Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 26 for “"event-by-event"”.
-
Jet study in ultra-relativistic heavy-ion collisions with the ALICE detectors at the LHC
… and optimised to reconstruct high-PT jets on an event-by-event basis. Optimisation of the algorithm parameters and methods used to suppress the large background energy contribution while maximising the algorithm efficiency, are discussed and the resulting jet energy and direction resolutions are …
-
Characterization of the initial-state and propagation of fluctuations in heavy-ion collisions
… how the distributions of the second and third event planes of anisotropic flow about their participant planes in the initial state evolve with the mean number of rescatterings in the system.<br /><br /> In the third part of the thesis we will study the generation of an anisotropic flow signal …
-
Charged multiplicity measurement for simulated pp events in the Compact Muon Solenoid (CMS) detector
… in the innermost layer of the pixel tracker. By using the relationship between pseudorapidity and deposited charge of the hits, we can distinguish between signal and background. We calculate a transformation function as the division of the average Monte Carlo track distribution by the average …
-
A time-of-flight spectrometer for fission fragment identification
… high-resolution time-of-flight spectrometer for event-by-event fission fragment identification. As a contribution to the project, a single module timing detector was designed and constructed to be fielded at the LANSCE facility at Los Alamos National Laboratory at a later date. The development …
-
Top quark mass measurement in the electron+jets decay channel using the Matrix Element Method
… a center of mass energy of 8 TeV. Data recorded by the Compact Muon Solenoid at CERN, were filtered in order to isolate collisions giving rise to a top anti-top quark pair. These quarks decay into an electron and four jets. For a recorded luminosity 19.8 fb-1, 8898 events were analyzed after a …
-
A Model for Abrasive Polymer Wear
… This regime of polymer wear is modeled on an event-by-event basis. The model utilizes a digitized profile of the metal surface, bulk polymer properties such as flow pressure and elongation at break, and a few system parameters such as load and slider geometry. The predictions of the model are …
-
An ionization chamber for fission fragment analysis
… which uses high resolution measurements and event-by-event analysis to increase the amount of nuclear fission data available [White]. As a collaborator, we are building and testing an ionization chamber to be used for the SPIDER project which will ultimately take place at the LANSCE facility …
-
Anisotropic Flow Measurement in Ultra-Central Pb-Pb Collisions For Run 10 and Run 11 by ALICE
… of the system (which fluctuates on an event by event basis). This indicates that the measurement of $v_n$ fluctuations are extremely sensitive to the initial state configuration. This thesis will analyze higher order cumulants, and investigate how they can constrain the initial state. …
-
CP-violation in cascade decays at the LHC
… decay chains at the LHC. Asymmetries composed by triple products of momenta of the final state particles are sensitive to CP-violating effects. We analytically calculate the cascade decays including the relevant spin correlations to compute the parton level asymmetry. In addition, we use Monte …
-
Detection of improvised explosive devices at long-range using coded aperture imaging of backscattered X-rays with dynamic reconstruction
… (DR), which continually back-projects detected events on an event-by-event basis. This research imaged multiple low-Z (polyethylene and water-filled), area targets with backscattered X-rays using standard medical imaging equipment, coded aperture masks with ideal bi-level autocorrelation …
-
Search for clustering of strange quarks in relativistic heavy ion collisions at the LHC
… of strangeness. The idea was supported by the enhanced production of strange carrying hadrons in heavy-ion collisions. Kaons are the lightest meson that carry the strange quark and thus they represent around 80% of the total strangeness in the system. We search for clusters of strange …
-
Strongly coupled plasmas and the QCD critical point
In this thesis, we begin by studying selected fluctuation observables in order to locate the QCD critical point in heavy-ion collision experiments. In particular, we look at the non-monotonic behavior as a function of the collision energy of higher, non-Gaussian, moments of the event-by-event …
-
Surface mapping based on the correlated emission of ions and electrons from hypervelocity C60 impacts
… projectiles in a sub-micrometer beam is hampered by limitations in source brightness and angular emission characteristics which are incompatible with tight focusing. An alternate approach to a focused beam is to reduce the beam intensity to less than 1000 impacts per second (referred to as the …
-
Early time dynamics & longitudinal structure of high-energy heavy-ion collisions
… dynamics of heavy-ion collisions by performing real-time lattice simulations, accompanied by analytical considerations within the framework of the Color Glass Condensate (CGC) effective theory of QCD. The central aim of this work is to relax the assumption of boost invariance and …
-
Ionization Chamber Design, Development, and Testing for the UNM Fission Fragment Spectrometer
… that will use high resolution measurements and event by-event analysis to add to the library of nuclear fission data. Our group at the University of New Mexico is working as a collaborator on the SPIDER project to achieve a mass resolution of 1 amu with our own UNM fission fragment spectrometer. …
-
Alignment of the LHCb Vertex Locator and lifetime measurements of two-body hadronic final states
… determine a lifetime acceptance function on an event-by-event basis is presented. These acceptance functions are crucial to account for a bias caused by the trigger selection. The un-binned maximum likelihood fitter based on this method does not rely on a parametrised model for the lifetime …
-
Pre-equilibrium photon and dilepton production from the early stages of high-energy heavy-ion collisions
… access. Initially far from equilibrium, it will eventually thermalize and transition to confined matter. Until today we have learned many things regarding the QGP but understanding it in its full glory is a challenging task and the need for observables that probe the QGP directly is …
-
Construction and Testing of a Portable Time Projection Chamber for Fast Neutron Detection
… imaging system that uses the light amplification by means of a micro-channel plate is also investigated, with a new approach to the data acquisition algorithms. New algorithms for data analysis were coupled with new techniques for event-by-event data handling. These were tested using data …
-
Measurement of non-flow correlations and elliptic flow fluctuations in Au+Au collisions at RHIC
… structures may be understood in terms of event-by-event fluctuations which result in a triangular anisotropy in the initial collision geometry of heavy ion collisions, which in turn leads to a triangular anisotropy in particle production. It is observed that similar correlation structures …
-
Monitoring energy performance in local authority buildings.
… gas (GHG) reduction target of 80% of 1990 levels by 2050 in response to a strong international commitment to reduce GHG emissions globally. This work is concerned with the management of energy consumption in buildings through the analysis of energy consumption data. Buildings are a key source of …
Page 1 of 2