Search for supersymmetry using razor variables in events with b-tagged jets in pp collisions at root s=8 TeV
Austrian Federal Ministry of Science, Research and Economy (BMWFW) ; Austrian Science Fund (FWF) ; Belgian Fonds de la Recherche Scientifique (FNRS) ; Fonds voor Wetenschappelijk Onderzoek (FWO) ; 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) ; Bulgarian Ministry of Education and Science (MES) ; CERN ; the Chinese Academy of Sciences, Ministry of Science and Technology (MOST) ; National Natural Science Foundation of China (NSFC) ; Colombian Funding Agency (COLCIENCIAS) ; Croatian Ministry of Science, Education and Sport (MZOS) ; Croatian Science Foundation ; Research Promotion Foundation, Cyprus ; Ministry of Education and Research, Estonian Research Council via IUT23-4 and IUT23-6 ; European Regional Development Fund, Estonia ; Academy of Finland ; |Finnish Ministry of Education and Culture ; Helsinki Institute of Physics ; Institut National de Physique Nucléaire et de Physique des Particules/CNRS ; Commissariat à l'Énergie Atomique et aux Énergies Alternatives/CEA, France ; Bundesministerium für Bildung und Forschung, Deutsche ; Forschungsgemeinschaft ; Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany ; General Secretariat for Research and Technology, Greece ; National Scientific Research Foundation, and National Innovation Office, Hungary ; Department of Atomic Energy and the Department of Science and Technology, India ; Institute for Studies in Theoretical Physics and Mathematics, Iran ; Science Foundation, Ireland ; Istituto Nazionale di Fisica Nucleare, Italy ; Ministry of Science (ICT) ; Future Planning, and National Research Foundation (NRF) ; Republic of Korea ; Lithuanian Academy of Sciences ; Ministry of Education (Malaysia) ; University of Malaya ; CINVESTAV ; CONACYT ; SEP ; UASLPFAI ; Ministry of Business, Innovation and Employment, New Zealand ; Pakistan Atomic Energy Commission ; Ministry of Science and Higher Education and the National Science Centre, Poland ; Fundação para a Ciência e a Tecnologia, Portugal ; JINR, Dubna ; Ministry of Education and Science of the Russian Federation ; Federal Agency of Atomic Energy of the Russian Federation ; Russian Academy of Sciences ; Russian Foundation for Basic Research ; Ministry of Education, Science and Technological Development of Serbia ; Secretaría de Estado de Investigación, Desarrollo e Innovación ; Programa Consolider-Ingenio 2010, Spain ; S ; ETH Board ; ETH Zurich ; PSI ; SNF ; UniZH ; Canton Zurich ; SER ; Ministry of Science and Technology, Taipei ; Thailand Center of Excellence in Physics ; Institute for the Promotion of Teaching Science and Technology of Thailand ; Special Task Force for Activating Research and the National Science and Technology Development Agency of Thailand ; the Scientific and Technical Research Council of Turkey ; Turkish Atomic Energy Authority ; National Academy of Sciences of Ukraine ; State Fund for Fundamental Researches, Ukraine ; Science and Technology Facilities Council, UK ; U.S. Department of Energy ; U.S. National Science Foundation ; Marie Curie program ; European Research Council ; EPLANET (European Union) ; Leventis Foundation ; A. P. Sloan Foundation ; Alexander von Humboldt Foundation ; Belgian Federal Science Policy Office ; Fonds pour la Formation à 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 ; HOMINGPLUS program of Foundation for Polish Science ; European Union ; Regional Development Fund ; Compagnia di San Paolo (Torino) ; Consorzio per la Fisica (Trieste) ; MIUR (Italy) ; Thalis and Aristeia programs ; EU-ESF ; GreekNSRF ; National Priorities Research Program by Qatar National Research Fund ; MIUR: 20108T4XTM ; An inclusive search for supersymmetry in events with at least one b-tagged jet is performed using proton-proton collision data collected by the CMS experiment in 2012 at a center-of-mass energy of 8 TeV. The data set size corresponds to an integrated luminosity of 19.3 fb(-1). The two-dimensional distribution of the razor variables R-2 and M-R is studied in events with and without leptons. The data are found to be consistent with the expected background, which is modeled with an empirical function. Exclusion limits on supersymmetric particle masses at a 95% confidence level are derived in several simplified supersymmetric scenarios for several choices of the branching fractions. By combining the likelihoods of a search in events without leptons and a search that requires a single lepton (electron or muon), an improved bound on the top-squark mass is obtained. Assuming the lightest supersymmetric particle to be stable and weakly interacting, and to have a mass of 100 GeV, the branching-fraction-dependent (-independent) production of gluinos is excluded for gluino masses up to 1310 (1175) GeV. The corresponding limit for top-squark pair production is 730 (645) GeV.