Search for physics beyond the standard model in events with a Z boson, jets, and missing transverse energy in pp collisions at √s=7 TeV

39 páginas, 12 figuras, 6 tablas.-- CMS Collaboration: et al.-- Open access: This article is published Open Access at sciencedirect.com. It\ud
is distributed under the terms of the Creative Commons Attribution License 3.0.A search is presented for physics beyond the standard model (BSM) in events with a Z boson, jets, and missing transverse energy (MET). This signature is motivated by BSM physics scenarios, including supersymmetry. The study is performed using a sample of proton-proton collision data collected at sqrt(s) = 7 TeV with the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.98 inverse femtobarns. The contributions from the dominant standard model backgrounds are estimated from data using two complementary strategies, the jet-Z balance technique and a method based on modeling MET with data control samples. In the absence of evidence for BSM physics, we set limits on the non-standard-model contributions to event yields in the signal regions and interpret the results in the context of simplified model spectra. Additional information is provided to facilitate tests of other BSM physics models.European Commission; Federal Ministry of Science, Research and Economy (Austria); National Fund for Scientific Research (Belgium); Research Foundation – Flanders; Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil); Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro; Fundação de Amparo à Pesquisa do Estado de São Paulo; Bulgarian Ministry of Education and Science; Centre National de la Recherche Scientifique (France); Commissariat à l'énergie atomique et aux énergies alternatives (France); Ministry of Science and Technology of the People's Republic of China; Chinese Academy of Sciences; National Natural Science Foundation of China; Colciencias (Colombia); Croatian Ministry of Science, Education and Sport; Academy of Finland; Helsinki Institute of Physics; Bundesministerium für Bildung und Forschung (Deutschland); Deutsche Forschungsgemeinschaft; Helmholtz Association; General Secretariat of Research and Technology (Greece); Hungarian Scientific Research Fund; National Office for Research and Technology (Hungary); Department of Atomic Energy (India); Department of Science and Technology (India); Council of Science and Industrial Research (India); Institute for Research in Fundamental Sciences (Iran); Science Foundation Ireland; Istituto Nazionale di Fisica Nucleare (Italia); Korean Ministry of Education, Science and Technology; Lithuanian Academy of Sciences; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (México); Consejo Nacional de Ciencia y Tecnología (México); Secretaría de Educación Pública (México); Universidad Autónoma de San Luis Potosí; Ministry of Science and Innovation (New Zealand); Ministry of Science and Higher Education and the National Science Centre (Poland); Fundação para a Ciência e a Tecnologia (Portugal); Joint Institute for Nuclear Research (Russia); Russian Academy of Sciences; Russian Foundation for Basic Research; Ministry of Education, Science and Technological Development (Serbia); Ministerio de Ciencia e Innovación (España); Swiss Funding Agencies; Swiss National Science Foundation; National Science Council (Taiwan); The Scientific and Technological Research Council of Turkey; Turkish Atomic Energy Authority; Science and Technology Facilities Council (UK); Department of Energy (US); National Science Foundation (US); A. G. Leventis Foundation; Alfred P. Sloan Foundation; Alexander von Humboldt Foundation; Foundation for Polish Science.Peer reviewe