LEADER 03881nam 22005535 450 001 9910254617003321 005 20200702214322.0 010 $a3-319-41051-2 024 7 $a10.1007/978-3-319-41051-7 035 $a(CKB)3710000000765458 035 $a(DE-He213)978-3-319-41051-7 035 $a(MiAaPQ)EBC4603157 035 $a(PPN)194513394 035 $a(EXLCZ)993710000000765458 100 $a20160720d2016 u| 0 101 0 $aeng 135 $aurnn|008mamaa 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aSearch for New Physics in tt ? Final States with Additional Heavy-Flavor Jets with the ATLAS Detector$b[electronic resource] /$fby Javier Montejo Berlingen 205 $a1st ed. 2016. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2016. 215 $a1 online resource (XIV, 283 p. 196 illus., 119 illus. in color.) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 311 $a3-319-41050-4 320 $aIncludes bibliographical references at the end of each chapters. 327 $aIntroduction -- Theoretical Framework -- Event Simulation -- Reconstruction of Physics Objects -- Common Aspects in Searches for New Physics in tt¯ Final States with Additional Heavy-Favor Jets -- Statistical Analysis -- Searches for New Physics in tt¯ Final States with Additional Heavy-Flavor Jets -- Conclusions. . 330 $aThis PhD thesis focuses on the search for new phenomena in top-antitop quark (tt) final states with additional b-quark jets at the LHC. It uses the full Run 1 dataset collected by the ATLAS experiment in proton-proton collisions at ?s=8 TeV. The final state of interest consists of an isolated lepton, a neutrino and at least six jets with at least four b-tagged jets, a challenging experimental signature owing to the large background from tt+heavy-flavor production. This final state is characteristic of ttH production, with the Higgs boson decaying into bb, a process that allows direct probing of the top-Higgs Yukawa coupling. This signature is also present in many extensions of the Standard Model that have been proposed as solutions to the hierarchy problem, such as supersymmetry or composite Higgs models, which predict the pair production of bosonic or fermionic top quark partners, or the anomalous production of four-top-quark events. All these physics processes have been searched for using an ambitious search strategy that has been developed on the basis of a combination of state-of-art theoretical predictions and a sophisticated statistical analysis to constrain in-situ the large background uncertainties. As a result, the most restrictive bounds to date on the above physics processes have been obtained. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 606 $aElementary particles (Physics) 606 $aQuantum field theory 606 $aString theory 606 $aElementary Particles, Quantum Field Theory$3https://scigraph.springernature.com/ontologies/product-market-codes/P23029 606 $aQuantum Field Theories, String Theory$3https://scigraph.springernature.com/ontologies/product-market-codes/P19048 615 0$aElementary particles (Physics). 615 0$aQuantum field theory. 615 0$aString theory. 615 14$aElementary Particles, Quantum Field Theory. 615 24$aQuantum Field Theories, String Theory. 676 $a539.72167 700 $aMontejo Berlingen$b Javier$4aut$4http://id.loc.gov/vocabulary/relators/aut$0810917 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910254617003321 996 $aSearch for New Physics in tt ? Final States with Additional Heavy-Flavor Jets with the ATLAS Detector$91814504 997 $aUNINA