Measurement of top quark-antiquark pair production in association with a W or Z boson in pp collisions at [Formula: see text][Formula: see text]

. 2014 ; 74 (9) : 3060. [epub] 20140917

Status PubMed-not-MEDLINE Jazyk angličtina Země Francie Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid25814914

A measurement of the cross section for the production of top quark-antiquark pairs ([Formula: see text]) in association with a vector boson V (W or Z) in proton-proton collisions at [Formula: see text][Formula: see text] is presented. The results are based on a dataset corresponding to an integrated luminosity of 19.5 fb[Formula: see text] recorded with the CMS detector at the LHC. The measurement is performed in three leptonic (e and [Formula: see text]) channels: a same-sign dilepton analysis targeting [Formula: see text] events, and trilepton and four-lepton analyses designed for [Formula: see text] events. In the same-sign dilepton channel, the [Formula: see text] cross section is measured as [Formula: see text], corresponding to a significance of 1.6 standard deviations over the background-only hypothesis. Combining the trilepton and four-lepton channels, a direct measurement of the [Formula: see text] cross section, [Formula: see text], is obtained with a significance of 3.1 standard deviations. The measured cross sections are compatible with standard model predictions within their experimental uncertainties. The inclusive [Formula: see text] process is observed with a significance of 3.7 standard deviations from the combination of all three leptonic channels.

Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt

Baylor University Waco USA

Benemerita Universidad Autonoma de Puebla Puebla Mexico

Bhabha Atomic Research Centre Mumbai India

Bogazici University Istanbul Turkey

Boston University Boston USA

Brown University Providence USA

Brunel University Uxbridge UK

California Institute of Technology Pasadena USA

Carnegie Mellon University Pittsburgh USA

Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules CNRS IN2P3 Villeurbanne France

Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil

Centro de Investigacion y de Estudios Avanzados del IPN Mexico City Mexico

Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid Spain

CERN European Organization for Nuclear Research Geneva Switzerland

CERN Geneva Switzerland

Charles University Prague Czech Republic

Chonbuk National University Chonju Korea

Chonnam National University Institute for Universe and Elementary Particles Kwangju Korea

Chulalongkorn University Faculty of Science Department of Physics Bangkok Thailand

Cornell University Ithaca USA

Cukurova University Adana Turkey

Department of Physics University of Helsinki Helsinki Finland

Deutsches Elektronen Synchrotron Hamburg Germany

DSM IRFU CEA Saclay Gif sur Yvette France

Fairfield University Fairfield USA

Fermi National Accelerator Laboratory Batavia USA

Florida Institute of Technology Melbourne USA

Florida International University Miami USA

Florida State University Tallahassee USA

Ghent University Ghent Belgium

Helsinki Institute of Physics Helsinki Finland

Imperial College London UK

INFN Laboratori Nazionali di Frascati Frascati Italy

INFN Sezione di Bari Università di Bari Politecnico di Bari Bari Italy

INFN Sezione di Bologna Università di Bologna Bologna Italy

INFN Sezione di Catania Università di Catania CSFNSM Catania Italy

INFN Sezione di Firenze Università di Firenze Florence Italy

INFN Sezione di Genova Università di Genova Genoa Italy

INFN Sezione di Milano Bicocca Università di Milano Bicocca Milan Italy

INFN Sezione di Napoli Università di Napoli 'Federico II' Università della Basilicata Naples Italy

INFN Sezione di Padova Università di Padova Università di Trento Padua Italy

INFN Sezione di Pavia Università di Pavia Pavia Italy

INFN Sezione di Perugia Università di Perugia Perugia Italy

INFN Sezione di Pisa Università di Pisa Scuola Normale Superiore di Pisa Pisa Italy

INFN Sezione di Roma Università di Roma Rome Italy

INFN Sezione di Torino Università di Torino Università del Piemonte Orientale Turin Italy

INFN Sezione di Trieste Università di Trieste Trieste Italy

Institut de Physique Nucléaire de Lyon Université de Lyon Université Claude Bernard Lyon 1 CNRS IN2P3 Villeurbanne France

Institut für Experimentelle Kernphysik Karlsruhe Germany

Institut für Hochenergiephysik der OeAW Wien Austria

Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS IN2P3 Strasbourg France

Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria

Institute for Nuclear Research Moscow Russia

Institute for Particle Physics ETH Zurich Zurich Switzerland

Institute for Research in Fundamental Sciences Tehran Iran

Institute for Theoretical and Experimental Physics Moscow Russia

Institute of Experimental Physics Faculty of Physics University of Warsaw Warsaw Poland

Institute of High Energy Physics and Informatization Tbilisi State University Tbilisi Georgia

Institute of High Energy Physics Beijing China

Institute of Nuclear and Particle Physics NCSR Demokritos Aghia Paraskevi Greece

Institute of Nuclear Research ATOMKI Debrecen Hungary

Institute Rudjer Boskovic Zagreb Croatia

Instituto de Física de Cantabria CSIC Universidad de Cantabria Santander Spain

Istanbul Technical University Istanbul Turkey

Johns Hopkins University Baltimore USA

Joint Institute for Nuclear Research Dubna Russia

Kangwon National University Chunchon Korea

Kansas State University Manhattan USA

Korea University Seoul Korea

Kyungpook National University Taegu Korea

Laboratoire Leprince Ringuet Ecole Polytechnique IN2P3 CNRS Palaiseau France

Laboratório de Instrumentação e Física Experimental de Partículas Lisbon Portugal

Lappeenranta University of Technology Lappeenranta Finland

Lawrence Livermore National Laboratory Livermore USA

Massachusetts Institute of Technology Cambridge USA

National Central University Chung Li Taiwan

National Centre for Nuclear Research Swierk Poland

National Centre for Particle and High Energy Physics Minsk Belarus

National Centre for Particle Physics Universiti Malaya Kuala Lumpur Malaysia

National Centre for Physics Quaid 1 Azam University Islamabad Pakistan

National Institute of Chemical Physics and Biophysics Tallinn Estonia

National Institute of Science Education and Research Bhubaneswar India

National Scientific Center Kharkov Institute of Physics and Technology Kharkiv Ukraine

National Taiwan University Taipei Taiwan

Northeastern University Boston USA

Northwestern University Evanston USA

P N Lebedev Physical Institute Moscow Russia

Panjab University Chandigarh India

Paul Scherrer Institut Villigen Switzerland

Petersburg Nuclear Physics Institute Gatchina Russia

Physics Department Middle East Technical University Ankara Turkey

Princeton University Princeton USA

Purdue University Calumet Hammond USA

Purdue University West Lafayette USA

Rice University Houston USA

Rutgers The State University of New Jersey Piscataway USA

Rutherford Appleton Laboratory Didcot UK

RWTH Aachen University 1 Physikalisches Institut Aachen Germany

RWTH Aachen University 3 Physikalisches Institut A Aachen Germany

RWTH Aachen University 3 Physikalisches Institut B Aachen Germany

Saha Institute of Nuclear Physics Kolkata India

Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow Russia

State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China

State Research Center of Russian Federation Institute for High Energy Physics Protvino Russia

State University of New York at Buffalo Buffalo USA

Sungkyunkwan University Suwon Korea

Tata Institute of Fundamental Research Mumbai India

Technical University of Split Split Croatia

Texas A and M University College Station USA

Texas Tech University Lubbock USA

The Ohio State University Columbus USA

The Rockefeller University New York USA

The University of Alabama Tuscaloosa USA

The University of Iowa Iowa City USA

The University of Kansas Lawrence USA

Universidad Autónoma de Madrid Madrid Spain

Universidad Autónoma de San Luis Potosí San Luis Potosí Mexico

Universidad de Los Andes Bogotá Colombia

Universidad de Oviedo Oviedo Spain

Universidad Iberoamericana Mexico City Mexico

Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil

Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil

Universität Zürich Zurich Switzerland

Université Catholique de Louvain Louvain la Neuve Belgium

Université de Mons Mons Belgium

Université Libre de Bruxelles Bruxelles Belgium

Universiteit Antwerpen Antwerp Belgium

University College Dublin Dublin Ireland

University of Athens Athens Greece

University of Auckland Auckland New Zealand

University of Belgrade Faculty of Physics and Vinca Institute of Nuclear Sciences Belgrade Serbia

University of Bristol Bristol UK

University of California Davis USA

University of California Los Angeles USA

University of California Riverside Riverside USA

University of California San Diego La Jolla USA

University of California Santa Barbara Santa Barbara USA

University of Canterbury Christchurch New Zealand

University of Colorado at Boulder Boulder USA

University of Cyprus Nicosia Cyprus

University of Debrecen Debrecen Hungary

University of Delhi Delhi India

University of Florida Gainesville USA

University of Hamburg Hamburg Germany

University of Illinois at Chicago Chicago USA

University of Ioánnina Ioannina Greece

University of Maryland College Park USA

University of Minnesota Minneapolis USA

University of Mississippi Oxford USA

University of Nebraska Lincoln Lincoln USA

University of Notre Dame Notre Dame USA

University of Puerto Rico Mayagüez USA

University of Rochester Rochester USA

University of Seoul Seoul Korea

University of Sofia Sofia Bulgaria

University of Split Split Croatia

University of Tennessee Knoxville USA

University of Virginia Charlottesville USA

University of Wisconsin Madison USA

Vanderbilt University Nashville USA

Vilnius University Vilnius Lithuania

Vrije Universiteit Brussel Brussel Belgium

Wayne State University Detroit USA

Wigner Research Centre for Physics Budapest Hungary

Yerevan Physics Institute Yerevan Armenia

Zobrazit více v PubMed

CDF Collaboration, Observation of top quark production in PubMed

D0 Collaboration, Observation of the top quark. Phys. Rev. Lett. 74, 2632 (1995). doi:10.1103/PhysRevLett.74.2632 PubMed

Glashow SL. Partial-symmetries of weak interactions. Nucl. Phys. 1961;22:579. doi: 10.1016/0029-5582(61)90469-2. DOI

S. Weinberg, A model of leptons. Phys. Rev. Lett. 19, 1264 (1967). doi:10.1103/PhysRevLett.19.1264

A. Salam, in Elementary Particle Physics: Relativistic Groups and Analyticity. Weak and Electromagnetic Interactions. Proceedings of the Eighth Nobel Symposium, ed. by N. Svartholm (Almqvist & Wiskell, 1968), p. 367

Barnett RM, Gunion JF, Haber HE. Discovering supersymmetry with like-sign dileptons. Phys. Lett. B. 1993;315:349. doi: 10.1016/0370-2693(93)91623-U. DOI

Guchait M, Roy DP. Like-sign dilepton signature for gluino production at CERN LHC including top quark and Higgs boson effects. Phys. Rev. D. 1995;52:133. doi: 10.1103/PhysRevD.52.133. PubMed DOI

Baer H, Chen C-H, Paige F, Tata X. Signals for minimal supergravity at the CERN large hadron collider. II: Multi-lepton channels. Phys. Rev. D. 1996;53:6241. doi: 10.1103/PhysRevD.53.6241. PubMed DOI

CMS Collaboration, Search for new physics in events with same-sign dileptons and jets in pp collisions at

CMS Collaboration, Search for anomalous production of multilepton events in pp collisions at

CDF Collaboration, Evidence for

CMS Collaboration, Measurement of associated production of vector bosons and top quark-antiquark pairs at PubMed

Lai H-L, et al. New parton distributions for collider physics. Phys. Rev. D. 2010;82:074024. doi: 10.1103/PhysRevD.82.074024. DOI

J. Alwall et al., The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations. JHEP 07, 079 (2014). doi:10.1007/JHEP07(2014)079. arXiv:1405.0301

Frixione S, Webber BR. Matching NLO QCD computations and parton shower simulations. JHEP. 2002;06:029. doi: 10.1088/1126-6708/2002/06/029. DOI

J.M. Campbell, R.K. Ellis,

M.V. Garzelli, A. Kardos, C.G. Papadopoulos, Z. Trocsanyi,

CMS Collaboration, The CMS experiment at the CERN LHC. JINST 3, S08004 (2008). doi:10.1088/1748-0221/3/08/S08004

CMS Collaboration, Particle-Flow Event Reconstruction in CMS and Performance for Jets, Taus, and

CMS Collaboration, Commissioning of the Particle-flow Event Reconstruction with the first LHC collisions recorded in the CMS detector, CMS Physics Analysis Summary. CMS-PAS-PFT-10-001 (2010)

Cacciari M, Salam GP, Soyez G. The anti- DOI

CMS Collaboration, Determination of jet energy calibration and transverse momentum resolution in CMS. JINST 6, P11002 (2011). doi:10.1088/1748-0221/6/11/P11002. arXiv:1107.4277

Cacciari M, Salam GP, Soyez G. The catchment area of jets. JHEP. 2008;04:005. doi: 10.1088/1126-6708/2008/04/005. DOI

CMS Collaboration, Measurements of differential jet cross sections in proton-proton collisions at

CMS Collaboration, Pileup Jet Identification, CMS Physics Analysis Summary. CMS-PAS-JME-13-005 (2013)

CMS Collaboration, Performance of b tagging at

CMS Collaboration, Performance of CMS muon reconstruction in pp collision events at

CMS Collaboration, Electron Reconstruction and Identification at

CMS Collaboration, Observation of a new boson with mass near 125 GeV in pp collisions at

J. Alwall et al., MadGraph 5: going beyond. JHEP 06, 128 (2011). doi:10.1007/JHEP06(2011)128. arXiv:1106.0522

T. Sjöstrand, S. Mrenna, P.Z. Skands, Pythia 6.4 physics and manual, JHEP 05 026 (2006). doi: 10.1088/1126-6708/2006/05/026. arXiv:hep-ph/0603175

GEANT4 Collaboration, Geant4—a simulation toolkit. Nucl. Instrum. Meth. A 506, 250 (2003). doi:10.1016/S0168-9002(03)01368-8

Nadolsky PM, et al. Implications of CTEQ global analysis for collider observables. Phys. Rev. D. 2008;78:013004. doi: 10.1103/PhysRevD.78.013004. DOI

Particle Data Group Collaboration, Phys. Rev. D Review of particle physics. 86, 010001 (2012). doi:10.1103/PhysRevD.86.010001

CMS Collaboration, Study of double parton scattering using W + 2-jet events in proton-proton collisions at

CMS Collaboration, CMS Luminosity Based on Pixel Cluster Counting-Summer 2013 Update, CMS Physics Analysis Summary. CMS-PAS-LUM-13-001 (2013)

CMS Collaboration, Measurement of

CMS Collaboration, Identification of b-quark jets with the CMS experiment. JINST 8, P04013 (2013). doi:10.1088/1748-0221/8/04/P04013. arXiv:1211.4462

S. Alekhin et al., The PDF4LHC Working Group Interim Report (2011) arXiv:1101.0536

M. Botje et al., The PDF4LHC Working Group Interim Recommendations (2011). arXiv:1101.0538

NNPDF Collaboration, Impact of heavy quark masses on parton distributions and LHC Phenomenology, Nucl. Phys. B 849, 296 (2011). doi: 10.1016/j.nuclphysb.2011.03.021. arXiv:1101.1300

Martin AD, Stirling WJ, Thorne RS, Watt G. Parton distributions for the LHC. Eur. Phys. J. C. 2009;63:189. doi: 10.1140/epjc/s10052-009-1072-5. DOI

Najít záznam

Citační ukazatele

Nahrávání dat ...

Možnosti archivace

Nahrávání dat ...