2017 Theses Doctoral
A search for new diboson resonances in the boosted semi-leptonic final state at โ๐ = 13 TeV with the ATLAS detector
A search is presented for new resonances decaying to a pair of boosted Standard Model bosons, ๐๐ , where the ๐ boson decays leptonically (๐ โ ๐๐, with ๐ = ๐,๐) and the other weak boson, ๐ (๐=๐,Z), decays hadronically (๐ โ ๐๐ฬยด/๐๐ฬ, with ๐, ๐ยด = ๐ข, ๐, ๐, ๐ , ๐). The data were collected with the ATLAS detector at the CERN Large Hadron Collider, during the 2015 and 2016 periods of ๐๐ collisions, at a center-of-mass energy โs = 13 TeV, and correspond to a total integrated luminosity of 36.1 fbโปยน.
The hadronic decay of the boosted ๐ boson is reconstructed as a single large-radius jet, and the leptonic decay of the W boson is reconstructed as a lepton and missing transverse energy. The search is sensitive to resonances produced with quark-antiquark fusion, gluon-gluon fusion, and vector-boson fusion.
No significant excesses are observed above the Standard Model background prediction. Upper limits on production cross section times branching ratio to WV are set at a 95 % confidence level for selected benchmark signal models. Models of a neutral, narrow scalar boson (spin-0), charged and neutral vector bosons (spin-1) coupling to the Standard Model gauge bosons, and a neutral Randall-Sundrum bulk graviton (spin-2) are considered. The search significantly improves the limits produced in recent searches.
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Files
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Carbone_columbia_0054D_14244.pdf application/pdf 5.32 MB Download File
More About This Work
- Academic Units
- Physics
- Thesis Advisors
- Parsons, John
- Degree
- Ph.D., Columbia University
- Published Here
- October 10, 2017