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Title: Probing bb production with the ATLAS detector at the LHC
Author: Davison, P. R.
ISNI:       0000 0004 8503 4946
Awarding Body: UCL (University College London)
Current Institution: University College London (University of London)
Date of Award: 2016
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This thesis describes the measurement of b b production with two different techniques, both using the ATLAS detector at the LHC. Firstly Z + b b events are measured using 7 TeV data collected in 2011. The Z-boson was reconstructed using pairs of leptons, with the b-jets used to tag the presence of B-hadrons. The cross-section was measured as a function of four variables and compared to theoretical predictions. NLO predictions from MCFM and aMC@NLO best reproduce the data with a discrepancy seen at low angular separation of the b-jets. Secondly inclusive b b production is probed using the decay of B-hadrons to muons using the 8 TeV data collected by ATLAS in 2012. Differential cross-sections were measured as a function of six variables and compared to predictions from Pythia8 and Herwig++. In general the shape of data was well reproduced by the Herwig++ prediction.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available