Observation of an Excess in the Search for the Standard Model Higgs Boson Using Cuts Based Analyses at ALEPH

Kennedy, John Alan (2001) Observation of an Excess in the Search for the Standard Model Higgs Boson Using Cuts Based Analyses at ALEPH. PhD thesis, University of Glasgow.

Abstract

In 2000, the final year of LEP running, the LEP accelerator produced its highest ever collision energies with centre of mass energies reaching 210 GeV. In total 217 pb-1 of integrated luminosity were collected by the ALEPH detector. The collected data have been analysed using cuts based analyses for evidence of Standard Model Higgs boson production. An excess of high mass candidate events is observed, corresponding to a significance of 3.1sigma above the standard model background expectation, with much of this excess originating in the four jets final state. The production of a Higgs boson with a mass of ≈115 GeV/c2 is favoured if the observed excess is attributed to the production of a Standard Model Higgs boson.

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Additional Information: Adviser: Jim Lynch
• Keywords: High energy physics, Theoretical physics, Nuclear physics and radiation
• Date of Award: 2001
• Depositing User: Enlighten Team
• Unique ID: glathesis:2001-76055
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 19 Nov 2019 17:03
• Last Modified: 19 Nov 2019 17:03
• URI: https://theses.gla.ac.uk/id/eprint/76055