Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
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Aad, G., Abbott, B., Abdallah, J. et al. Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector. J. High Energ. Phys. 2015, 117 (2015). [https://doi.org/10.1007/JHEP04(2015)117]
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; 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; EPLANET; European Research Council (ERC); NSRF; European Union (EU); Centre National de la Recherche Scientifique (CNRS); CEA-DSM/IRFU, France; GNSF, 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; NSRF, Greece; RGC, China; Hong Kong SAR, China; Israel Science Foundation; MINERVA, Israel; German-Israeli Foundation for Scientific Research and Development; I-CORE, 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) Netherlands Government; BRF, Norway; RCN, Norway; Ministry of Science and Higher Education, Poland; NCN, Poland; GRICES, Portugal; Portuguese Foundation for Science and Technology; MNE/IFA, Romania; MES of Russia; ROSATOM; Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia; MIZ. S, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC, Sweden; Wallenberg Foundation, Sweden; SER Switzerland; Swiss National Science Foundation (SNSF); Cantons of Bern and Geneva, Switzerland; National Science Council of Taiwan; Ministry of Energy & Natural Resources - Turkey; Royal Society of London; Leverhulme Trust; United States Department of Energy (DOE); National Science Foundation (NSF); Science & Technology Facilities Council (STFC) ST/L003325/1 ST/K001310/1 ATLAS ST/J004928/1 ST/M000761/1 ST/K001264/1 ATLAS ST/J00474X/1 ST/I005803/1 ST/I000178/1 1521422 1366825 1201187 ST/M006980/1 ATLAS Upgrades ST/I005803/1 GRIDPP ST/J004928/1 ATLAS Upgrades ST/K00073X/1 ST/K001361/1 ATLAS ST/K001361/1 LHCb ST/L000970/1 ATLAS Upgrade ST/M000664/1 ST/M001407/1 1575161 PP/E003087/1 ST/I006056/1 ST/K001361/1 ATLAS Upgrades ST/M002306/1 ST/M004821/1 ST/M503575/1 ATLAS ST/H00100X/1 ST/L000326/1 ST/N000307/1 ST/L001209/1 ATLAS Upgrades ST/L000970/1 ATLAS Upgrades ST/K001248/1 ST/L00352X/1 ST/M002306/1 ATLAS Upgrades ST/L001195/1 ST/K50208X/1 ST/K001310/1 LHCb Upgrades ST/K001310/1 ATLAS Upgrades ST/K001361/1 LHCb Upgrades ST/J005525/1 ST/K001388/1 ST/M001474/1 ST/M001504/1 ST/K001302/1 PP/E000355/1 ST/L001144/1 ST/L001179/1 1082012 GRIDPP PP/E002846/1 ST/K001310/1 ST/H00100X/2 ST/K001329/1 ST/L001179/1 ATLAS Upgrades PP/D002915/1 ST/K00140X/1 ST/L000970/1 ST/M007103/1 ATLAS Upgrades ST/H001093/1 ST/J005576/1 ST/K003658/1 ST/M001733/1 ST/J00474X/1 ATLAS Upgrades ST/I00372X/1 ST/M006980/1 ST/M001431/1 ST/L003414/1 ST/K001361/1 MINOS/MINOS+ ST/J005487/1 ST/I000186/1 ST/K00137X/1 ST/L006480/1 ST/M003213/1 PP/E000347/1 1104906 ST/I006056/1 ATLAS Upgrade ST/J004944/1 ST/K001418/1 ST/K001361/1 ST/M004821/1 GRIDPP ST/K001426/1 ATLAS ST/N000463/1 1366364 ST/G502320/1 ST/L001179/1 ATLAS Upgrade ST/K003658/1 GRIDPP ST/I006056/1 ATLAS Upgrades ST/J004928/1 ATLAS Upgrade ST/H001093/2 ST/G50228X/1 PP/E000444/1 ST/I00372X/1 GRIDPP ST/K000705/1 ST/K001310/1 LHCb ST/L003112/1 ST/I006080/1 ST/J501074/1 ST/M002071/1 ATLAS Upgrades; ICREA
Results of a search for H → ττ decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 fb−1 and 20.3 fb−1 at centre-of-mass energies of s√=7 TeV and s√=8 TeV respectively. All combinations of leptonic (τ→ℓνν¯¯¯ with ℓ = e, μ) and hadronic (τ → hadrons ν) tau decays are considered. An excess of events over the expected background from other Standard Model processes is found with an observed (expected) significance of 4.5 (3.4) standard deviations. This excess provides evidence for the direct coupling of the recently discovered Higgs boson to fermions. The measured signal strength, normalised to the Standard Model expectation, of μ = 1. 43 + 0.43− 0.37 is consistent with the predicted Yukawa coupling strength in the Standard Model.