Abstract
Made available in DSpace on 2015-11-03T15:30:59Z (GMT). No. of bitstreams: 0
Previous issue date: 2014-09-17. Added 1 bitstream(s) on 2015-11-04T10:14:18Z : No. of bitstreams: 1
WOS000350142400001.pdf: 656154 bytes, checksum: 9f7866ef2e40e15cd7ad759fbb743d4d (MD5)
BMWFW (Austria)
FWF (Austria)
FNRS (Belgium)
FWO (Belgium)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
MES (Bulgaria)
CERN
CAS (China)
MoST (China)
NSFC (China)
COLCIENCIAS (Colombia)
MSES (Croatia)
CSF (Croatia)
RPF (Cyprus)
MoER (Estonia)
ERC IUT (Estonia)
ERDF (Estonia)
Academy of Finland (Finland)
MEC (Finland)
HIP (Finland)
CEA (France)
CNRS/IN2P3 (France)
BMBF (Germany)
DFG (Germany)
HGF (Germany)
GSRT (Greece)
OTKA (Hungary)
NIH (Hungary)
DAE (India)
DST (India)
IPM (Iran)
SFI (Ireland)
INFN (Italy)
NRF (Republic of Korea)
WCU (Republic of Korea)
LAS (Lithuania)
MOE (Malaysia)
UM (Malaysia)
CINVESTAV (Mexico)
CONACYT (Mexico)
SEP (Mexico)
UASLP-FAI (Mexico)
MBIE (New Zealand)
PAEC (Pakistan)
MSHE (Poland)
NSC (Poland)
FCT (Portugal)
JINR (Dubna)
MON (Russia)
RosAtom (Russia)
RAS (Russia)
RFBR (Russia)
MESTD (Serbia)
SEIDI (Spain)
CPAN (Spain)
Swiss Funding Agencies (Switzerland)
MST (Taipei)
ThEPCenter (Thailand)
IPST (Thailand)
STAR (Thailand)
NSTDA (Thailand)
TUBITAK (Turkey)
TAEK (Turkey)
NASU (Ukraine)
SFFR (Ukraine)
STFC (United Kingdom)
DOE (USA)
NSF (USA)
Marie-Curie programme (European Union)
European Research Council (European Union)
EPLANET (European Union)
Leventis Foundation
A. P. Sloan Foundation
Alexander von Humboldt Foundation
Belgian Federal Science Policy Office
Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)
Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)
Ministry of Education, Youth and Sports (MEYS) of the Czech Republic
Council of Science and Industrial Research, India
HOMING PLUS programme of Foundation for Polish Science
European Union, Regional Development Fund
Compagnia di San Paolo (Torino)
Thalis programme
Aristeia programme
EU-ESF
Greek NSRF
National Priorities Research Program by Qatar National Research Fund
A measurement of the cross section for the production of top quark-antiquark pairs (t (t) over bar) in association with a vector boson V (W or Z) in proton-proton collisions at root s = 8 TeV is presented. The results are based on a dataset corresponding to an integrated luminosity of 19.5 fb(-1) recorded with the CMS detector at the LHC. The measurement is performed in three leptonic (e and mu) channels: a same-sign dilepton analysis targeting t (t) over barW events, and trilepton and four-lepton analyses designed for t (t) over barZ events. In the same-sign dilepton channel, the t (t) over barW cross section is measured as sigma(t (t) over barW) = 170(-80)(+90) (stat) +/- 70 (syst) fb, 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 t (t) over barZ cross section, sigma(t (t) over barZ) = 200(-70)(+80) (stat)(-30)(+40) (syst)fb(-1), 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 t (t) over barV process is observed with a significance of 3.7 standard deviations from the combination of all three leptonic channels.
Yerevan Phys Inst, Yerevan 375036, Armenia
Inst Hochenergiephys OeAW, Vienna, Austria
Natl Ctr Particle &High Energy Phys, Minsk, Byelarus
Univ Antwerp, B-2020 Antwerp, Belgium
Vrije Univ Brussel, Brussels, Belgium
Univ Libre Bruxelles, Brussels, Belgium
Univ Ghent, B-9000 Ghent, Belgium
Catholic Univ Louvain, Louvain La Neuve, Belgium
Univ Mons, B-7000 Mons, Belgium
Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil
Univ Estadual Paulista, Sao Paulo, Brazil
Univ Fed ABC, Sao Paulo, Brazil
Bulgarian Acad Sci, Inst Nucl Res &Nucl Energy, Sofia, Bulgaria
Univ Sofia, BU-1126 Sofia, Bulgaria
Inst High Energy Phys, Beijing, Peoples R China
Peking Univ, State Key Lab Nucl Phys &Technol, Beijing 100871, Peoples R China
Univ Los Andes, Bogota, Colombia
Tech Univ Split, Split, Croatia
Univ Split, Split, Croatia
Rudjer Boskovic Inst, Zagreb, Croatia
Univ Cyprus, CY-1678 Nicosia, Cyprus
Charles Univ Prague, Prague, Czech Republic
Acad Sci Res &Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt
NICPB, Tallinn, Estonia
Univ Helsinki, Dept Phys, Helsinki, Finland
Helsinki Inst Phys, Helsinki, Finland
Lappeenranta Univ Technol, Lappeenranta, Finland
CEA Saclay, DSM IRFU, F-91191 Gif Sur Yvette, France
Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France
Univ Haute Alsace Mulhouse, Univ Strasbourg, Inst Pluridisciplinaire Hubert Curien, CNRS,IN2P3, Strasbourg, France
CNRS, IN2P3, Inst Natl Phys Nucl &Phys Particules, Ctr Calcul, Villeurbanne, France
Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France
Tbilisi State Univ, Inst High Energy Phys &Informatizat, GE-380086 Tbilisi, Rep of Georgia
Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany
Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
DESY, Hamburg, Germany
Univ Hamburg, Hamburg, Germany
Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe, Germany
NCSR Demokritos, INPP, Aghia Paraskevi, Greece
Univ Athens, Athens, Greece
Univ Ioannina, GR-45110 Ioannina, Greece
Wigner Res Ctr Phys, Budapest, Hungary
Inst Nucl Res ATOMKI, Debrecen, Hungary
Univ Debrecen, H-4012 Debrecen, Hungary
Natl Inst Sci Educ &Res, Bhubaneswar, Orissa, India
Panjab Univ, Chandigarh 160014, India
Univ Delhi, Delhi 110007, India
Saha Inst Nucl Phys, Kolkata, India
Bhabha Atom Res Ctr, Mumbai 400085, Maharashtra, India
Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India
Inst Res Fundamental Sci IPM, Tehran, Iran
Univ Coll Dublin, Dublin 2, Ireland
Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy
Univ Bari, Bari, Italy
Politecn Bari, Bari, Italy
Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy
Univ Bologna, Bologna, Italy
Ist Nazl Fis Nucl, Sez Catania, I-95129 Catania, Italy
Univ Catania, Catania, Italy
CSFNSM, Catania, Italy
Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy
Univ Florence, Florence, Italy
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
Univ Genoa, Genoa, Italy
Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20133 Milan, Italy
Univ Milano Bicocca, Milan, Italy
Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy
Univ Naples Federico II, Naples, Italy
Univ Basilicata Potenza, Naples, Italy
Univ G Marconi Roma, Naples, Italy
Ist Nazl Fis Nucl, Sez Padova, Padua, Italy
Univ Padua, Padua, Italy
Univ Trento Trento, Padua, Italy
Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy
Univ Pavia, I-27100 Pavia, Italy
Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy
Univ Perugia, I-06100 Perugia, Italy
Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy
Univ Pisa, Pisa, Italy
Scuola Normale Super Pisa, Pisa, Italy
Ist Nazl Fis Nucl, Sez Roma, Rome, Italy
Univ Rome, Rome, Italy
Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy
Univ Turin, Turin, Italy
Univ Piemonte Orientale Novara, Turin, Italy
Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy
Univ Trieste, Trieste, Italy
Chonbuk Natl Univ, Chonju, South Korea
Kangwon Natl Univ, Chunchon, South Korea
Kyungpook Natl Univ, Taegu 702701, South Korea
Chonnam Natl Univ, Inst Universe &Elementary Particles, Kwangju, South Korea
Korea Univ, Seoul, South Korea
Univ Seoul, Seoul, South Korea
Sungkyunkwan Univ, Suwon, South Korea
Vilnius Univ, Vilnius, Lithuania
Univ Malaya, Natl Ctr Particle Phys, Kuala Lumpur, Malaysia
IPN, Ctr Invest &Estudios Avanzados, Mexico City 07738, DF, Mexico
Univ Iberoamer, Mexico City, DF, Mexico
Benemerita Univ Autonoma Puebla, Puebla, Mexico
Univ Autonoma San Luis Potosi, San Luis Potosi, Mexico
Univ Auckland, Auckland 1, New Zealand
Univ Canterbury, Christchurch 1, New Zealand
Quaid I Azam Univ, Natl Ctr Phys, Islamabad, Pakistan
Natl Ctr Nucl Res, Otwock, Poland
Univ Warsaw, Inst Expt Phys, Fac Phys, Warsaw, Poland
Lab Instrumentacao &Fis Expt Particulas, Lisbon, Portugal
Joint Inst Nucl Res, Dubna, Russia
Petersburg Nucl Phys Inst, St Petersburg, Russia
Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia
Inst Theoret &Expt Phys, Moscow 117259, Russia
PN Lebedev Phys Inst, Moscow 117924, Russia
Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow, Russia
Inst High Energy Phys, State Res Ctr Russian Federat, Protvino, Russia
Univ Belgrade, Fac Phys, Belgrade 11001, Serbia
Vinca Inst Nucl Sci, Belgrade, Serbia
Ctr Invest Energet Medioambientales &Tecnol CIEM, Madrid, Spain
Univ Autonoma Madrid, Madrid, Spain
Univ Oviedo, Oviedo, Spain
Univ Cantabria, CSIC, Inst Fis Cantabria IFCA, E-39005 Santander, Spain
CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland
Paul Scherrer Inst, Villigen, Switzerland
ETH, Inst Particle Phys, Zurich, Switzerland
Univ Zurich, Zurich, Switzerland
Natl Cent Univ, Chungli 32054, Taiwan
Natl Taiwan Univ, Taipei 10764, Taiwan
Chulalongkorn Univ, Fac Sci, Dept Phys, Bangkok, Thailand
Cukurova Univ, Adana, Turkey
Middle E Tech Univ, Dept Phys, TR-06531 Ankara, Turkey
Bogazici Univ, Istanbul, Turkey
Istanbul Tech Univ, TR-80626 Istanbul, Turkey
Kharkov Inst Phys &Technol, Natl Sci Ctr, Kharkov, Ukraine
Univ Bristol, Bristol, Avon, England
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
Univ London Imperial Coll Sci Technol &Med, London, England
Brunel Univ, Uxbridge UB8 3PH, Middx, England
Baylor Univ, Waco, TX 76798 USA
Univ Alabama, Tuscaloosa, AL USA
Boston Univ, Bos