Artículos de revistas
Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at s =8 TeV
Fecha
2016-03-22Registro en:
Physical Review D, v. 93, n. 5, 2016.
2470-0029
2470-0010
10.1103/PhysRevD.93.052011
2-s2.0-84963973501
Autor
Yerevan Physics Institute
Institut für Hochenergiephysik der OeAW
National Centre for Particle and High Energy Physics
Universiteit Antwerpen
Vrije Universiteit Brussel
Université Libre de Bruxelles
Ghent University
Université Catholique de Louvain
Université de Mons
Centro Brasileiro de Pesquisas Fisicas
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (UNESP)
Universidade Federal do ABC (UFABC)
Institute for Nuclear Research and Nuclear Energy
University of Sofia
Institute of High Energy Physics
Peking University
Universidad de Los Andes
Mechanical Engineering and Naval Architecture
Faculty of Science
Institute Rudjer Boskovic
University of Cyprus
Charles University
Egyptian Network of High Energy Physics
National Institute of Chemical Physics and Biophysics
University of Helsinki
Helsinki Institute of Physics
Lappeenranta University of Technology
CEA/Saclay
IN2P3-CNRS
CNRS/IN2P3
Institut de Physique Nucléaire de Lyon
Georgian Technical University
Tbilisi State University
I. Physikalisches Institut
III. Physikalisches Institut A
III. Physikalisches Institut B
Deutsches Elektronen-Synchrotron
University of Hamburg
Institut für Experimentelle Kernphysik
NCSR Demokritos
University of Athens
University of Ioánnina
Wigner Research Centre for Physics
Institute of Nuclear Research ATOMKI
University of Debrecen
National Institute of Science Education and Research
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research
Indian Institute of Science Education and Research (IISER)
Institute for Research in Fundamental Sciences (IPM)
University College Dublin
INFN Sezione di Bari
Università di Bari
Politecnico di Bari
INFN Sezione di Bologna
Università di Bologna
INFN Sezione di Catania
Università di Catania
INFN Sezione di Firenze
Università di Firenze
INFN Laboratori Nazionali di Frascati
INFN Sezione di Genova
Università di Genova
INFN Sezione di Milano-Bicocca
Università di Milano-Bicocca
INFN Sezione di Napoli
Università di Napoli 'Federico II'
Università della Basilicata
Università G. Marconi
INFN Sezione di Padova
Università di Padova
Università di Trento
INFN Sezione di Pavia
Università di Pavia
INFN Sezione di Perugia
Università di Perugia
INFN Sezione di Pisa
Università di Pisa
Scuola Normale Superiore di Pisa
INFN Sezione di Roma
Università di Roma
INFN Sezione di Torino
Università di Torino
Università Del Piemonte Orientale
INFN Sezione di Trieste
Università di Trieste
Kangwon National University
Kyungpook National University
Chonbuk National University
Institute for Universe and Elementary Particles
Korea University
Seoul National University
University of Seoul
Sungkyunkwan University
Vilnius University
Universiti Malaya
Centro de Investigacion y de Estudios Avanzados Del IPN
Universidad Iberoamericana
Benemerita Universidad Autonoma de Puebla
Universidad Autónoma de San Luis Potosí
University of Auckland
University of Canterbury
Quaid-I-Azam University
National Centre for Nuclear Research
University of Warsaw
Laboratório de Instrumentação e Física Experimental de Partículas
Joint Institute for Nuclear Research
Petersburg Nuclear Physics Institute
Institute for Nuclear Research
Institute for Theoretical and Experimental Physics
Moscow Engineering Physics Institute (MEPhI)
P.N. Lebedev Physical Institute
Lomonosov Moscow State University
Institute for High Energy Physics
Vinca Institute of Nuclear Sciences
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
Universidad de Oviedo
CSIC-Universidad de Cantabria
European Organization for Nuclear Research
Paul Scherrer Institut
ETH Zurich
Universität Zürich
National Central University
National Taiwan University (NTU)
Cukurova University
Physics Department
Bogazici University
Istanbul Technical University
Academy of Science of Ukraine
Kharkov Institute of Physics and Technology
University of Bristol
Rutherford Appleton Laboratory
Imperial College
Brunel University
Baylor University
University of Alabama
Boston University
Brown University
Davis
University of California
Riverside
Santa Barbara
California Institute of Technology
Carnegie Mellon University
University of Colorado Boulder
Cornell University
Fermi National Accelerator Laboratory
University of Florida
Florida International University
Florida State University
Florida Institute of Technology
University of Illinois at Chicago (UIC)
University of Iowa
Johns Hopkins University
University of Kansas
Kansas State University
Lawrence Livermore National Laboratory
University of Maryland
Massachusetts Institute of Technology
University of Minnesota
University of Mississippi
University of Nebraska-Lincoln
State University of New York at Buffalo
Northeastern University
Northwestern University
University of Notre Dame
Ohio State University
Princeton University
University of Puerto Rico
Purdue University
Purdue University Calumet
Rice University
University of Rochester
State University of New Jersey
University of Tennessee
Texas AandM University
Texas Tech University
Vanderbilt University
University of Virginia
Wayne State University
University of Wisconsin - Madison
Texas AandM University at Qatar
Vienna University of Technology
Universidade Estadual de Campinas (UNICAMP)
Centre National de la Recherche Scientifique (CNRS)
Suez University
British University in Egypt
Cairo University
Fayoum University
Université de Haute Alsace
Indian Institute of Science Education and Research
Brandenburg University of Technology
Inst. of Nuclear Research ATOMKI
Eötvös Loránd University
University of Visva-Bharati
King Abdulaziz University
University of Ruhuna
Isfahan University of Technology
University of Tehran
Islamic Azad University
Università degli Studi di Siena
International Islamic University of Malaysia
MOSTI
Consejo Nacional de Ciencia y Tecnología
Institute of Electronic Systems
St. Petersburg State Polytechnical University
University of Belgrade
National Technical University of Athens
Scuola Normale e Sezione dell'Infn
Albert Einstein Center for Fundamental Physics
Adiyaman University
Mersin University
Cag University
Piri Reis University
Gaziosmanpasa University
Ozyegin University
Izmir Institute of Technology
Marmara University
Kafkas University
Istanbul
Yildiz Technical University
Hacettepe University
University of Southampton
Instituto de Astrofísica de Canarias
Utah Valley University
Argonne National Laboratory
Erzincan University
Institución
Resumen
A search for evidence of particle dark matter (DM) and unparticle production at the LHC has been performed using events containing two charged leptons, consistent with the decay of a Z boson, and large missing transverse momentum. This study is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 fb-1 of pp collisions at the LHC at a center-of-mass energy of 8 TeV. No significant excess of events is observed above the number expected from the standard model contributions. The results are interpreted in terms of 90% confidence level limits on the DM-nucleon scattering cross section, as a function of the DM particle mass, for both spin-dependent and spin-independent scenarios. Limits are set on the effective cutoff scale Λ, and on the annihilation rate for DM particles, assuming that their branching fraction to quarks is 100%. Additionally, the most stringent 95% confidence level limits to date on the unparticle model parameters are obtained.