@misc{10481/67205,
year = {2020},
url = {http://hdl.handle.net/10481/67205},
abstract = {This paper describes a search for beyond the Standard Model decays of the Higgs boson into a pair of new spin-0 particles subsequently decaying into b-quark pairs, H→aa→(b¯b)(b¯b), using proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider at center-of-mass energy √s=13  TeV. This search focuses on the range 15  GeV≤ma≤30  GeV, where the decay products are collimated; it is complementary to a previous search in the same final state targeting the range 20  GeV≤ma≤60  GeV, where the decay products are well separated. A novel strategy for the identification of the a→b¯b decays is deployed to enhance the efficiency for topologies with small separation angles. The search is performed with 36  fb−1 of integrated luminosity collected in 2015 and 2016 and sets upper limits on the production cross section of H→aa→(b¯b)(b¯b), where the Higgs boson is produced in association with a Z boson.},
organization = {ANPCyT},
organization = {YerPhI, Armenia},
organization = {Australian Research Council},
organization = {BMWFW, Austria},
organization = {Austrian Science Fund (FWF)},
organization = {Azerbaijan National Academy of Sciences (ANAS)},
organization = {SSTC, Belarus},
organization = {National Council for Scientific and Technological Development (CNPq)},
organization = {Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)},
organization = {Natural Sciences and Engineering Research Council of Canada (NSERC)},
organization = {NRC, Canada},
organization = {Canada Foundation for Innovation},
organization = {CERN},
organization = {ANID, Chile},
organization = {Chinese Academy of Sciences},
organization = {Ministry of Science and Technology, China},
organization = {National Natural Science Foundation of China (NSFC)},
organization = {Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias},
organization = {Ministry of Education, Youth & Sports - Czech Republic

Czech Republic Government},
organization = {Czech Republic Government},
organization = {DNRF, Denmark},
organization = {Danish Natural Science Research Council},
organization = {Centre National de la Recherche Scientifique (CNRS)},
organization = {CEA-DRF/IRFU, France},
organization = {SRNSFG, Georgia},
organization = {Federal Ministry of Education & Research (BMBF)},
organization = {HGF, Germany},
organization = {Max Planck Society},
organization = {Greek Ministry of Development-GSRT},
organization = {RGC, China},
organization = {Hong Kong SAR, China},
organization = {Israel Science Foundation},
organization = {Benoziyo Center, Israel},
organization = {Istituto Nazionale di Fisica Nucleare (INFN)},
organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)},
organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)

Japan Society for the Promotion of Science},
organization = {CNRST, Morocco},
organization = {Netherlands Organization for Scientific Research (NWO)

Netherlands Government},
organization = {RCN, Norway},
organization = {Ministry of Science and Higher Education, Poland},
organization = {NCN, Poland},
organization = {Portuguese Foundation for Science and Technology

European Commission},
organization = {MNE/IFA, Romania},
organization = {MES of Russia, Russia Federation},
organization = {NRC KI, Russia Federation},
organization = {JINR},
organization = {MESTD, Serbia},
organization = {MSSR, Slovakia},
organization = {Slovenian Research Agency - Slovenia},
organization = {MIZS, Slovenia},
organization = {DST/NRF, South Africa},
organization = {Spanish Government},
organization = {SRC, Sweden},
organization = {Wallenberg Foundation, Sweden},
organization = {SERI, Switzerland},
organization = {Swiss National Science Foundation (SNSF)},
organization = {Canton of Bern, Switzerland},
organization = {Canton of Geneva, Switzerland},
organization = {Ministry of Science and Technology, Taiwan},
organization = {Ministry of Energy & Natural Resources - Turkey},
organization = {UK Research & Innovation (UKRI)

Science & Technology Facilities Council (STFC)},
organization = {United States Department of Energy (DOE)},
organization = {National Science Foundation (NSF)},
organization = {BCKDF, Canada},
organization = {Compute Canada, Canada},
organization = {CRC, Canada},
organization = {European Research Council (ERC)},
organization = {ERDF, European Union},
organization = {Horizon 2020, European Union},
organization = {Marie Sklodowska-Curie Actions, European Union},
organization = {COST, European Union},
organization = {French National Research Agency (ANR)},
organization = {German Research Foundation (DFG)},
organization = {Alexander von Humboldt Foundation},
organization = {EU-ESF, Greece},
organization = {Greek NSRF, Greece},
organization = {BSF-NSF, Israel},
organization = {German-Israeli Foundation for Scientific Research and Development},
organization = {La Caixa Banking Foundation, Spain},
organization = {CERCA Programme Generalitat de Catalunya, Spain},
organization = {PROMETEO Programme Generalitat Valenciana, Spain},
organization = {GenT Programme Generalitat Valenciana, Spain},
organization = {Goran Gustafssons Stiftelse, Sweden},
organization = {Royal Society of London},
organization = {Leverhulme Trust},
publisher = {AMER PHYSICAL SOC},
title = {Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at √s=13  TeV},
doi = {10.1103/PhysRevD.102.112006},
author = {Atlas Collaboration and Aguilar Saavedra, Juan Antonio},
}