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Model-independent approaches to QCD and B decays
(Massachusetts Institute of Technology, 2007)
We investigate theoretical expectations for B-meson decay rates in the Standard Model. Strong-interaction effects described by quantum chromodynamics (QCD) make this a challenging endeavor. Exact solutions to QCD are not ...
Probing the epoch of reionization with redshifted 21 cm HI emission
(Massachusetts Institute of Technology, 2007)
Emission and absorption features in the spectrum of the diffuse radio background below 200 MHz due to the 21 cm hyperfine transition line of neutral hydrogen gas in the high redshift intergalactic medium offer a new and ...
Search for pentaquark partners [Theta]⁺⁺, [Sigma]⁰ and N⁰ in H (e,e'K [pi])) X reactions at Jefferson Lab Hall A
(Massachusetts Institute of Technology, 2007)
In 1997, D. Diakonov et al. using a soliton model predicted a SU(3)F flavor antide-cuplet of pentaquarks. The most striking prediction using this symmetry group is a narrow exotic state, E+(1540), which has quark component ...
Measurement of the ratio of branching fractions [Beta](B⁰s --> D⁻s D⁺s) / [Beta] ](B⁰ --> D⁻ D⁺s) with the CDF
(Massachusetts Institute of Technology, 2007)
Black hole singularities in the framework of gauge/string duality
(Massachusetts Institute of Technology, 2007)
In this dissertation black hole singularities are studied using the AdS/CFT correspondence. These singularities show up in the CFT in the behavior of finite-temperature correlation functions. A direct relation is established ...
An upper limit on the abundance of small trans-Neptunian objects from X-ray occultations
(Massachusetts Institute of Technology, 2007)
I describe the detection of 201 highly significant dips in the count rate of Sco X-1 from a search of some 500 ks of archival RXTE PCA data, which could be caused by TNO occultations. I show that most of these dips are ...
Evolution of coronal mass ejections through the heliosphere
(Massachusetts Institute of Technology, 2007)
(cont.) These findings impose a serious problem on particle heating and acceleration within ICMEs. Both case studies and superposed epoch analysis demonstrate that plasma depletion layers (PDLs) and mirror-mode waves occur ...
Investigations of the cascade of Langmuir wave turbulence over HAARP Observatory in Gakona, Alaska
(Massachusetts Institute of Technology, 2007)
This thesis investigates the cascade lines from Langmuir wave turbulence as a result of Parametric Decay Instability (PDI) in the ionosphere. This effect is studied using a high-frequency (HF) heater located at the NSF/DoD ...
Power transfer through strongly coupled resonances
(Massachusetts Institute of Technology, 2007)
Using self-resonant coils in a strongly coupled regime, we experimentally demonstrate efficient non-radiative power transfer over distances of up to eight times the radius of the coils. We use this system to transfer 60W ...
Study of Michel spectrum of tau decay
(Massachusetts Institute of Technology, 2007)
This thesis is the beginning of a larger project to use BaBar to examine weak couplings through leptonic [tau] decay. I will use the ratio of Br... and Br... and the Michel parameters [rho] and [eta]. which describe the ...