b Quark Tagging Performance and Higgs Detection via Top Production Using the ATLAS Detector

Pickford, Andrew Norman (2001) b Quark Tagging Performance and Higgs Detection via Top Production Using the ATLAS Detector. PhD thesis, University of Glasgow.

Abstract

The single particle response of the ATLAS Inner Detector has been simulated. The impact parameter resolution was parameterised as sigma (d0) = 11 ⊕ 59/pT mum and sigma(z0) = 85 ⊕ 94/pT mum with pT in GeV. The b-tagging performance was evaluated, for a b-tagging efficency eb = 0.5, the light quark rejection Ru = 83 +/- 6 for 97% silicon microstrip and pixel detector efficiency and Ru = 61 +/- 4 for 90% detector efficiency for 200 GeV jets. The viability for a Higgs boson search using the channel ttH → bW+bW-bb was examined. For a total integrated luminosity of 3 . 10e4pb-1 and a Higgs boson of mass mH = 80 GeV the signal significance was 11.7, for MH = 100 GeV 6.5, above mH = 110 GeV the signal significance fell below the 5sigma level.

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Additional Information: Adviser: Kenway Smith
• Keywords: High energy physics, Nuclear physics and radiation
• Date of Award: 2001
• Depositing User: Enlighten Team
• Unique ID: glathesis:2001-74955
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 27 Sep 2019 15:00
• Last Modified: 27 Sep 2019 15:00
• URI: https://theses.gla.ac.uk/id/eprint/74955