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.

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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: http://theses.gla.ac.uk/id/eprint/74955

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