Measurement of Leptonic Asymmetries and Top Quark Polarization in ttbar Production

6533b82dfe1ef96bd1291faa

RESEARCH PRODUCT

Measurement of Leptonic Asymmetries and Top Quark Polarization in ttbar Production

Martin Grunewald G. Golovanov V. Simak Sabine Lammers Milos Lokajicek Darien Wood C. P. Buszello L. Welty-rieger D. Denisov Yuehong Xie S. Blessing Tiefu Zhao Pedro G Mercadante P. F. Ding Scott Snyder Mitchell Wayne H. Schellman J. M. Kohli Christophe Royon S. W. Youn Robert Hirosky Ruchika Nayyar Hal Evans Thomas Ferbel V. M. Abazov P. L.m. Podesta-lerma M. Prewitt Lars Sonnenschein Hang Yin Stefan Grünendahl Y. W. Liu V. Shary E. E. Boos H. D. Wahl Heriberto Castilla-valdez Brad Abbott T. Nunnemann N. Prokopenko B. Baldin L. Zivkovic M. Buehler Pierre Petroff J. K. Lim P. Lebrun P. Lebrun Anna Goussiou S. Bhatia S. J. De Jong A. Evdokimov M. M. Meijer G. Gutierrez Hongfang Liu B. Tuchming Philip Baringer S. Banerjee Y. T. Tsai Y. Ilchenko R. Van Kooten Jose Andres Garcia-gonzalez G. D. Alexeev G. A. García-guerra U. Bassler Elizaveta Shabalina T. Yasuda Flera Rizatdinova Aaron Dominguez S. Greder R. Illingworth K. Devaughan G. Grenier G. Grenier S. Cihangir Gregory R Snow R. Magaña-villalba S. W. Cho M. D. Corcoran Fabrice Couderc A. P. Heinson Iain Alexander Bertram D. Smirnov Ketino Kaadze Victor Daniel Elvira L. Han Andreas Werner Jung Marco Verzocchi H. Li W. M. Lee A. A. Shchukin Gianluca Petrillo Shabnam Jabeen M. A. Pleier Guennadi Borissov X. B. Bu Liang Li Frank Fiedler Andrew White Markus Wobisch A. Meyer A. Patwa E. Kajfasz J. Snow D. Karmanov D. Menezes Lev Dudko Nikos Varelas C. L. Mcgivern T. G. Zhao W. Ye J. Zennamo A. Dubey W. C. Yang Maxim Perfilov Terry Richard Wyatt I. Heredia-de La Cruz Sergey Burdin M. Eads S. P. Denisov S. Caughron Arnulf Quadt Bing Zhou R. K. Shivpuri S. Kulikov Zdenek Hubacek Raymond Brock Marcia Begalli Q. Z. Li Sudhir Malik Ia Iashvili Brajesh C Choudhary Elemer Nagy R. D. Schamberger V. N. Evdokimov Sung Keun Park D. R. Claes Gavin Davies R. Lopes De Sa V. V. Tokmenin D. Chakraborty R. Beuselinck M. Rominsky A. Jonckheere I. Kiselevich A. Lobodenko Neeti Parashar J. Hogan Regina Demina Xiaowen Lei I. Razumov M. Zielinski Suneel Dutt Don Lincoln Erich Varnes Daniel Duggan M. Hohlfeld Shangfeng Yang S. Desai Meenakshi Narain A. Juste Michael Mulhearn A. Alton M. Jaffré Joseph Haley L. Bellantoni M. Padilla Y. Scheglov D. Wicke J. Osta Petr Vokac N. Osman Jiping Zhu J. Hays Daria Zieminska G. Facini H. A. Neal J. T. Linnemann K. Yip Emilien Chapon Dmitri Tsybychev R. L. Mccarthy Thibault Guillemin V. Bunichev Alexander Kupco J. Joshi K. J. Smith H. Hegab V. Parihar L. S. Vertogradov P. D. Grannis S. Chevalier-théry John Hobbs G. Sajot M. S. Rangel I. Katsanos Jan Stark N. Parua D. Vilanova Randy Ruchti Frederic Deliot P. N. Ratoff Christopher George Tully M. Vesterinen A.s. Dyshkant Y. Peters A. Jayasinghe Y. A. Yatsunenko R. Madar Avto Kharchilava Patrick Slattery Maksym Titov J. Orduna P. Verdier P. Verdier Wade Cameron Fisher Pushpalatha C Bhat M. P. Sanders I. Howley Yurii Maravin Vladimir Gavrilov Y. N. Kharzheev Gordon Watts G. Alkhazov D. V. Bandurin Henry Lubatti M. R. Adams A. Das P. Svoisky T. Hoang S. Chakrabarti R. Bernhard R. Jesik W. E. Cooper Horst Severini Alexander Khanov D. Gerbaudo Cecile Deterre Emily Johnson Carlos Avila A. Sanchez-hernandez P. Rubinov J. Clutter B. C.k. Casey S. Söldner-rembold Phillip Gutierrez Hakjae Lee J. Weichert B. Hoeneisen Lee Sawyer P. Renkel Jean-arcady Meyer L. Bagby B. S. Acharya V. A. Kuzmin Arnaud Duperrin P. Neustroev G. Savage Richard B. Lipton Kamil Augsten K. A. Johns F. Miconi Oleg Brandt J. Martínez-ortega Bjoern Penning E. De La Cruz-burelo Marvin Johnson A. L. Lyon Konstantinos Petridis Andrew Askew A. V. Kozelov S. Schlobohm G. C. Blazey P. A. Kasper K. M. Chan J. Lellouch Y. Enari Andrew Brandt R. Yamada Kirti Ranjan Carsten Hensel Jean-francois Grivaz Graham Wilson J. F. Bartlett Robert Kehoe H. Greenlee Ulrich Heintz J. Kraus M. Naimuddin P. Jonsson H. E. Fisk A. Bross Steven W. Shaw M. Cooke A. Pal A. S. Ito A. Melnitchouk Thomas Hebbeker P. Skubic A. Y. Verkheev Mark Richard James Williams V. V. Lipaev L. Feng A. V. Popov Aran Garcia-bellido G. Bernardi Kristian Harder Emanuela Barberis D. Brown D. Cutts D. Edmunds Frank Filthaut Greg Landsberg K. Herner M. Diesburg K. Soustruznik Ashok Kumar Angelo De Souza Santos Sharon Hagopian A. K.a. Maciel D. Orbaker Tulika Bose Zhenyu Ye V. M. Podstavkov D. K. Cho M. Fortner A. Chandra A. Croc Ph Gris Yuri Gershtein P. Salcido D. A. Stoyanova Shih-chang Lee E. Camacho-pérez J. Warchol Reinhard Schwienhorst M. C. Cousinou W. M. Van Leeuwen J. Brown V. E. Bazterra T. Head Marc Besancon J. Sekaric Michael A. Strauss T. Scanlon Guo-ming Chen S. Kermiche Suman Bala Beri V. Hynek J. M. Yu Todd Adams N. K. Mondal D. Boline H. T. Diehl A. Boehnlein J. Ellison S. Fuess T. Kurca T. Kurca I. Ripp-baudot F. Badaud S. Atkins M. Merkin M. H.l.s. Wang Anthony Ross Alexander Grohsjean Lev Uvarov Vipin Bhatnagar R. Partridge Kenneth Bloom V. L. Malyshev M. S. Jeong Gavin Grant Hesketh S. Uvarov B. Quinn C. Schwanenberger Alice Bean Volker Buescher Harald Fox L. Suter Maiko Takahashi I. A. Vasilyev J. P. Negret R. Luna-garcia J. M. Hauptman Michael Hildreth Darren Price S. Uzunyan Cecilia Elena Gerber G. Ginther G. Ginther Amnon Harel Jianming Qian W. Geng W. Geng N. Khalatyan K. Tschann-grimm George Alverson D. Hedin Suyong Choi

subject

Physics Nuclear and High Energy Physics Particle physics Top quark Muon 010308 nuclear & particles physics media_common.quotation_subject Detector FOS: Physical sciences Electron Polarization (waves)01 natural sciences 7. Clean energy Asymmetry High Energy Physics - Experiment Nuclear physics High Energy Physics - Experiment (hep-ex)0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]High Energy Physics::Experiment Fermilab 010306 general physics Lepton media_common

description

We present measurements of lepton (l) angular distributions in ttbar -> W+ b W- b -> l+ nu b l- nubar bbar decays produced in ppbar collisions at a center-of-mass energy of sqrt(s)=1.96TeV, where l is an electron or muon. Using data corresponding to an integrated luminosity of 5.4fb^-1, collected with the D0 detector at the Fermilab Collider, we find that the angular distributions of l- relative to anti-protons and l+ relative to protons are in agreement with each other. Combining the two distributions and correcting for detector acceptance we obtain the forward-backward asymmetry A^l_FB = (5.8 +- 5.1(stat) +- 1.3(syst))%, compared to the standard model prediction of A^l_FB (predicted) = (4.7 +- 0.1)%. This result is further combined with the measurement based on the analysis of the l+jets final state to obtain A^l_FB = (11.8 +- 3.2)%. Furthermore, we present a first study of the top-quark polarization.

year	journal	country	edition	language
2013-01-24

10.1103/physrevd.87.011103 http://hal.in2p3.fr/in2p3-00713888