Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC

Aad, G.; Aguilar Saavedra, Juan Antonio; Atlas Collaboration

doi:10.1016/j.physletb.2012.08.020

1-s2.0-S037026931200857X-main.pdf (1.519Mb)

Identificadores

URI: http://hdl.handle.net/10481/62523

DOI: 10.1016/j.physletb.2012.08.020

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Editorial

Elsevier

Fecha

2012-09-17

Referencia bibliográfica

Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Khalek, S. A., Abdelalim, A. A., ... & AbouZeid, O. S. (2012). Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC. Physics Letters B, 716(1), 1-29. [https://doi.org/10.1016/j.physletb.2012.08.020]

Patrocinador

ANPCyT; YerPhI, Armenia; Australian Research Council; BMWF, Austria; 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; Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias; Ministry of Education, Youth & Sports - Czech Republic; Czech Republic Government; DNRF, Denmark; Danish Natural Science Research Council; Lundbeckfonden; European Union (EU); European Research Council (ERC); Centre National de la Recherche Scientifique (CNRS); CEA-DSM/IRFU, France; GNAS, Georgia; Federal Ministry of Education & Research (BMBF); German Research Foundation (DFG); HGF, Germany; Max Planck Society; Alexander von Humboldt Foundation; Greek Ministry of Development-GSRT; Israel Science Foundation; German-Israeli Foundation for Scientific Research and Development; DIP, Israel; Benoziyo Center, Israel; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Japan Society for the Promotion of Science; CNRST, Morocco; FOM (The Netherlands); Netherlands Government; Netherlands Organization for Scientific Research (NWO); RCN, Norway; Ministry of Science and Higher Education, Poland; GRICES, Portugal; Portuguese Foundation for Science and Technology; MERYS (MECTS), Romania; MES of Russia; Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; MVZT, Slovenia; Slovenian Research Agency - Slovenia; DST/NRF, South Africa; Spanish Government; SRC, Sweden; Wallenberg Foundation, Sweden; SER, Switzerland; Swiss National Science Foundation (SNSF); Cantons of Bern, Switzerland; Geneva, Switzerland; National Science Council of Taiwan; Ministry of Energy & Natural Resources - Turkey; Science & Technology Facilities Council (STFC); Royal Society of London; Leverhulme Trust; United States Department of Energy (DOE); National Science Foundation (NSF); Science & Technology Facilities Council (STFC) ST/K001310/1 LHCb Upgrades ST/I003525/1 ST/H001042/2 ST/K001310/1 ST/K001310/1 ATLAS Upgrades ST/K001361/1 ST/K00140X/1 ST/K003658/1 ST/I006080/1 ST/I005803/1 GRIDPP ST/H001069/2 ST/L001195/1 ST/L000970/1 PP/E000347/1 ST/J002798/1 GRIDPP ST/K001361/1 ATLAS Upgrades ST/L001004/1 ST/J005576/1 ST/J004944/1 ATLAS ST/I003517/1 ST/K001329/1 ATLAS ST/G502320/1 ST/K000705/1 ST/K00073X/1 ST/K001310/1 ATLAS ST/K001337/1 ST/M000761/1 PP/E003087/1 PP/E003699/2 ST/I000186/1 ST/K003658/1 GRIDPP ST/L000970/1 ATLAS Upgrade ST/J004928/1 ST/I005803/1 PP/E002757/1 PP/E000355/1 PP/E003699/1 ST/K00140X/1 ATLAS ST/K501840/1 GRIDPP ST/H00100X/2 ST/K001361/1 MINOS/MINOS+ ST/K001361/1 LHCb Upgrades ST/K001248/1 ST/F007337/1 ST/K001361/1 ATLAS ST/K001264/1 ATLAS ST/H001042/1 ST/H00100X/1 ST/J005460/1 ST/K001248/1 ATLAS ST/K001418/1 ST/K001337/1 ATLAS ST/J004928/1 ATLAS Upgrade ST/I005811/1 ST/H001093/2 ST/H001026/2 ST/M001474/1 ST/K501840/1 ST/K001361/1 LHCb ST/K001310/1 LHCb ST/I003142/1 ST/H001093/1 ST/H001026/1 ST/L001144/1 ST/M001431/1 ICREA

Resumen

A search for the Standard Model Higgs boson in proton–proton collisions with the ATLAS detector at the LHC is presented. The datasets used correspond to integrated luminosities of approximately 4.8 fb−1 collected at √s = 7 TeV in 2011 and 5.8 fb−1 at √s = 8 TeV in 2012. Individual searches in the channels H → Z Z(∗) → 4 , H → γγ and H → W W (∗) → eνμν in the 8 TeV data are combined with previously published results of searches for H → Z Z(∗), W W (∗), bb¯ and τ +τ − in the 7 TeV data and results from improved analyses of the H → Z Z(∗) → 4 and H → γγ channels in the 7 TeV data. Clear evidence for the production of a neutral boson with a measured mass of 126.0±0.4 (stat)±0.4 (sys) GeV is presented. This observation, which has a significance of 5.9 standard deviations, corresponding to a background fluctuation probability of 1.7× 10−9, is compatible with the production and decay of the Standard Model Higgs boson.

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