Search for an invisibly decaying Higgs boson or dark matter candidates produced √ in association with a Z boson in pp collisions at s = 13 TeV with the ATLAS detector
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Aaboud, M., Aad, G., Abbott, B., Abeloos, B., Abidi, S. H., AbouZeid, O. S., ... & Abulaiti, Y. (2018). Search for an invisibly decaying Higgs boson or dark matter candidates produced in association with a Z boson in pp collisions at s= 13TeV with the ATLAS detector. Physics Letters B, 776, 318-337. [DOI: 10.1016/j.physletb.2017.11.049]
SponsorshipANPCyT YerPhI, Armenia Australian Research Council BMWFW, Austria Austrian Science Fund (FWF) Azerbaijan National Academy of Sciences (ANAS) SSTC, Belarus National Council for Scientific and Technological Development (CNPq) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Natural Sciences and Engineering Research Council of Canada NRC, Canada Canada Foundation for Innovation CERN Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) Chinese Academy of Sciences Ministry of Science and Technology, China National Natural Science Foundation of China Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government Czech Republic Government Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias DNRF, Denmark Danish Natural Science Research Council IN2P3-CNRS, CEA-DSM/IRFU, France SRNSF, Georgia Federal Ministry of Education & Research (BMBF) HGF Max Planck Society Greek Ministry of Development-GSRT Hong Kong Research Grants Council ISF, I-CORE Benoziyo Center, Israel Istituto Nazionale di Fisica Nucleare (INFN) Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science CNRST, Morocco Netherlands Organization for Scientific Research (NWO) Netherlands Government RCN, Norway Ministry of Science and Higher Education, Poland NCN, Poland Portuguese Foundation for Science and Technology MNE/IFA, Romania MES of Russia NRC KI, Russian Federation JINR MESTD, Serbia MSSR, Slovakia Slovenian Research Agency - Slovenia MIZS, Slovenia DST/NRF, South Africa MINECO, Spain SRC Wallenberg Foundation, Sweden SERI Swiss National Science Foundation (SNSF) Cantons of Bern and Geneva, Switzerland Ministry of Science and Technology, Taiwan Ministry of Energy & Natural Resources - Turkey Science & Technology Facilities Council (STFC) United States Department of Energy (DOE) National Science Foundation (NSF) BCKDF Canada Council CANARIE Australian Government Department of Industry, Innovation and Science Cooperative Research Centres (CRC) Programme Compute Canada FQRNT Ontario Innovation Trust, Canada EPLANET European Research Council (ERC) European Union (EU) FP7 Horizon 2020 Marie Sklodowska-Curie Actions European Union (EU) French National Research Agency (ANR) French National Research Agency (ANR) Region Auvergne-Rhone-Alpes German Research Foundation (DFG) Alexander von Humboldt Foundation Herakleitos Thales and Aristeia programmes co-financed by EU-ESF Greek Ministry of Development-GSRT US-Israel Binational Science Foundation German-Israeli Foundation for Scientific Research and Development Minerva, Israel BRF, Norway CERCA Programme Generalitat de Catalunya Generalitat Valenciana Royal Society of London Leverhulme Trust
A search for an invisibly decaying Higgs boson or dark matter candidates produced in association with a leptonically decaying Z boson in proton–proton collisions at √s = 13 TeV is presented. This search uses 36.1 fb−1 of data collected by the ATLAS experiment at the Large Hadron Collider. No significant deviation from the expectation of the Standard Model backgrounds is observed. Assuming the Standard Model Z H production cross-section, an observed (expected) upper limit of 67% (39%) at the 95% confidence level is set on the branching ratio of invisible decays of the Higgs boson with mass mH = 125 GeV. The corresponding limits on the production cross-section of the Z H process with the invisible Higgs boson decays are also presented. Furthermore, exclusion limits on the dark matter candidate and mediator masses are reported in the framework of simplified dark matter models.