Standard Model Higgs boson analysis via associated top production and hadronic decay using the ATLAS detector at the CERN LHC

Shaw, Christian Alexander (2007) Standard Model Higgs boson analysis via associated top production and hadronic decay using the ATLAS detector at the CERN LHC. PhD thesis, University of Glasgow.

Abstract

A search for the Higgs boson using the ATLAS detector at the Large Hadron Collider is outlined. The channel is associated Higgs boson production ttH and subsequent decay via H → bb for a Higgs mass of 110 - 130 GeV. The major backgrounds ttbb and ttjj are simulated with matrix element generators, at leading order and next to leading order respectively. A cuts based analysis is used to maximise significance, however K-factors are not used. A comparison is also made between results from the cone (with radius 0.4) and kT (with R parameter 0.45) jet reconstruction algorithms. For the cone algorithm, significances of 2.4, 1.5 and 1.0 were found for Higgs masses 110, 120 and 130 GeV, respectively. For the kT algorithm, significances of 2.4, 1.6 and 1.1 were found for Higgs masses 110, 120 and 130 GeV, respectively. The quoted significances are for an integrated luminosity of 30 fb[-1].

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Additional Information: Adviser: David Saxon
• Keywords: Theoretical physics, High energy physics
• Date of Award: 2007
• Depositing User: Enlighten Team
• Unique ID: glathesis:2007-73999
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 23 Sep 2019 15:33
• Last Modified: 23 Sep 2019 15:33
• URI: https://theses.gla.ac.uk/id/eprint/73999