Measurements of t(t)over-bar charge asymmetry using dilepton final states in pp collisions at √s=8 TeV

被引：21

作者：

Khachatryan, V. ^{[1
]}

Sirunyan, A. M. ^{[1
]}

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Asilar, E. ^{[2
]}

Bergauer, T. ^{[2
]}

Brandstetter, J. ^{[2
]}

Brondolin, E. ^{[2
]}

Dragicevic, M. ^{[2
]}

Eroe, J. ^{[2
]}

Flechl, M. ^{[2
]}

Friedl, M. ^{[2
]}

Fruehwirth, R. ^{[2
,192
]}

Ghete, V. M. ^{[2
]}

Hartl, C. ^{[2
]}

Hoermann, N. ^{[2
]}

Hrubec, J. ^{[2
]}

Jeitler, M. ^{[2
,192
]}

Koenig, A. ^{[2
]}

Krammer, M. ^{[2
,192
]}

Kraetschmer, I. ^{[2
]}

Liko, D. ^{[2
]}

Matsushita, T. ^{[2
]}

Mikulec, I. ^{[2
]}

Rabady, D. ^{[2
]}

Rad, N. ^{[2
]}

Rahbaran, B. ^{[2
]}

Rohringer, H. ^{[2
]}

Schieck, J. ^{[2
,192
]}

Schoefbeck, R. ^{[2
]}

Strauss, J. ^{[2
]}

Treberer-Treberspurg, W. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
,192
]}

Mossolov, V. ^{[3
]}

Shumeiko, N. ^{[3
]}

Gonzalez, J. Suarez ^{[3
]}

Alderweireldt, S. ^{[4
]}

Cornelis, T. ^{[4
]}

De Wolf, E. A. ^{[4
]}

Janssen, X. ^{[4
]}

Knutsson, A. ^{[4
]}

Lauwers, J. ^{[4
]}

Luyckx, S. ^{[4
]}

Van de Klundert, M. ^{[4
]}

Van Haevermaet, H. ^{[4
]}

Van Mechelen, P. ^{[4
]}

Van Remortel, N. ^{[4
]}

Van Spilbeeck, A. ^{[4
]}

Abu Zeid, S. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan, Armenia

[2] Inst Hochenergiephys OeAW, Vienna, Austria

[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS

[4] Univ Antwerp, Antwerp, Belgium

[5] Vrije Univ Brussel, Brussels, Belgium

[6] Univ Libre Bruxelles, Brussels, Belgium

[7] Univ Ghent, Ghent, Belgium

[8] Catholic Univ Louvain, Louvain, Belgium

[9] Univ Mons, Mons, Belgium

[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[11] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil

[12] Univ Estadual Paulista, Sao Paulo, Brazil

[13] Univ Fed ABC, Sao Paulo, Brazil

[14] Inst Nucl Energy Res, Sofia, Bulgaria

[15] Univ Sofia, Sofia, Bulgaria

[16] Beihang Univ, Beijing, Peoples R China

[17] Inst High Energy Phys, Beijing, Peoples R China

[18] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[19] Univ Los Andes, Bogota, Colombia

[20] Univ Split, Fac Elect Engn, Mech Engn & Naval Architecture, Split, Croatia

[21] Univ Split, Fac Sci, Split, Croatia

[22] Rudjer Boskovic Inst, Zagreb, Croatia

[23] Univ Cyprus, Nicosia, Cyprus

[24] Charles Univ Prague, Prague, Czech Republic

[25] Univ San Francisco Quito, Quito, Ecuador

[26] Egyptian Network High Energy Phys, Acad Sci Res & Technol Arab Republ Egypt, Cairo, Egypt

[27] NICPB, Tallinn, Estonia

[28] Univ Helsinki, Dept Phys, Helsinki, Finland

[29] Helsinki Inst Phys, Helsinki, Finland

[30] Lappeenranta Univ Technol, Lappeenranta, Finland

[31] CEA Saclay, DSM IRFU, Gif Sur Yvette, France

[32] CNRS, Lab Leprince Ringuet, Ecole Polytech, IN2P3, Palaiseau, France

[33] Univ Strasbourg, Inst Pluridisciplinaire Hubert Curien, CNRS, IN2P3,Univ Haute Alsace Mulhouse, Strasbourg, France

[34] CNRS, IN2P3, Ctr Calcul Inst Natl Phys Nucl & Phys Particules, Villeurbanne, France

[35] Univ Lyon, Univ Claude Bernard Lyon 1, CNRS, IN2P3,Inst Phys Nucl Lyon, Villeurbanne, France

[36] Georgian Tech Univ, Tbilisi, Georgia

[37] Tbilisi State Univ, Tbilisi, Georgia

[38] Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany

[39] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany

[40] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany

[41] DESY, Hamburg, Germany

[42] Univ Hamburg, Hamburg, Germany

[43] Inst Expt Kernphys, Karlsruhe, Germany

[44] NCSR Demokritos, Inst Nucl & Particle Phys, Aghia Paraskevi, Greece

[45] Natl & Kapodistrian Univ Athens, Athens, Greece

[46] Univ Ioannina, Ioannina, Greece

[47] Wigner Res Ctr Phys, Budapest, Hungary

[48] Inst Nucl Res ATOMKI, Debrecen, Hungary

[49] Univ Debrecen, Debrecen, Hungary

[50] Natl Inst Sci Educ & Res, Bhubaneswar, Orissa, India

来源：

PHYSICS LETTERS B | 2016年 / 760卷

基金：

芬兰科学院; 美国国家科学基金会; 巴西圣保罗研究基金会; 欧洲研究理事会;

关键词：

CMS; Physics; Top; Charge asymmetry; QUARK PAIR PRODUCTION; DECAY; TEVATRON;

D O I：

10.1016/j.physletb.2016.07.006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The charge asymmetry in ttevents is measured using dilepton final states produced in ppcollisions at the LHC at root s = 8 TeV. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.5 fb(-1). The measurements are performed using events with two oppositely charged leptons (electrons or muons) and two or more jets, where at least one of the jets is identified as originating from a bottom quark. The charge asymmetry is measured from differences in kinematic distributions, unfolded to the parton level, of positively and negatively charged top quarks and leptons. The t (t) over bar and leptonic inclusive charge asymmetries are found to be 0.011 +/- 0.011 (stat) +/- 0.007 (syst) and 0.003 +/- 0.006 (stat) +/- 0.003 (syst), respectively. These results, as well as charge asymmetry measurements made as a function of the invariant mass, rapidity, and transverse momentum of the t (t) over bar system, are in agreement with predictions of the standard model. (C) 2016 The Author(s). Published by Elsevier B.V.

引用

页码：365 / 386

页数：22

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