Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in √s = 8 TeV pp collisions with the ATLAS detector
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Aad, G., Abajyan, T., Abbott, B. et al. Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in s√=8 TeV pp collisions with the ATLAS detector. J. High Energ. Phys. 2013, 189 (2013). [https://doi.org/10.1007/JHEP10(2013)189]
SponsorshipANPCyT; YerPhI, Armenia; Australian Research Council; BMWF, 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; 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; Max Planck Society; Alexander von Humboldt Foundation; Science & Technology Facilities Council (STFC) ST/G006717/1 ST/K501840/1 GRIDPP ST/J004944/1 ST/J500641/1 ST/I000186/1 ST/H001042/2 PP/E003699/2 ST/F00754X/1 ST/K00137X/1 ST/K001361/1 MINOS/MINOS+ ST/H00095X/1 PP/E003087/1 ST/F007337/1 PP/E000487/1 ST/H001093/1 ST/J005576/1 ST/K000659/1 ST/K501840/1 ST/K003496/1 GRIDPP ST/J005460/1 ST/I006080/1 ST/K001248/1 ST/K003437/1 GRIDPP ST/K50208X/1 ST/L001144/1 ST/L00352X/1 ST/K001388/1 ST/K003496/1 ST/K003658/1 GRIDPP ST/L001004/1 ST/M001474/1 ST/K003658/1 ST/I505756/1 ATLAS ST/F007418/1 ST/H001093/2 ST/J004936/1 ST/K001361/1 LHCb ST/K001361/1 ATLAS ST/K001337/1 ST/K00073X/1 PP/E003699/1 ST/J005568/1 ST/K001361/1 ATLAS Upgrades ST/K001361/1 LHCb Upgrades ST/K003437/1 ST/K00140X/1 ST/J002798/1 PP/E000347/1 GRIDPP ST/K001329/1 ATLAS ST/J004928/1 ST/K001337/1 ATLAS ST/M001431/1 ST/M000761/1 ST/L000970/1 ATLAS Upgrade ST/I005803/1 ST/J005541/1 ST/M000664/1 ST/K001264/1 ATLAS ST/I005803/1 GRIDPP PP/E002757/1 ST/J501074/1 ST/H001069/2 ST/G502320/1 ST/L00335X/1 ST/K00140X/1 ATLAS ST/J004804/1 ST/L003325/1 ST/H001042/1 ST/H00095X/2 ST/K000713/1 ST/L001209/1 ATLAS Upgrades ST/I005811/1 ST/J004928/1 ATLAS Upgrade ST/K000195/1 ST/K001361/1 ST/L000970/1; ICREA
The results of a search for pair production of supersymmetric partners of the Standard Model third-generation quarks are reported. This search uses 20.1 fb−1 of pp collisions at √s = 8 TeV collected by the ATLAS experiment at the Large Hadron Collider. The lightest bottom and top squarks (˜b1 and t˜1 respectively) are searched for in a final state with large missing transverse momentum and two jets identified as originating from b-quarks. No excess of events above the expected level of Standard Model background is found. The results are used to set upper limits on the visible cross section for processes beyond the Standard Model. Exclusion limits at the 95% confidence level on the masses of the third-generation squarks are derived in phenomenological supersymmetric R-parityconserving models in which either the bottom or the top squark is the lightest squark. The ˜b 1 is assumed to decay via ˜b1 → bχ˜0 1 and the t˜1 via t˜1 → bχ˜± 1 , with undetectable products of the subsequent decay of the ˜ χ± 1 due to the small mass splitting between the ˜ χ± 1 and the ˜ χ0 1.