在√s = 1.96 TeV的质子-反质子碰撞中测量B（±）介子产生的前后不对称性。
Measurement of the forward-backward asymmetry in the production of B(±) mesons in pp̄ collisions at √s=1.96 TeV.
作者信息
Abazov V M, Abbott B, Acharya B S, Adams M, Adams T, Agnew J P, Alexeev G D, Alkhazov G, Alton A, Askew A, Atkins S, Augsten K, Avila C, Badaud F, Bagby L, Baldin B, Bandurin D V, Banerjee S, Barberis E, Baringer P, Bartlett J F, Bassler U, Bazterra V, Bean A, Begalli M, Bellantoni L, Beri S B, Bernardi G, Bernhard R, Bertram I, Besançon M, Beuselinck R, Bhat P C, Bhatia S, Bhatnagar V, Blazey G, Blessing S, Bloom K, Boehnlein A, Boline D, Boos E E, Borissov G, Borysova M, Brandt A, Brandt O, Brock R, Bross A, Brown D, Bu X B, Buehler M, Buescher V, Bunichev V, Burdin S, Buszello C P, Camacho-Pérez E, Casey B C K, Castilla-Valdez H, Caughron S, Chakrabarti S, Chan K M, Chandra A, Chapon E, Chen G, Cho S W, Choi S, Choudhary B, Cihangir S, Claes D, Clutter J, Cooke M, Cooper W E, Corcoran M, Couderc F, Cousinou M-C, Cutts D, Das A, Davies G, de Jong S J, De La Cruz-Burelo E, Déliot F, Demina R, Denisov D, Denisov S P, Desai S, Deterre C, DeVaughan K, Diehl H T, Diesburg M, Ding P F, Dominguez A, Dubey A, Dudko L V, Duperrin A, Dutt S, Eads M, Edmunds D, Ellison J, Elvira V D, Enari Y, Evans H, Evdokimov V N, Fauré A, Feng L, Ferbel T, Fiedler F, Filthaut F, Fisher W, Fisk H E, Fortner M, Fox H, Fuess S, Garbincius P H, Garcia-Bellido A, García-González J A, Gavrilov V, Geng W, Gerber C E, Gershtein Y, Ginther G, Gogota O, Golovanov G, Grannis P D, Greder S, Greenlee H, Grenier G, Gris Ph, Grivaz J-F, Grohsjean A, Grünendahl S, Grünewald M W, Guillemin T, Gutierrez G, Gutierrez P, Haley J, Han L, Harder K, Harel A, Hauptman J M, Hays J, Head T, Hebbeker T, Hedin D, Hegab H, Heinson A P, Heintz U, Hensel C, Heredia-De La Cruz I, Herner K, Hesketh G, Hildreth M D, Hirosky R, Hoang T, Hobbs J D, Hoeneisen B, Hogan J, Hohlfeld M, Holzbauer J L, Howley I, Hubacek Z, Hynek V, Iashvili I, Ilchenko Y, Illingworth R, Ito A S, Jabeen S, Jaffré M, Jayasinghe A, Jeong M S, Jesik R, Jiang P, Johns K, Johnson E, Johnson M, Jonckheere A, Jonsson P, Joshi J, Jung A W, Juste A, Kajfasz E, Karmanov D, Katsanos I, Kaur M, Kehoe R, Kermiche S, Khalatyan N, Khanov A, Kharchilava A, Kharzheev Y N, Kiselevich I, Kohli J M, Kozelov A V, Kraus J, Kumar A, Kupco A, Kurča T, Kuzmin V A, Lammers S, Lebrun P, Lee H S, Lee S W, Lee W M, Lei X, Lellouch J, Li D, Li H, Li L, Li Q Z, Lim J K, Lincoln D, Linnemann J, Lipaev V V, Lipton R, Liu H, Liu Y, Lobodenko A, Lokajicek M, Lopes de Sa R, Luna-Garcia R, Lyon A L, Maciel A K A, Madar R, Magaña-Villalba R, Malik S, Malyshev V L, Mansour J, Martínez-Ortega J, McCarthy R, McGivern C L, Meijer M M, Melnitchouk A, Menezes D, Mercadante P G, Merkin M, Meyer A, Meyer J, Miconi F, Mondal N K, Mulhearn M, Nagy E, Narain M, Nayyar R, Neal H A, Negret J P, Neustroev P, Nguyen H T, Nunnemann T, Orduna J, Osman N, Osta J, Pal A, Parashar N, Parihar V, Park S K, Partridge R, Parua N, Patwa A, Penning B, Perfilov M, Peters Y, Petridis K, Petrillo G, Pétroff P, Pleier M-A, Podstavkov V M, Popov A V, Prewitt M, Price D, Prokopenko N, Qian J, Quadt A, Quinn B, Ratoff P N, Razumov I, Ripp-Baudot I, Rizatdinova F, Rominsky M, Ross A, Royon C, Rubinov P, Ruchti R, Sajot G, Sánchez-Hernández A, Sanders M P, Santos A S, Savage G, Savitskyi M, Sawyer L, Scanlon T, Schamberger R D, Scheglov Y, Schellman H, Schwanenberger C, Schwienhorst R, Sekaric J, Severini H, Shabalina E, Shary V, Shaw S, Shchukin A A, Simak V, Skubic P, Slattery P, Smirnov D, Snow G R, Snow J, Snyder S, Söldner-Rembold S, Sonnenschein L, Soustruznik K, Stark J, Stoyanova D A, Strauss M, Suter L, Svoisky P, Titov M, Tokmenin V V, Tsai Y-T, Tsybychev D, Tuchming B, Tully C, Uvarov L, Uvarov S, Uzunyan S, Van Kooten R, van Leeuwen W M, Varelas N, Varnes E W, Vasilyev I A, Verkheev A Y, Vertogradov L S, Verzocchi M, Vesterinen M, Vilanova D, Vokac P, Wahl H D, Wang M H L S, Warchol J, Watts G, Wayne M, Weichert J, Welty-Rieger L, Williams M R J, Wilson G W, Wobisch M, Wood D R, Wyatt T R, Xie Y, Yamada R, Yang S, Yasuda T, Yatsunenko Y A, Ye W, Ye Z, Yin H, Yip K, Youn S W, Yu J M, Zennamo J, Zhao T G, Zhou B, Zhu J, Zielinski M, Zieminska D, Zivkovic L
机构信息
Joint Institute for Nuclear Research, Dubna, Russia.
University of Oklahoma, Norman, Oklahoma 73019, USA.
出版信息
Phys Rev Lett. 2015 Feb 6;114(5):051803. doi: 10.1103/PhysRevLett.114.051803. Epub 2015 Feb 4.
We present a measurement of the forward-backward asymmetry in the production of B(±) mesons, A(FB)(B(±)), using B(±)→J/ψK(±) decays in 10.4 fb(-1) of pp̄ collisions at sqrt[s]=1.96 TeV collected by the D0 experiment during Run II of the Tevatron collider. A nonzero asymmetry would indicate a preference for a particular flavor, i.e., b quark or ̄b antiquark, to be produced in the direction of the proton beam. We extract A(FB)(B(±)) from a maximum likelihood fit to the difference between the numbers of forward- and backward-produced B(±) mesons. We measure an asymmetry consistent with zero: A(FB)(B(±))=[-0.24±0.41 (stat)±0.19 (syst)]%.
我们利用在Tevatron对撞机运行II期间D0实验收集的(\sqrt{s}=1.96) TeV的(pp̄)对撞中10.4 (fb^{-1})的数据，通过(B(±)→J/ψK(±))衰变测量(B(±))介子产生中的前后不对称性(A_{FB}(B(±)))。非零不对称性将表明在质子束方向上更倾向于产生特定味，即(b)夸克或(\bar{b})反夸克。我们从对前后产生的(B(±))介子数量之差的最大似然拟合中提取(A_{FB}(B(±)))。我们测量到的不对称性与零相符：(A_{FB}(B(±)) = [-0.24±0.41 (统计)±0.19 (系统)]%) 。
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