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The search for a standard model Higgs at the LHC and electron identification using transition radiation in the ATLAS tracker

Egede, Ulrik LU (1997)
Abstract
The Large Hadron Collider (LHC) will be ready for proton-proton collisions in the year 2005 and the ATLAS detector will be one of the two experiments at the LHC which will explore a new and higher energy range for particle physics. In this thesis, an analysis of the power of the ATLAS detector to detect a Standard Model Higgs boson has been performed. It is shown that it will be possible to discover a Higgs particle across the complete mass range from the lower limit defined by the reach of the LEP2 collider experiments to the upper theoretical limit around 1 TeV. The role of the inner tracking detector of ATLAS for the detection of conversions and the identification of the primary vertex in the detection of a Higgs particle in the H ->... (More)
The Large Hadron Collider (LHC) will be ready for proton-proton collisions in the year 2005 and the ATLAS detector will be one of the two experiments at the LHC which will explore a new and higher energy range for particle physics. In this thesis, an analysis of the power of the ATLAS detector to detect a Standard Model Higgs boson has been performed. It is shown that it will be possible to discover a Higgs particle across the complete mass range from the lower limit defined by the reach of the LEP2 collider experiments to the upper theoretical limit around 1 TeV. The role of the inner tracking detector of ATLAS for the detection of conversions and the identification of the primary vertex in the detection of a Higgs particle in the H -> photon photon decay channel is demonstrated with a detailed detector simulation. The identification of a 1 TeV Higgs particle requires a good understanding of both the signal and the backgrounds. The related uncertainties are covered in detail and it is shown that the Higgs can be identified in the H -> W W -> l nu j j, H -> Z Z -> l l nu nu and H -> Z Z -> l l j j decay channels. The Transition Radiation Tracker (TRT) is a combined tracking an electron identification device which will be a part of the inner tracking detector of ATLAS. For a prototype of the TRT the electron identification performance is analysed and it is shown that the full scale TRT together with the calorimeters will provide the electron identification power required for a clean electron and photon signal at the LHC. For the prototype a rejection factor of 100 against pions was achieved with an electron efficiency of 90%. The importance of the TRT for a clear detection of a Higgs particle is demonstrated. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Peach, Ken, CERN, Switzerland
organization
publishing date
type
Thesis
publication status
published
subject
keywords
quantum field theory, Elementary particle physics, tracker, Large Hadron Collider, pion rejection, pattern recognition, Elementarpartikelfysik, kvantfältteori, Fysicumarkivet A:1998:Egede
pages
195 pages
publisher
Elementary Particle Physics, Lund University, Box 118, 221 00 Lund, Sweden,
defense location
Lecture hall B, Physics Department
defense date
1998-01-16 01:04
external identifiers
  • Other:ISRN: LUNFD6(NFFL-7150)1997
ISBN
91-628-2804-5
language
English
LU publication?
yes
id
f9badc5a-c4e4-4a6c-b6e2-558e43621b3d (old id 18272)
date added to LUP
2007-05-24 11:21:04
date last changed
2016-09-19 08:45:07
@misc{f9badc5a-c4e4-4a6c-b6e2-558e43621b3d,
  abstract     = {The Large Hadron Collider (LHC) will be ready for proton-proton collisions in the year 2005 and the ATLAS detector will be one of the two experiments at the LHC which will explore a new and higher energy range for particle physics. In this thesis, an analysis of the power of the ATLAS detector to detect a Standard Model Higgs boson has been performed. It is shown that it will be possible to discover a Higgs particle across the complete mass range from the lower limit defined by the reach of the LEP2 collider experiments to the upper theoretical limit around 1 TeV. The role of the inner tracking detector of ATLAS for the detection of conversions and the identification of the primary vertex in the detection of a Higgs particle in the H -> photon photon decay channel is demonstrated with a detailed detector simulation. The identification of a 1 TeV Higgs particle requires a good understanding of both the signal and the backgrounds. The related uncertainties are covered in detail and it is shown that the Higgs can be identified in the H -> W W -> l nu j j, H -> Z Z -> l l nu nu and H -> Z Z -> l l j j decay channels. The Transition Radiation Tracker (TRT) is a combined tracking an electron identification device which will be a part of the inner tracking detector of ATLAS. For a prototype of the TRT the electron identification performance is analysed and it is shown that the full scale TRT together with the calorimeters will provide the electron identification power required for a clean electron and photon signal at the LHC. For the prototype a rejection factor of 100 against pions was achieved with an electron efficiency of 90%. The importance of the TRT for a clear detection of a Higgs particle is demonstrated.},
  author       = {Egede, Ulrik},
  isbn         = {91-628-2804-5},
  keyword      = {quantum field theory,Elementary particle physics,tracker,Large Hadron Collider,pion rejection,pattern recognition,Elementarpartikelfysik,kvantfältteori,Fysicumarkivet A:1998:Egede},
  language     = {eng},
  pages        = {195},
  publisher    = {ARRAY(0x86ea010)},
  title        = {The search for a standard model Higgs at the LHC and electron identification using transition radiation in the ATLAS tracker},
  year         = {1997},
}