Search for the production of an excited bottom quark decaying to tW in proton-proton collisions at √s = 8 TeV

Journal of High Energy Physics 2016.1 (2016): 166 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Artículo escrito por un elevado número de autores, sólo se referencian el nombre del que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere y los autores que firman como pertenecientes a la UAMA search is presented for a singly produced excited bottom quark (b∗  ) decaying  to a top quark and a W boson in the all-hadronic, lepton+jets, and dilepton final states  in proton-proton collisions at √  s = 8 TeV recorded by the CMS experiment at the CERN  LHC. Data corresponding to an integrated luminosity of 19.7 fb−1 are used. No significant  excess of events is observed with respect to standard model expectations. We set limits at  95% confidence on the product of the b∗ quark production cross section and its branching  fraction to tW. The cross section limits are interpreted for scenarios including left-handed,  right-handed, and vector-like couplings of the b∗ quark and are presented in the two dimensional  coupling plane based on the production and decay coupling constants. The  masses of the left-handed, right-handed, and vector-like b∗ quark states are excluded at  95% confidence below 1390, 1430, and 1530 GeV, respectively, for benchmark couplings.  This analysis gives the most stringent limits on the mass of the b∗ quark to dateFinally, we acknowledge the enduring support for the construction and  operation of the LHC and the CMS detector provided by the following funding agencies:  the Austrian Federal Ministry of Science, Research and Economy and the Austrian Science  Fund; the Belgian Fonds de la Recherche Scientifique, and Fonds voor Wetenschappelijk  Onderzoek; the Brazilian Funding Agencies (CNPq, CAPES, FAPERJ, and FAPESP); the Bulgarian Ministry of Education and Science; CERN; the Chinese Academy of Sciences,  Ministry of Science and Technology, and National Natural Science Foundation of China; the  Colombian Funding Agency (COLCIENCIAS); the Croatian Ministry of Science, Education  and Sport, and the Croatian Science Foundation; the Research Promotion Foundation,  Cyprus; the Ministry of Education and Research, Estonian Research Council via IUT23-4  and IUT23-6 and European Regional Development Fund, Estonia; the Academy of Finland,  Finnish Ministry of Education and Culture, and Helsinki Institute of Physics; the Institut  National de Physique Nucléaire et de Physique des Particules / CNRS, and Commissariat à  l’Energie Atomique et aux  Énergies Alternatives / CEA, France; the Bundesministerium für  Bildung und Forschung, Deutsche Forschungsgemeinschaft, and Helmholtz-Gemeinschaft  Deutscher Forschungszentren, Germany; the General Secretariat for Research and Technology,  Greece; the National Scientific Research Foundation, and National Innovation Office,  Hungary; the Department of Atomic Energy and the Department of Science and Technology,  India; the Institute for Studies in Theoretical Physics and Mathematics, Iran; the  Science Foundation, Ireland; the Istituto Nazionale di Fisica Nucleare, Italy; the Ministry of Science, ICT and Future Planning, and National Research Foundation (NRF), Republic  of Korea; the Lithuanian Academy of Sciences; the Ministry of Education, and University  of Malaya (Malaysia); the Mexican Funding Agencies (CINVESTAV, CONACYT, SEP,  and UASLP-FAI); the Ministry of Business, Innovation and Employment, New Zealand;  the Pakistan Atomic Energy Commission; the Ministry of Science and Higher Education  and the National Science Centre, Poland; the Fundação para a Cîencia e a Tecnologia,  Portugal; JINR, Dubna; the Ministry of Education and Science of the Russian Federation,  the Federal Agency of Atomic Energy of the Russian Federation, Russian Academy of  Sciences, and the Russian Foundation for Basic Research; the Ministry of Education, Science  and Technological Development of Serbia; the Secretaría de Estado de Investigación,  Desarrollo e Innovación and Programa Consolider-Ingenio 2010, Spain; the Swiss Funding  Agencies (ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and SER); the  Ministry of Science and Technology, Taipei; the Thailand Center of Excellence in Physics,  the 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, and Turkish  Atomic Energy Authority; the National Academy of Sciences of Ukraine, and State Fund  for Fundamental Researches, Ukraine; the Science and Technology Facilities Council, U.K.;  the US Department of Energy, and the US National Science Foundation.  Individuals have received support from the Marie-Curie programme and the European  Research Council and EPLANET (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal  Science Policy Office; the Fonds pour la Formation à la Recherche dans l’Industrie et dans  l’Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie  (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech  Republic; the Council of Science and Industrial Research, India; the HOMING PLUS programme  of the Foundation for Polish Science, cofinanced from European Union, Regional  Development Fund; the OPUS programme of the National Science Center (Poland); the  Compagnia di San Paolo (Torino); the Consorzio per la Fisica (Trieste); MIUR project  20108T4XTM (Italy); the Thalis and Aristeia programmes cofinanced by EU-ESF and the  Greek NSRF; the National Priorities Research Program by Qatar National Research Fund;  the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University  (Thailand); and the Welch Foundation, contract C-184