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Search for Doubly-charged Higgs Boson Production in the Decay H++ H-- ---> mu+ mu+ mu- mu- with 1.1 fb**(-1) at D0 Detector

Description: This work presents a search for the pair production of doubly-charged Higgs bosons in the process p{bar p} {yields} H{sup ++}H{sup --} {yields} {mu}{sup +}{mu}{sup +}{mu}{sup -}{mu}{sup -} using the data corresponding to an integrated luminosity of about 1.1 fb{sup -1}. This is the complete dataset of RunIIa taken from April 19, 2002 to February 22, 2006 by the D0 experiment at the Fermilab Tevatron Collider. In the absence of significant excess above standard model background, 95% confidence l… more
Date: June 1, 2007
Creator: Kim, Tae Jeong & U., /Korea
Partner: UNT Libraries Government Documents Department
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Symphony No. 1

Description: Symphony No. 1 is a three-movement work for orchestra. The movements have the following tempo indications: (I) Allegro ma non troppo, (II) Lento, and (III) Allegro giocoso. The composition is scored for 3 flutes (3rd flute interchangeable with piccolo), 2 oboes, 2 clarinets in B-flat, bass clarinet in B-flat, 2 bassoons, contra-bassoon, 4 horns in F, 3 trumpets in B-flat, 2 tenor trombones, bass trombone, tuba, percussion (timpani, snare drum, and triangle), and the usual complement of strings.
Date: June 1967
Creator: Watson, Walter, 1933-2014.
Partner: UNT Libraries
open access

CHEMISTRY OF +1 IODINE IN ALKALINE SOLUTION

Description: The iodine species formed either by adding hypochlorite to a basic iodide solution or by adding triiodide to sodium hydroxide, was identified as hypoiodite ion. The absorption spectrum of IO{sup -} was investigated in the wavelength range from 450 m{micro} to 280 m{micro}. The kinetics of the reaction I{sup -} + ClO{sup -} = IO{sup -} + Cl{sup -} was studied spectrophotometrically in alkaline solution. The forward rate law was found to be d(IO{sup -})/dt = k(I{sup -})(ClO{sup -})/OH{sup -}. At … more
Date: June 2, 1958
Creator: Chia, Yuan-tsan.
Partner: UNT Libraries Government Documents Department
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Symphony Number 1. : First Movement

Description: This thesis consists of the first movement and discussion of Symphony Number I, an original composition by Gerald Ray Haney.
Date: June 1948
Creator: Haney, Gerald Ray
Partner: UNT Libraries
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
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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

10 microsecond time resolution studies of Cygnus X-1

Description: Time variability analyses have been applied to data composed of event times of X-rays emitted from the binary system Cygnus X-1 to search for unique black hole signatures. The X-ray data analyzed was collected at ten microsecond time resolution or better from two instruments, the High Energy Astrophysical Observatory (HEAO) A-1 detector and the Rossi X-ray Timing Explorer (XTE) Proportional Counter Array (PCA). HEAO A-1 and RXTE/PCA collected data from 1977--79 and from 1996 on with energy sens… more
Date: June 1, 1997
Creator: Wen, H.C.
Partner: UNT Libraries Government Documents Department
open access

The Waste Package Project. Final report, July 1, 1995--February 27, 1996: Volume 1, The structural performance of the shell and fuel rods of a high level nuclear waste container

Description: This dissertation proposal covers research work that started in the spring of 1992. The aim of the research has been to study the structural performance and stability of proposed nuclear waste containers and the enclosed fuel rods to be used in the long term storage of High Level Nuclear Waste (HLNW). This research is in two phases, computational and experimental. The computational phase deals with the linear and nonlinear Finite Element Analysis of the different containers due to various loadi… more
Date: June 1, 1996
Creator: Ladkany, S.G. & Rajagopalan, R.
Partner: UNT Libraries Government Documents Department
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A Study of Fundamental Reaction Pathways for Transition Metal Alkyl Complexes: [Parts 1 and 2]

Description: I. This study reports the rapid reaction under mild conditions of internal or terminal alkynes with methyl (acetyl~ acetonato) (triphenylphosphine) nickel (1) in either aromatic or ether solvents. In all cases vinylnickel products 2 are formed by insertion of the alkyne into the nickel=methyl bond. These complexes may be converted into a variety of organic products (e.g. alkenes, esters, vinyl halides) by treatment with appropriate reagents. Unsymmetrical alkynes give selectively the one regioi… more
Date: June 1, 1980
Creator: Huggins, John Mitchell
Partner: UNT Libraries Government Documents Department
open access

Jet Production in the Central Rapidity Region in 1.8 TeV Proton and Antiproton Collisions

Description: In this thesis we study the jet production cross section in the central rapidity region in {bar p}p collisions at a center of mass energy of 1.8 TeV. The pseudo-rapidity {eta} is defined as {eta} {triple_bond} -ln(tan({theta}/2)), where {theta} is the angle between the directions of the jet momentum and the proton beam. We will call the region -0.7 < {eta} < 0.7 the 'central rapidity' region by definition. The goal of this thesis is to determine two kinds of differential cross sections fo… more
Date: June 1, 1989
Creator: Tsai, Yeong-Dong
Partner: UNT Libraries Government Documents Department
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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

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

Search for t-Channel Single Top Quark Production in p anti-p Collisions at 1.96 TeV

Description: I have performed a search for t-channel single top quark production in p{bar p} collisions at 1.96 TeV on a 366 pb{sup -1} dataset collected with the D0 detector from 2002-2005. The analysis is restricted to the leptonic decay of the W boson from the top quark to an electron or muon, tq{bar b} {yields} lv{sub l}b q{bar b} (l = e,{mu}). A powerful b-quark tagging algorithm derived from neural networks is used to identify b jets and significantly reduce background. I further use neural networks t… more
Date: June 1, 2006
Creator: Perea, Philip Michael & /UC, Riverside
Partner: UNT Libraries Government Documents Department
open access

Measurement of the Three-jet Mass Cross Section in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV

Description: This thesis describes the measurement of the inclusive three-jet cross section in proton-antiproton collisions at √s = 1.96 TeV measured at the D0 experiment at the Fermilab Tevatron Collider in the Fermi National Accelerator Laboratory, Batavia, Illinois, USA. The cross section as a function of three-jet invariant mass is provided in three regions of the third jet transverse momentum and three regions of jet rapidities. It utilizes a data sample collected in the so called Run IIa data taking p… more
Date: June 1, 2010
Creator: Hubacek, Zdenek
Partner: UNT Libraries Government Documents Department
open access

Spin correlation in t{anti t} production from p{anti p} collisions at {radical}s = 1.8 TeV

Description: The Standard Model predicts that the lifetime of the top quark is shorter than the typical time scale at which hadronization process occurs, and the spin information at its production is preserved. Spin correlation of the t{anti t} system from p{anti p} collisions at the Tevatron is analyzed using 6 events in the dilepton channels collected using the D0 detector. Spin correlation factor of {kappa} > {minus} 0.25 at 68% CL is obtained from the data.
Date: June 15, 2000
Creator: Choi, Suyong
Partner: UNT Libraries Government Documents Department
open access

Resonance searches with the $t\overline{t}$ Invariant Mass Distribution measured with the D\O\, Experiment at $\sqrt{s}=1.96\,\textrm{TeV}

Description: Understanding the universe, its birth and its future is one of the biggest motivations in physics. In order to understand the cosmos, the fundamental particles forming the universe, the components our matter is built of need to be known and understood. Over time physicists have built a theory which describes the physics of the known fundamental particles very well: the Standard Model (SM) of particle physics. The SM describes the particles, their interactions and phenomena with high precision. … more
Date: June 1, 2010
Creator: Schliephake, Thorsten Dirk & U., /Wuppertal
Partner: UNT Libraries Government Documents Department
open access

A measurement of t{anti t} production cross section in p{anti p} collisions at {radical}s = 1.8 TeV using neural networks

Description: The authors present the results of a new measurement of the t{anti t} production cross section using e{mu} channel in p{anti p} collisions at {radical}s = 1.8 TeV. This study corresponds to an integrated luminosity of 108.3 {+-} 5.7 pb{sup {minus}1} acquired by the D0 detector during the Fermilab Tevatron Collider Run 1 (1992--1996). By using neural network techniques instead of the conventional analysis methods, the authors show that the signal acceptance can be increased by 10% (for m{sub t} … more
Date: June 16, 2000
Creator: Singh, Harpreet
Partner: UNT Libraries Government Documents Department
open access

Study of the heavy flavour fractions in z+jets events from proton-antiproton collisions at energy = 1.96 TeV with the CDF II detector at the Tevatron collider

Description: The Standard Model of field and particles is the theory that provides the best description of the known phenomenology of the particle physics up to now. Data collected in the last years, mainly by the experiments at the big particle accelerators (SPS, LEP, TEVATRON, HERA, SLAC), allowed to test the agreement between measurements and theoretical calculations with a precision of 10{sup -3} {divided_by} 10{sup -4}. The Standard Model is a Quantum Field Theory based on the gauge symmetry group SU(3… more
Date: June 1, 2008
Creator: Mastrandrea, Paolo & U., /Siena
Partner: UNT Libraries Government Documents Department
open access

A search for neutral Higgs bosons at high tan beta in multi-jet events from p anti-p collisions at s**(1/2) = 1960-GeV

Description: The Higgs mechanism preserves the gauge symmetries of the Standard Model while giving masses to the W, Z bosons. Supersymmetry, which protects the Higgs boson mass scale from quantum corrections, predicts at least 5 Higgs bosons, none of which has been directly observed. This thesis presents a search for neutral Higgs bosons, produced in association with bottom quarks. The production rate is greatly enhanced at large values of the Supersymmetric parameter tan {beta}. High-energy p{bar p} collis… more
Date: June 1, 2004
Creator: Haas, Andrew C. & /Washington U., Seattle
Partner: UNT Libraries Government Documents Department
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