A measurement and a search, both involving high transverse momentum bosons decaying to b-quarks, are performed using a dataset of proton-proton collisions at √s = 8 TeV, collected in 2012 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 19.5 inverse fb. The production cross section of Z → bb is measured, where the Z boson has high transverse momentum. The measured value of the fiducial cross section is found to be in good agreement with next-to-leading-order Standard Model predictions. A search is made for TeV-scale resonances decaying via a pair of Higgs bosons to the b ̄bb ̄b final state. The graviton excitation, G*, in the bulk Randall-Sundrum model is used as a baseline signal model. No evidence of a resonance is found. Upper limits are set on σ(pp→G*) x BR(G*→HH→bbbb).
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:626698 |
| Date | January 2014 |
| Creators | Lambourne, L. |
| Publisher | University College London (University of London) |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://discovery.ucl.ac.uk/1431320/ |
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