Download Search for New Physics in tt ̅ Final States with Additional by Javier Montejo Berlingen PDF

By Javier Montejo Berlingen

This doctoral thesis makes a speciality of the hunt for brand spanking new phenomena in top-antitop quark (tt) ultimate states with extra b-quark jets on the LHC. It makes use of the entire Run 1 dataset accrued by means of the ATLAS scan in proton-proton collisions at √s=8 TeV. the ultimate kingdom of curiosity comprises an remoted lepton, a neutrino and a minimum of six jets with no less than 4 b-tagged jets, a not easy experimental signature as a result of the massive heritage from tt+heavy-flavor creation. This ultimate nation is attribute of ttH creation, with the Higgs boson decaying into bb, a procedure that permits direct probing of the top-Higgs Yukawa coupling. This signature can also be found in many extensions of the traditional version which were proposed as ideas to the hierarchy challenge, equivalent to supersymmetry or composite Higgs versions, which expect the pair construction of bosonic or fermionic best quark companions, or the anomalous construction of four-top-quark occasions. these types of physics tactics were looked for utilizing an formidable seek approach that has been built at the foundation of a mixture of state-of-art theoretical predictions and a worldly statistical research to constrain in-situ the massive history uncertainties. therefore, the main restrictive bounds so far at the above physics approaches were obtained.

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