Search for W ′ → t b ¯ in the lepton plus jets final state in proton–proton collisions at a centre-of-mass energy of s = 8 TeV with the ATLAS detector

ATLAS Collaboration

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A search for new charged massive gauge bosons, called W, is performed with the ATLAS detector at the LHC, in proton–proton collisions at a centre-of-mass energy of s=8 TeV, using a dataset corresponding to an integrated luminosity of 20.3 fb−1. This analysis searches for W bosons in the W→tb¯ decay channel in final states with electrons or muons, using a multivariate method based on boosted decision trees. The search covers masses between 0.5 and 3.0 TeV, for right-handed or left-handed W bosons. No significant deviation from the Standard Model expectation is observed and limits are set on the W→tb¯ cross-section times branching ratio and on the W-boson effective couplings as a function of the W-boson mass using the CLs procedure. For a left-handed (right-handed) W boson, masses below 1.70 (1.92) TeV are excluded at 95% confidence level.

Original languageEnglish
Pages (from-to)235-255
Number of pages21
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - 9 Apr 2015


FundersFunder number
Not addedST/N000420/1
Cantons of Bern and Geneva
Czech Republic
MES of Russia
Wallenberg Foundation
National Science Foundation1119200, 1506173
National Science Foundation
U.S. Department of Energy
Semiconductor Research Corporation
Biomedical Research Foundation of Northwest Louisiana
Human Growth Foundation
Alexander von Humboldt-Stiftung
American Roentgen Ray Society
Arkansas Space Grant Consortium
Brookhaven National Laboratory
California Department of Fish and Wildlife
Appalachian Regional Commission
Ministry of Science and Technology
Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)
Cummings Foundation
National Research Council Sri Lanka
School of Energy Resources, University of Wyoming
Center for African Studies
Türkiye Atom Enerjisi Kurumu
H2020 European Research Council
Biomedical Research Foundation
Seventh Framework Programme246806
Seventh Framework Programme
Arizona-Nevada Academy of Science
Glycemic Index Foundation
Natural Sciences and Engineering Research Council of Canada
National Research Council Canada
Canada Foundation for Innovation
Science and Technology Facilities CouncilST/I005803/1, ST/J004944/1, ST/L001195/1, ST/J00474X/1, ST/M001407/1, ST/M004821/1, ST/I006080/1, ST/L006480/1, ST/I000186/1, ST/M002306/1, ST/M006980/1, ST/J004928/1, ST/L003414/1, GRIDPP, ST/G502320/1, ST/K001310/1, ST/L006464/1, ST/M001733/1, PP/D002915/1, ST/H00100X/1, ST/L000970/1, ST/L003112/1, ST/J005525/1, ST/H00100X/2, ST/K000705/1, ST/L003511/1, ST/M001504/1, ST/K001248/1, ST/L003325/1, ST/I000178/1, PP/E003087/1, ST/G50228X/1, PP/E000355/1, ST/K001418/1, ST/M001474/1, ST/I00372X/1, PP/E002846/1, ST/K003658/1, ST/J005487/1, ST/I006056/1, ST/K001302/1, ST/M003213/1, PP/E000444/1, ST/K00137X/1, ST/N000277/1, ST/J005576/1, ST/L001179/1
Science and Technology Facilities Council
Leverhulme Trust
Royal Society
European CommissionIN2P3-CNRS
European Commission
European Research Council
Australian Research Council
National Stroke Foundation
Neurosurgical Research Foundation
Department of Science and Technology, Ministry of Science and Technology, India
Minerva Foundation
Deutsche Forschungsgemeinschaft
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung156083
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Stichting voor Fundamenteel Onderzoek der Materie
Danmarks Grundforskningsfond
German-Israeli Foundation for Scientific Research and Development
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
National Science Council
Fundação para a Ciência e a Tecnologia
Bundesministerium für Bildung und Forschung
Chinese Academy of Sciences
Austrian Science Fund
Comisión Nacional de Investigación Científica y Tecnológica
Agencia Nacional de Promoción Científica y Tecnológica
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministerio de Economía y Competitividad
Foundation for Fundamental Research on Matter
Bundesministerium für Wissenschaft, Forschung und Wirtschaft
General Secretariat for Research and Technology
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Joint Institute for Nuclear Research
Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science
Israel Science Foundation
Instituto Nazionale di Fisica Nucleare
Narodowe Centrum Nauki
Javna Agencija za Raziskovalno Dejavnost RS
Ministerstwo Nauki i Szkolnictwa Wyższego
Ministry of Science and Technology, Taiwan
Georgian National Science Foundation
Israeli Centers for Research Excellence
Centre National pour la Recherche Scientifique et Technique
Bundesministerium für Bildung und Frauen
State Atomic Energy Corporation ROSATOM
Consejo Nacional de Innovación, Ciencia y Tecnología
Fundació Catalana de Trasplantament
Council on grants of the President of the Russian Federation
Sociedad Española de Reumatología
Institutul de Fizică Atomică


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