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Full-Text Articles in Physics
Probing New Physics Through Third Generation Leptons, Preet Sharma
Probing New Physics Through Third Generation Leptons, Preet Sharma
Electronic Theses and Dissertations
This dissertation is a study of beyond standard model physics or new physics. The third generation charged lepton -the τ -is an excellent probe of new physics (NP) because of it being the heaviest lepton. As the heaviest lepton, it has the largest coupling ( among the leptons) to the Higgs boson in the Standard Model (SM). New physics contributions to the tau-neutrino nucleon scattering were considered. Charged Higgs and W' effects to the deep inelastic scattering ντ ( [special character omitted]τ) + N → τ− (τ+) + X in the neutrino-nucleon interactions has been studied. The neutrino detection process …
The Behavior Of A Macroscopic Granular Material In Vortex Flow, Asami Nishikawa
The Behavior Of A Macroscopic Granular Material In Vortex Flow, Asami Nishikawa
Electronic Theses and Dissertations
A granular material is defined as a collection of discrete particles such as powder and grain. Granular materials display a large number of complex behaviors. In this project, the behavior of macroscopic granular materials under tornado-like vortex airflow, with varying airflow velocity, was observed and studied. The experimental system was composed of a 9.20-cm inner diameter acrylic pipe with a metal mesh bottom holding the particles, a PVC duct, and an airflow source controlled by a variable auto-transformer, and a power-meter. A fixed fan blade was attached to the duct's inner wall to create a tornado-like vortex airflow from straight …
Shear Waves In Highly Concentrated Viscoelastic Wormlike Micellar Fluid, Rachel B. Crim
Shear Waves In Highly Concentrated Viscoelastic Wormlike Micellar Fluid, Rachel B. Crim
Honors Theses
Wormlike micellar fluids form by the self-aggregation of surfactant molecules in aqueous solution. These non-Newtonian fluids have been well studied and are used in the oil industry, hydraulics, and medical research. However, little is known regarding the structure of the three-dimensional networks in which the worms become entangled and possibly branched, especially at high concentrations. What is known is that this composition results in two distinctive fluid characteristics: viscoelasticity and strain-birefringence. The latter is exploited in this work in order to study the shear wave speed and attenuation in 500/300mM CTAB/NaSal fluid. Three different experiments were conducted using either a …
Detector Characterization Analysis Of The Initial Laser Interferometer Gravitational-Wave Observatory (Ligo) Using Principal Component Analysis (Pca), Daniel Duddleston
Detector Characterization Analysis Of The Initial Laser Interferometer Gravitational-Wave Observatory (Ligo) Using Principal Component Analysis (Pca), Daniel Duddleston
Honors Theses
The purpose of this thesis is to investigate transient noise events in data from the initial Laser Interferometer Gravitational-Wave Observatory (LIGO) and to test detector characterization software developed by the LIGO Scientific Collaboration (LSC). Detector characterization is the process of identifying and removing noise that corrupts the data stream of the LIGO detectors. This is vital to improving the sensitivity of the LIGO interferometer and increasing the probability of detecting gravitational waves of astrophysical origin. The data analyzed in this thesis were collected in 2010 during the S6 (Enhanced LIGO) science run. Two software tools, PCAT and Omega Scans, were …
Group Velocity Of Acoustic Waves In Plates Of Electronic Materials, Saminda Adikaram
Group Velocity Of Acoustic Waves In Plates Of Electronic Materials, Saminda Adikaram
Electronic Theses and Dissertations
In this study the propagation and dispersion characteristics of plate acoustic waves (PAW) in electronic materials are investigated experimentally. Plate acoustic waves are elastic waves that travel along a plate with thickness comparable to the wavelength of the waves. Lamb waves, a type of plate acoustic wave, have particle motion in the direction of propagation and normal to the plate. Unlike an infinite medium, plates support two sets of Lamb wave modes (symmetric and anti-symmetric) with unique velocities which depend on the relationship between the wavelength and the thickness of the plate. Out of this, two zero order modes (so …
Higgs Effects In Neutrino Physics And Heavy Quark Systems, Ahmed Rashed
Higgs Effects In Neutrino Physics And Heavy Quark Systems, Ahmed Rashed
Electronic Theses and Dissertations
This work presents a study of the effects of multi-Higgs doublets on the properties of neutrino sector and heavy quark systems. The phenomenological implications of multi-Higgs models, which contain multi-Higgs doublets, in the neutrino and quark sector are discussed in this dissertation. The two-Higgs-doublet model (2HDM), in which two Higgs doublets are introduced, is the simplest extension to the scalar sector of the standard model (SM). A new boson state was recently seen in the CMS (Compact Muon Solenoid) and ATLAS (A Toroidal LHC Apparatus) experiments at the LHC (Large Hadron Collider). We investigate the multi-Higgs models contributions in understanding …
Cosmological And Astrophysical Tests Of Modified Gravity, Caixia Gao
Cosmological And Astrophysical Tests Of Modified Gravity, Caixia Gao
Electronic Theses and Dissertations
Three alternative theories to general relativity will be studied. The aim is to test these theories by applying them to astronomical objects or the cosmological background. The first one is unimodular relativity. The cosmological perturbation theory of this model is studied and the predictions on temperature fluctuations of the cmb are found. The second one is drgt massive gravity. In this theory a charged black hole solution is found and compared to those in gr, folloby constraints on the parameter space. The third one is a general massive gravity theory which shares the same background equation with the massless case …