Browsing Department of Physics and Technology by Subject "VDP::Mathematics and natural science: 400::Physics: 430::Nuclear and elementary particle physics: 431"
Now showing items 1-19 of 19
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Flavour structure of R-violating neutralino decays at the LHC
(Peer reviewed; Journal article, 2011-07-15)We study signatures of R-parity violation in the production of supersymmetric particles at the LHC, and the subsequent decay of the lightest neutralino being the end product of a supersymmetric cascade decay. In doing so, ... -
A Golden-Channel Higgs Decay
(Master thesis, 2011-06-01)With a Higgs mass greater than 190 GeV and lower than 300 GeV, the decay channel H --> ZZ --> 4l becomes what is referred to as the golden channel for Higgs decay (clean signal). Suppose a pair of on shell Zs with an ... -
Invariant Mass Distributions of SUSY Cascade Decays
(Master thesis, 2011-06-01)If supersymmetry (SUSY) is realised at experimental energies and R-parity is conserved, sparticles might be produced and decay in cascades at the LHC. A neutral LSP will escape detection, complicating the reconstruction ... -
L0/L1 trigger generation by the ALICE PHOS detector
(Doctoral thesis, 2011-12-14)Quark-Gluon Plasma (QGP) is a phase that exists above a critical temperature and corresponding energy density according to the theory of Quantum Chromo-Dynamics (QCD). The studies of the QGP help us to understand the early ... -
Limits on the production of the standard model Higgs boson in pp collisions at s=7 TeV with the ATLAS detector
(Peer reviewed; Journal article, 2011-09-20)A search for the Standard Model Higgs boson at the Large Hadron Collider (LHC) running at a centre-of-mass energy of 7 TeV is reported, based on a total integrated luminosity of up to 40 pb−1 collected by the ATLAS detector ... -
Luminosity determination in pp collisions at s=7 TeV using the ATLAS detector at the LHC
(Peer reviewed; Journal article, 2011-04-27)Measurements of luminosity obtained using the ATLAS detector during early running of the Large Hadron Collider (LHC) at s=7 TeV are presented. The luminosity is independently determined using several detectors and multiple ... -
Measurement of dijet production with a veto on additional central jet activity in pp collisions at ps = 7TeV using the ATLAS detector
(Peer reviewed; Journal article, 2011-09-12)A measurement of jet activity in the rapidity interval bounded by a dijet system is presented. Events are vetoed if a jet with transverse momentum greater than 20GeV is found between the two boundary jets. The fraction of ... -
Measurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector
(Peer reviewed; Journal article, 2011-02-03)Jet cross sections have been measured for the first time in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector. The measurement uses an integrated luminosity of 17 nb−1 recorded at the ... -
Measurement of W and Z production in proton-proton collisions at p s = 7 TeV with the ATLAS detector
(Peer reviewed; Journal article, 2011-09-14)We present studies of W and Z bosons with associated high energy photons produced in pp collisions at s=7 TeV. The analysis uses 35 pb−1 of data collected by the ATLAS experiment in 2010. The event selection requires W and ... -
Measurements of the Photonuclear Neutron Yield During Radiotherapy Using Bubble Detectors and Thermoluminescence Detectors
(Master thesis, 2010-02-22)Medical linear accelerators (linacs) used for radiotherapy with photons produce an undesirable neutron contribution as treatment energies exceed the (γ,n) threshold of the high-Z constituents of the linac. Secondary neutrons ... -
Measurements of underlying-event properties using neutral and charged particles in pp collisions at √ s = 900 GeV and √ s = 7 TeV with the ATLAS detector at the LHC
(Peer reviewed; Journal article, 2011-05-10)We present first measurements of charged and neutral particle-flow correlations in pp collisions using the ATLAS calorimeters. Data were collected in 2009 and 2010 at centre-of-mass energies of 900 GeV and 7 TeV. Events ... -
Nuclear methods for subsea fluid characterization
(Doctoral thesis, 2012-06-20) -
Performance of the High Level Trigger gamma-conversion reconstruction chain in the ALICE central tracking detectors
(Master thesis, 2011-06-01)Photons are produced through various processes in the particle and nuclei collisions at the LHC, and pose as useful probes of the formation of a Qaurk-Gluon Plasma. The probability of a photon converting within the central ... -
Production of pions, kaons and protons in pp collisions at s=900 GeV with ALICE at the LHC
(Peer reviewed; Journal article, 2011-06-15)The production of π +, π −, K+, K−, p, and p at mid-rapidity has been measured in proton-proton collisions at s=900 GeV with the ALICE detector. Particle identification is performed using the specific energy loss in the ... -
Search for single top quark production via contact interactions at LEP2
(Peer reviewed; Journal article, 2011-02-15)Single top quark production via four-fermion contact interactions associated to flavour-changing neutral currents was searched for in data taken by the DELPHI detector at LEP2. The data were accumulated at centre-ofmass ... -
Strange particle production in proton–proton collisions at s=09 with ALICE at the LHC The ALICE Collaboration
(Peer reviewed; Journal article, 2011-03-30)The production of mesons containing strange quarks (, φ) and both singly and doubly strange baryons (, , and ) are measured at mid-rapidity in pp collisions at s = 0.9 TeV with the ALICE experiment at the LHC. The results ... -
Studies of the performance of the ATLAS detector using cosmic-ray muons
(Peer reviewed; Journal article, 2011-03-29)Muons from cosmic-ray interactions in the atmosphere provide a high-statistics source of particles that can be used to study the performance and calibration of the ATLAS detector. Cosmic-ray muons can penetrate to the ... -
A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole
(Peer reviewed; Journal article, 2011-02-23)The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementarymethods are used to reconstruct the energy of weakly decaying b-hadrons, Eweak B ... -
Supersymmetry with Trilinear R-Parity Violation – Implications for Cosmology and the LHC
(Doctoral thesis, 2011-12-16)The current Standard Model of particle physics is sometimes referred to as one of the most successful theories ever constructed. When looking at the precision with which its predictions are being confirmed, it is easy to ...