketh , M D Hildreth , R Hirosky , T Hoang , J D Hobbs , B Hoeneisen , J Hogan , M Hohlfeld , J L Holzbauer , I Howley , Z Hubacek , V Hynek , I Iashvili , Y Ilchenko , R Illingworth , A S Ito , S Jabeen , M Jaffre , A Jayasinghe , Mi Sook Jeong , R Jesik , Peng Jiang , K Johns , Eugene M Johnson , Marvin Johnson , A Jonckheere , P Jonsson , J B Joshi , A W Jung , A Juste , E Kajfasz , D Karmanov , I Katsanos , R Kehoe , S Kermiche , N Khalatyan , A Khanov , A Kharchilava , Y N Kharzheev , I Kiselevich , J M Kohli , A V Kozelov , J Kraus , A Kumar , A Kupco , T Kurca , V A Kuzmin , S Lammers , P Lebrun , Hong Sik Lee , S W Lee , W M Lee , X Lei , J Lellouch , D Li , Huacheng Li , Lijuan Li , Q Z Li , Jae Kyu Lim , D Lincoln , J Linnemann , V V Lipaev , R Lipton , Huiyu Liu , Yaping Liu , A Lobodenko , M Lokajicek , R Lopes De Sa , R Lunagarcia , A L Lyon , A K A Maciel , R Madar , R Maganavillalba , Sudhir Malik , V L Malyshev , J Mansour , J Martinezortega , R Mccarthy , C L Mcgivern , M M Meijer , A Melnitchouk , D Menezes , P G Mercadante , M Merkin , A Meyer , J Meyer , F Miconi , N K Mondal , M Mulhearn , E Nagy , M Narain , R Nayyar , H A Neal , J P Negret , P Neustroev , H T Nguyen , T Nunnemann , D Orbaker , J Orduna , N Osman , J Osta , A Pal , N Parashar , V Parihar , S K Park , R Partridge , N Parua , A Patwa , B Penning , M Perfilov , Y Peters , K Petridis , G Petrillo , P Petroff , M A Pleier , V M Podstavkov , A V Popov , M Prewitt , D Price , N Prokopenko , J Qian , A Quadt , B Quinn , P N Ratoff , I Razumov , I Rippbaudot , F Rizatdinova , M Rominsky , A J Ross , C Royon , P Rubinov , R Ruchti , G Sajot , A Sanchezhernandez , M P Sanders , A S Santos , G Savage , L Sawyer , T Scanlon , R D Schamberger , Y Scheglov , H Schellman , C Schwanenberger , R Schwienhorst , J Sekaric , H Severini , E Shabalina , V Shary , S Shaw , A A Shchukin , V Simak , P Skubic , P Slattery , D Smirnov , G R Snow , J Snow , S Snyder , S Soeldnerrembold , L Sonnenschein , K Soustruznik , Jan Stark , D A Stoyanova , M Strauss , L Suter , P Svoisky , M Titov , V V Tokmenin , Y T Tsai , D Tsybychev , B Tuchming , C Tully , L Uvarov , S Uvarov , S Uzunyan , R Van Kooten , W M Van Leeuwen , N Varelas , E W Varnes , I A Vasilyev , A Y Verkheev , L S Vertogradov , M Verzocchi , M Vesterinen , D Vilanova , P Vokac , H D Wahl , M H L S Wang , J Warchol , G Watts , M Wayne , J Weichert , L Weltyrieger , M R J Williams , G W Wilson , M Wobisch , D R Wood , T R Wyatt , Yanling Xie , R Yamada , Shizhong Yang , T Yasuda , Y A Yatsunenko , W Ye , Zaiyuan Ye , Huiyong Yin , K Yip , S W Youn , J M Yu , J Zennamo , T G Zhao , Bo Zhou , Junming Zhu , M Zielinski , D Zieminska , L Zivkovic PHYSICAL REVIEW D（2014）
摘要
We present measurements of the forward-backward asymmetry in the angular distribution of leptons from decays of top quarks and antiquarks produced in proton-antiproton collisions. We consider the final state containing a lepton and at least three jets. The entire sample of data collected by the D0 experiment during Run II of the Fermilab Tevatron Collider, corresponding to 9.7 fb(-1) of integrated luminosity, is used. The asymmetry measured for reconstructed leptons is A(FB)(l) = (2.9 +/- 2.1(stat.)(-1.7)(+1.5) (syst.))%. When corrected for efficiency and resolution effects within the lepton rapidity coverage of vertical bar y(l)vertical bar < 1.5, the asymmetry is found to be A(FB)(l) = (4.2 +/- 2.3(stat.)(-2.0)(+1.7) (syst.))%. We examine the dependence of A(FB)(l) on the transverse momentum and rapidity of the lepton. Combination with the asymmetry measured in the final states containing two leptons yields A(FB)(l) = (4.2 +/- 2.0(stat.) +/- 1.4(syst.))%. The results are in agreement with predictions from the next-to-leading-order QCD generator MC@NLO, which predicts an asymmetry of A(FB)(l) = 2.0% for vertical bar y(l)vertical bar < 1.5.
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