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Still life in black and white: An intertextual interpretation of William Grant Still's "symphonic trilogy."

Description: William Grant Still's musical achievements are legion. Because he was the first African American to break the color line in America's concert halls, Still earned the sobriquet "Dean of Negro Composers." Paradoxically, Still's reception suffers from this list of "firsts." The unintended consequence of cataloging his achievements venerates his position as an iconoclast while detracting critical attention from his music. Conversely, if we ignore the social context in which Still produced his m… more
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Date: August 2005
Creator: Lamb, Earnest
Partner: UNT Libraries
open access

Measurement of z0 gamma production in ppbar collisions at s**(1/2) = 1.96 TeV

Description: The cross-section of p{bar p} {yields} Z{sup 0}{gamma} + X production at {radical}s = 1.96 TeV using the CDF II detector at the Fermilab Tevatron is measured using 202 pb{sup -1} of data from March 2002 to September 2003, collected with high P{sub T} lepton triggers. The number of events observed and their kinematic distributions are compared to the NLO Standard Model prediction in both the Z{sup 0} {yields} e{sup +}e{sup -} and Z{sup 0} {yields} {mu}{sup +}{mu}{sup -} channels. For a minimum l… more
Date: March 1, 2005
Creator: Hayward, Helen Sarah
Partner: UNT Libraries Government Documents Department
open access

Search for Charged Higgs in ttbar Decay Products from Proton-Antiproton Collisions at s**(1/2) = 1.96 TeV

Description: This dissertation reports the results of a search for charged Higgs bosons in the decays of t{bar t} pairs produced in p{bar p} collisions at a center-of-mass energy of 1.96 TeV. The search is performed on a data sample recorded by the upgraded Collider Detector at Fermilab and corresponding to an integrated luminosity of 193 pb{sup -1}. The search is based on the relative rates of events in the different t{bar t} decay channels. Results are obtained in the context of different models. In the c… more
Date: October 1, 2005
Creator: Eusebi, Ricardo
Partner: UNT Libraries Government Documents Department
open access

A Measurement of Z Boson Production and Rapidity Distribution in p - anti-p Collisions at s**(1/2) = 1.96-TeV

Description: High-precision measurements are made of Z boson production in proton-antiproton collisions at {radical}s = 1.96 TeV recorded by the Collider Detector at Fermilab, using the electron decay channel. The cross-section times branching ratio is measured to be {sigma}{sub Z} {center_dot} Br(Z {yields} e{sup +}e{sup -}) = (255.7 {+-} 2.4{sub stat} {+-} 5.2{sub sys} {+-} 15.2{sub lum})pb in a dataset of 194 pb{sup -1} collected between March 2002 and June 2003. This agrees well with theoretical predict… more
Date: January 1, 2005
Creator: Robson, Aidan & U., /Oxford
Partner: UNT Libraries Government Documents Department
open access

Measurement of the t anti-t production cross section in p anti-p collisions at s**(1/2) = 1.96-TeV

Description: We present the measurement of the t{bar t} cross section in the lepton plus jets channel with {ge} 1 and {ge} 2 secondary vertex tags. We use the scalar sum of transverse energies of the event (H{sub T}) to discriminate t{bar t} from the other backgrounds. We also use the transverse mass of the leptonic W-boson (M{sub T}{sup W}) to further reduce the Non-W backgrounds. We use a combination of data and Monte Carlo to estimate the backgrounds from electroweak processes, single top, fake leptons, … more
Date: August 1, 2005
Creator: Rappoccio, Salvatore Rocco
Partner: UNT Libraries Government Documents Department
open access

Measurement of top anti-top cross section in proton - anti-proton collider at s**(1/2) = 1.96-TeV

Description: Discovery of the top quark in 1995 at the Fermilab Tevatron collider concluded a long search following the 1977 discovery of bottom (b) quark [1] and represents another triumph of the Standard Model (SM) of elementary particles. Top quark is one of the fundamental fermions in the Standard Model of electroweak interactions and is the weak-isospin partner of the bottom quark. A precise measurement of top pair production cross-section would be a test of Quantum Chromodynamics (QCD) prediction. Pre… more
Date: April 1, 2005
Creator: Mal, Prolay Kumar & Inst., /Tata
Partner: UNT Libraries Government Documents Department
open access

Measurements of the top - anti-top Production Cross Section at s**(1/2) = 1.96-TeV and Top Mass in the Dielectron Channel

Description: The first measurement of the top-antitop production cross section in proton-antiproton collisions at {radical}s = 1.96 TeV using 243 pb{sup -1} of data collected with the D0 detector at Fermilab is presented. In this analysis, only the dielectron final state is considered. Five events are observed, and 0.93 background events are expected. The measured cross section, after accounting for the expected branching ratio to the dielectron channel, is {sigma}{sub t{bar t}} = 14.9{sub -7.0}{sup +9.4}(s… more
Date: May 1, 2005
Creator: Kozminski, Joseph Francis
Partner: UNT Libraries Government Documents Department
open access

A Search for New Physics with High Mass Tau Pairs in proton anti-proton collisions at s**(1/2) = 1.96-TeV at CDF

Description: We present the results of a search for new particles decaying to tau pairs using the data corresponding to an integrated luminosity of 195 pb{sup -1} collected from March 2002 to September 2003 with the CDF detector at the Tevatron. Hypothetical particles, such as Z' and MSSM Higgs bosons can potentially produce the tau pair final state. We discuss the method of tau identification, and show the signal acceptance versus new particle mass. The low-mass region, dominated by Z {yields} {tau}{tau}, … more
Date: April 1, 2005
Creator: Wan, Zong-ru
Partner: UNT Libraries Government Documents Department
open access

First observation of dijet events with an antiproton tag at s**(1/2) = 1.96 TeV using the D0 Forward Proton Detector

Description: The Forward Proton Detector (FPD) is a new sub-system of the D0 detector, a 5000 ton particle physics detector located at the Fermilab Tevatron proton-antiproton collider. The FPD was implemented for the Tevatron Run II and gives access to a wide range of diffractive scattering processes, where one or both of the beam particles remain intact. The analysis described in this thesis makes use of the dipole spectrometer of the FPD to tag outgoing antiprotons in events that have a dijet signature in… more
Date: July 1, 2005
Creator: Strang, Michael Allen
Partner: UNT Libraries Government Documents Department
open access

Search for electroweak single top quark production with cdf in proton - anti-proton collisions at s**(1/2) = 1.96-TeV

Description: In this thesis two searches for electroweak single top quark production with the CDF experiment have been presented, a cutbased search and an iterated discriminant analysis. Both searches find no significant evidence for electroweak single top production using a data set corresponding to an integrated luminosity of 162 pb{sup -1} collected with CDF. Therefore limits on s- and t-channel single top production are determined using a likelihood technique. For the cutbased search a likelihood functi… more
Date: June 1, 2005
Creator: Walter, Thorsten & /Karlsruhe U., EKP
Partner: UNT Libraries Government Documents Department
open access

The inclusive jet cross-section in proton anti-proton collisions at s**(1/2) = 1.96-TeV using the MidPoint jet algorithm

Description: The following work presents a preliminary measurement of the inclusive jet cross section for jet transverse momenta from 61 to 620 GeV in the rapidity range 0.1 < |Y| < 0.7. The result is based on 218 pb{sup -1} of data collected by the CDF detector at the Fermi National Accelerator Lab. The data are consistent with NLO pQCD predictions based on the CTEQ6.1 parton distribution functions.
Date: April 1, 2005
Creator: Flanagan, Gene U.
Partner: UNT Libraries Government Documents Department
open access

Search for a new charged heavy vector boson decaying to an electron-neutrino pair in p anti-p collisions at s**(1/2) = 1.96 TeV

Description: We present results on a search for a heavy charged vector boson, W', decaying to an electron-neutrino pair in p{bar p} collisions at {radical}s = 1.96 TeV using a data sample corresponding to an integrated luminosity of 205 pb{sup -1}. We found no evidence of this decay channel, and set 95% confidence level limits on the production cross section times branching fraction assuming the light neutrino. We also set the limit on the W' boson mass at M{sub W'} > 788 GeV/c{sup 2}, assuming the stand… more
Date: June 1, 2005
Creator: Kim, Jieun & U., /Kyungpook Natl.
Partner: UNT Libraries Government Documents Department
open access

Measurement of W + gamma Production in the W to Muon Decay Channel in Proton - Anti-proton Collisions at s**(1/2) = 1.96-TeV

Description: The production cross section and the kinematic properties of the decay products of W{gamma} in the W {yields} {mu}{nu} decay channel from p{bar p} collisions at {radical}s = 1.96 TeV are presented. The measurement use the high p{sub T} muon data from the upgraded Collider Detector at Fermilab (CDF). The data were collected between March 2002 and September 2003. The total integrated luminosities are 192 pb{sup -1} with the muon detector which covers the pseudorapidity region of |{eta}| {le} 0.6 … more
Date: March 1, 2005
Creator: Tanimoto, Naho & U., /Okayama
Partner: UNT Libraries Government Documents Department
open access

Study of Charged Particle Species Produced in Association with B0, B-, and Bs Mesons in proton - anti-proton collisions at s**(1/2) = 1.96-TeV

Description: The authors study the yields of charged kaons, charged pions, and protons produced in association with B mesons produced in proton-antiproton collisions at center of mass energy 1960 GeV using 355 pb{sup -1} of data collected with the CDF detector at the Fermilab Tevatron. This is the first reported measurements of these yields at a hadron collider. The B mesons are reconstructed using their semileptonic decays: B{sup 0} {yields} {ell}{sup +}D{sup -}X, D{sup -} {yields} K{sup +}{pi}{sup -}{pi}{… more
Date: December 1, 2005
Creator: Usynin, Denys
Partner: UNT Libraries Government Documents Department
open access

Measurement of the w and z cross sections in the electron channel for p anti-p collisions at s**(1/2) = 1.96 TeV and extraction of the w total width from the ratio

Description: This dissertation presents measurements of the inclusive production cross sections for W and Z gauge bosons decaying through the electron channel with p{bar p} collisions at a center-of-mass energy of 1.96 TeV. The ratio of these cross sections is then used to extract the W total width. The Standard Model (SM) of electroweak and strong interactions is a collection of theories which together encompass what is currently known about the elementary particles that make up matter and the forces throu… more
Date: January 1, 2005
Creator: Gardner, John Michael
Partner: UNT Libraries Government Documents Department
open access

Measurement of the top - anti-top Production Cross Section at s**(/1/2) = 1.96-TeV in the e + jets Final State of proton anti-proton Collisions at the Tevatron

Description: We discuss the measurement of the cross section for t{bar t} production in p{bar p} collisions at {radical}s = 1.96 TeV in e+jets final states observed at the D0 experiment at the Fermilab Tevatron. Our result is based on data collected from the June 2002 to September 2003 period of Run II of the p{bar p} Collider. In the Standard Model, the top quark is expected to decay mainly into a W boson and a b quark. The W boson can decay subsequently into a lepton and its neutrino or a q{bar q} quark-a… more
Date: February 1, 2005
Creator: Cho, DooKee
Partner: UNT Libraries Government Documents Department
open access

Large Pt processes in ppbar collisions at 2 TeV: measurement of ttbar production cross section in ppbar collisions at s**(1/2) = 1.96 TeV in the dielectron final states at the D0 experiment

Description: The measurement of the top-antitop pair production cross section in p{bar p} collisions at {radical}s = 1.96 TeV in the dielectron decay channel using 384 pb{sup -1} of D0 data yields a t{bar t} production cross-section of {sigma}{sub t{bar t}} = 7.9{sub -3.8}{sup +5.2}(stat){sub -1.0}{sup +1.3}(syst) {+-} 0.5 (lumi) pb. This measurement [98] is based on 5 observed events with a prediction of 1.04 background events. The cross-section corresponds to the top mass of 175 GeV, and is in good agreem… more
Date: October 1, 2005
Creator: Kumar, Ashish & U., /Delhi
Partner: UNT Libraries Government Documents Department
open access

Angular correlations in beauty production at the Tevatron at sqrt(s) = 1.96 TeV

Description: Measurements of the b quark production cross section at the Tevatron and at Hera in the final decades of the 20th century have consistently yielded higher values than predicted by Next-to-Leading Order (NLO) QCD. This discrepancy has led to a large efforts by theorists to improve theoretical calculations of the cross sections and simulations of b quark production. As a result, the difference between theory and experiment has been much reduced. New measurements are needed to test the development… more
Date: June 1, 2005
Creator: Wijngaarden, Daniel A. & Nijmegen, /Radboud U.
Partner: UNT Libraries Government Documents Department
open access

Search for Associated Chargino-Neutralino Production in Proton-Antiproton Collisions at 1.96 TeV

Description: The search for a fundamental theory of matter and forces in the universe has ever since attracted the interest of physicists. The large success of the gauge theories in the description of low-energy phenomena nourishes the hope that gauge symmetries are the clue to a unified description of all fundamental processes at high energy scales. Particle collision experiments of the past decades have probed the structure of matter with increasing resolution. The phenomena observed in collision experime… more
Date: August 1, 2005
Creator: Blumenschein, Ulla
Partner: UNT Libraries Government Documents Department
open access

Computational Study and Analysis of Structural Imperfections in 1D and 2D Photonic Crystals

Description: Dielectric reflectors that are periodic in one or two dimensions, also known as 1D and 2D photonic crystals, have been widely studied for many potential applications due to the presence of wavelength-tunable photonic bandgaps. However, the unique optical behavior of photonic crystals is based on theoretical models of perfect analogues. Little is known about the practical effects of dielectric imperfections on their technologically useful optical properties. In order to address this issue, a fin… more
Date: June 1, 2005
Creator: Maskaly, Karlene Rosera
Partner: UNT Libraries Government Documents Department
open access

Measurement of the Ratio of Inclusive Cross Sections Sigma (p anti-p --> Z + b-jet) / Sigma (p anti-p --> Z + jet) at s**(1/2) = 1.96-TeV

Description: Using the data collected with the D0 detector at {radical}s = 1.96 TeV with integrated luminosities of about 180 pb{sup -1}, we have measured the ratio of inclusive cross sections for p{bar p} {yields} Z + b-jet to p{bar p} {yields} Z + jet production. The inclusive Z + b-jet reaction is an important background to searches for the Higgs boson in associated ZH production at the Fermilab Tevatron collider and is sensitive to the b quark content of the proton. This thesis describes our measurement… more
Date: February 1, 2005
Creator: Mutaf, Yildirim D.
Partner: UNT Libraries Government Documents Department

An NMR Study of 2-Ethylbutyllithium/Lithium 2-Ethyl-1-butoxide Mixed Aggregates, Lithium Hydride/Lithium 2-Ethyl-1-butoxide Mixed Aggregates, n-Pentyllithium Aggregates, and n-Pentyllithium/Lithium n-Pentoxide Mixed Aggregates

Description: A 13C and 6Li variable temperature NMR study of 2-ethylbutyllithium/lithium 2-ethyl-1-butoxide mixed aggregates formed from reacting 2-ethyl-1-butanol with 2-ethylbutyllithium in two O/Li ratios of 0.2/1 and 0.8/1. The 0.2/1 sample resulted in two 2-ethylbutyllithium/lithium 2-ethyl-1-butoxide mixed aggregates and seven lithium hydride/lithium 2-ethyl-1-butoxide mixed aggregates. The lithium hydride mixed aggregates were also studied using selective 1H decoupling experiments. The 0.8/1 sampl… more
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Date: December 2005
Creator: Sellers, Nicole
Partner: UNT Libraries
open access

Search for electroweak single top quark production in 1.96-TeV proton-antiproton collisions

Description: This thesis describes the first search for electroweak single top quark production in proton-antiproton collisions at a center of mass energy of 1.96 TeV. The data sample used for this analysis corresponds to 162 pb{sup -1} recorded by the upgraded Collider Detector at Fermilab. The search is performed by doing a classic maximum likelihood fit to the H{sub T} distribution in data. The kinematic variable H{sub T} is the scalar sum of transverse energies of all final state particles in the event.… more
Date: January 1, 2005
Creator: Stelzer, Bernd & U., /Toronto
Partner: UNT Libraries Government Documents Department
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