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FUTURE PLANS AT BNL: RHIC-II AND eRHIC.
The development of future facilities relevant to the study of deep inelastic scattering at BNL is described.
Date:
April 16, 2007
Creator:
ARONSON,S.
Object Type:
Article
System:
The UNT Digital Library
Demonstration of Key Elements of a Dual Phase Argon Detection System Suitable for Measurement of Coherent Neutrino-Nucleus Scattering
This feasibility study sought to demonstrate several necessary steps in a research program whose ultimate goal is to detect coherent scattering of reactor antineutrinos in dual-phase noble liquid detectors. By constructing and operating a Argon gas-phase drift and scintillation test-bed, the study confirmed important expectations about sensitivity of these detectors, and thereby met the goals set forth in our original proposal. This work has resulted in a successful Lab-Wide LDRD for design and deployment of a coherent scatter detector at a nuclear reactor, and strong interest by DOE Office of Science. In recent years, researchers at LLNL and elsewhere have converged on a design approach for a new generation of very low noise, low background particle detectors known as two-phase noble liquid/noble gas ionization detectors. This versatile class of detector can be used to detect coherent neutrino scattering-an as yet unmeasured prediction of the Standard Model of particle physics. Using the dual phase technology, our group would be the first to verify the existence of this process. Its (non)detection would (refute)validate central tenets of the Standard Model. The existence of this process is also important in astrophysics, where coherent neutrino scattering is assumed to play an important role in energy …
Date:
April 16, 2007
Creator:
Adam, B.; Celeste, W.; Christian, H.; Wolfgang, S. & Norman, M.
Object Type:
Report
System:
The UNT Digital Library
Enhancing the Quality of Metadata: Modular Approach to Digital Resource Lifecycle Management
This Tech Talk presentation discusses digital resource management. Templates, validation, controlled vocabularies, analysis tools, graphical reports, and more are explained in this presentation.
Date:
March 16, 2007
Creator:
Alemneh, Daniel Gelaw & Phillips, Mark Edward
Object Type:
Presentation
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 25, No. 33, Ed. 1 Thursday, August 16, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
August 16, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Relativistic Dark Matter at the Galactic Center
In a large region of the supersymmetry parameter space, the annihilation cross section for neutralino dark matter is strongly dependent on the relative velocity of the incoming particles. We explore the consequences of this velocity dependence in the context of indirect detection of dark matter from the galactic center. We find that the increase in the annihilation cross section at high velocities leads to a flattening of the halo density profile near the galactic center and an enhancement of the annihilation signal.
Date:
November 16, 2007
Creator:
Amin, Mustafa A.; /Stanford U., Phys. Dept. /KIPAC, Menlo Park & Wizansky, Tommer
Object Type:
Article
System:
The UNT Digital Library
The Cost of Iraq, Afghanistan, and Other Global War on Terror Operations Since 9/11
This report provides information about the Cost of Iraq, Afghanistan, and Other Global War on Terror Operations Since 9/11.
Date:
July 16, 2007
Creator:
Amy, Belsaco
Object Type:
Report
System:
The UNT Digital Library
Ensemble: 2007-03-16 – New Works for Percussion
New works for percussion solo and ensembles performed at UNT College of Music Concert Hall.
Date:
March 16, 2007
Creator:
Anderson, Jon; Charles, Ben; Coronado, Andrew; Cortes, Mike; Dolce, Joe; Hawkins, Danny et al.
Object Type:
Sound
System:
The UNT Digital Library
The United Kingdom: Issues for the United States
This report assesses the current state of U.S.-UK relations. It examines the pressures confronting London as it attempts to balance its interests between the United States and the EU, and the prospects for the U.S.-UK partnership, especially in the unfolding Brown era.
Date:
July 16, 2007
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
Application of Bomb Radiocarbon Chronologies to Shortfin Mako (Isurus oxyrinchus)
There is an ongoing disagreement regarding the aging of the shortfin mako due to a difference of interpretation in the periodic deposition of vertebral growth band pairs, especially for the larger size classes. Using analysis of length-month information, tagging data, and length-frequency analysis, concluded that two band pairs were formed in the vertebral centrum every year (biannual band-pair interpretation). Cailliet et al. (1983), however, presented growth parameters based on the common assumption that one band pair forms annually (annual band-pair interpretation). Therefore, growth rates obtained by Pratt & Casey (1983) were twice that of Cailliet et al. (1983) and could lead to age discrepancies of about 15 years for maximum estimated ages on the order of 30 from the annual band-pair interpretation. Serious consequences in the population dynamics could occur for this species if inputs are based on an invalid age interpretation. The latest Fishery Management Plan (FMP) for Highly Migratory Species (HMS), for example, adopted the biannual band pair deposition hypothesis because it apparently fit the observed growth patterns best (Pacific Fishery Management Council 2003). However, the ongoing uncertainty about the aging of the shortfin mako was acknowledged and it was recommended that an endeavor to resolve this issue …
Date:
July 16, 2007
Creator:
Ardizzone, D; Cailliet, G M; Natanson, L J; Andrews, A H; Kerr, L A & Brown, T A
Object Type:
Article
System:
The UNT Digital Library
LCLS Ultrafast Science Instruments:Conceptual Design Report
The Stanford Linear Accelerator Center (SLAC), along with Argonne National Laboratory (ANL), Lawrence Livermore National Laboratory (LLNL), and the University of California at Los Angeles (UCLA), is constructing a Free-Electron Laser (FEL) facility, which will operate in the wavelength range 1.5 nm - 0.15 nm. This FEL, the Linac Coherent Light Source (LCLS), utilizes the SLAC linac and will produce sub-picosecond pulses of short wavelength X-rays with very high peak brightness and almost complete transverse coherence. The final one-third of the SLAC linac will be used as the source of electrons for the LCLS. The high energy electrons will be transported across the SLAC Research Yard, into a tunnel which will house a long undulator. In passing through the undulator, the electrons will be bunched by the force of their own synchrotron radiation and produce an intense, monochromatic, spatially coherent beam of X-rays. By varying the electron energy, the FEL X-ray wavelength will be tunable from 1.5 nm to 0.15 nm. The LCLS will include two experimental halls as well as X-ray optics and infrastructure necessary to create a facility that can be developed for research in a variety of disciplines such as atomic physics, materials science, plasma physics and …
Date:
October 16, 2007
Creator:
Arthur, J.; Boutet, S.; Castagna, J-C.; Chapman, H.; Feng, Y.; Foyt, W. et al.
Object Type:
Report
System:
The UNT Digital Library
Final report on the project entitled: Highly Preheated Combustion Air System with/without Oxygen Enrichment for Metal Processing Furnaces
This work develops and demonstrates a laboratory-scale high temperature natural gas furnace that can operate with/without oxygen enrichment to significantly improve energy efficiency and reduce emissions. The laboratory-scale is 5ft in diameter & 8ft tall. This furnace was constructed and tested. This report demonstrates the efficiency and pollutant prevention capabilities of this test furnace. The project also developed optical detection technology to control the furnace output.
Date:
February 16, 2007
Creator:
Atreya, Arvind
Object Type:
Report
System:
The UNT Digital Library
Design and Initial Tests of the Tracker-Converter ofthe Gamma-ray Large Area Space Telescope
The Tracker subsystem of the Large Area Telescope (LAT) science instrument of the Gamma-ray Large Area Space Telescope (GLAST) mission has been completed and tested. It is the central detector subsystem of the LAT and serves both to convert an incident gamma-ray into an electron-positron pair and to track the pair in order to measure the gamma-ray direction. It also provides the principal trigger for the LAT. The Tracker uses silicon strip detectors, read out by custom electronics, to detect charged particles. The detectors and electronics are packaged, along with tungsten converter foils, in 16 modular, high-precision carbon-composite structures. It is the largest silicon-strip detector system ever built for launch into space, and its aggressive design emphasizes very low power consumption, passive cooling, low noise, high efficiency, minimal dead area, and a structure that is highly transparent to charged particles. The test program has demonstrated that the system meets or surpasses all of its performance specifications as well as environmental requirements. It is now installed in the completed LAT, which is being prepared for launch in early 2008.
Date:
April 16, 2007
Creator:
Atwood, W.B.; Bagagli, R.; Baldini, L.; Bellazzini, R.; Barbiellini, G.; Belli, F. et al.
Object Type:
Article
System:
The UNT Digital Library
Amplitude Analysis of the B+ to phi K*+(892) Decay
We perform an amplitude analysis of B{sup {+-}} {yields} {var_phi}(1020)K*(892){sup {+-}} decay with a sample of about 384 million B{bar B} pairs recorded with the BABAR detector. Overall, twelve parameters are measured, including the fractions of longitudinal f{sub L} and parity-odd transverse f{sub {perpendicular}} amplitudes, branching fraction, strong phases, and six parameters sensitive to CP-violation. We use the dependence on the K{pi} invariant mass of the interference between the J{sup P} = 1{sup -} and 0{sup +} K{pi} components to resolve the discrete ambiguity in the determination of the strong and weak phases. Our measurements of f{sub L} = 0.49 {+-} 0.05 {+-} 0.03, f{sub {perpendicular}} = 0.21 {+-} 0.05 {+-} 0.02, and the strong phases point to the presence of a substantial helicity-plus amplitude from a presently unknown source.
Date:
May 16, 2007
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Search for the rare decay B to pi l+ l-
The authors have performed a search for the flavor-changing neutral-current decays B {yields} {pi}{ell}{sup +}{ell}{sup -}, where {ell}{sup +}{ell}{sup -} is either e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -}, using a sample of 230 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector. They observe no evidence of a signal and measure the upper limit on the isospin-averaged branching fraction to be {Beta}(B {yields} {pi}{ell}{sup +}{ell}{sup -}) < 9.1 x 10{sup -8} at 90% confidence level. They also search for the lepton-flavor-violating decays B {yields} {pi}e{sup {+-}} {mu}{sup {-+}} and measure an upper limit on the isospin-averaged branching fraction of {Beta}(B {yields} {pi}e{sup {+-}} {mu}{sup {-+}}) < 9.2 x 10{sup -8} at 90% confidence level.
Date:
March 16, 2007
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
A Study of B0 to rho+rho- Decays and Constraints on theCKM Angle alpha
The authors present results from an analysis of B{sup 0} {yields} {rho}{sup +}{rho}{sup -} decays using (383.6 {+-} 4.2) x 10{sup 6} B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The measurements of the B{sup 0} {yields} {rho}{sup +}{rho}{sup -} branching fraction, longitudinal polarization fraction f{sub L}, and the CP-violating parameters S{sub long} and C{sub long} are: {Beta}(B{sup 0} {yields} {rho}{sup +}{rho}{sup -}) = (25.5 {+-} 2.1(stat){sub -3.9}{sup +3.6}(syst)) x 10{sup -6}, f{sub L} = 0.992 {+-} 0.024(stat){sub -0.013}{sup +0.026}(syst), S{sub long} = -0.17 {+-} 0.20(stat){sub -0.06}{sup +0.05}(syst), C{sub long} = 0.01 {+-} 0.15(stat) {+-} 0.06(syst). The authors determine the unitarity triangle angle {alpha}, using an isospin analysis of B {yields} {rho}{rho} decays. One of the two solutions, {alpha} = [73.1, 117.0]{sup o} at 68% CL is compatible with standard model-based fits of existing data. Constraints on the unitarity triangle are also evaluated using an SU(3) symmetry based approach.
Date:
May 16, 2007
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Branching Fraction and Charge Asymmetry Measurements inB to J/psi pi pi Decays
The authors study the decays B{sup 0} {yields} J/{psi} {pi}{sup +}{pi}{sup -} and B{sup +} {yields} J/{psi} {pi}{sup +}{pi}{sup 0}, including intermediate resonances, using a sample of 382 million B{bar B} pairs recorded by the BABAR detector at the PEP-II e{sup +}e{sup -} B factory. They measure the branching fractions {Beta}(B{sup 0} {yields} J/{psi} {rho}{sup 0}) = (2.7 {+-} 0.3 {+-} 0.17) x 10{sup -5} and {Beta}(B{sup +} {yields} J/{psi} {rho}{sup +}) = (5.0 {+-} 0.7 {+-} 0.31) x 10{sup -5}. The authors also set the following upper limits at the 90% confidence level: {Beta}(B{sup 0} {yields} J/{psi} {pi}{sup +}{pi}{sup -} non-resonant) < 1.2 x 10{sup -5}, {Beta}(B{sup 0} {yields} J/{psi} f{sub 2}) < 4.6 x 10{sup -6}, and {Beta}(B{sup +} {yields} J/{psi} {pi}{sup +}{pi}{sup 0} non-resonant) < 4.4 x 10{sup -6}. They measure the charge asymmetry in charged B decays to J/{psi} {rho} to be -0.11 {+-} 0.12 {+-} 0.08.
Date:
April 16, 2007
Creator:
Aubert, B.; Bona, M.; Boutigny, D.; Karyotakis, Y.; Lees, J. P.; Poireau, V. et al.
Object Type:
Article
System:
The UNT Digital Library
Selective Adsorption of Sodium Aluminum Fluoride Salts from Molten Aluminum
Aluminum is produced in electrolytic reduction cells where alumina feedstock is dissolved in molten cryolite (sodium aluminum fluoride) along with aluminum and calcium fluorides. The dissolved alumina is then reduced by electrolysis and the molten aluminum separates to the bottom of the cell. The reduction cell is periodically tapped to remove the molten aluminum. During the tapping process, some of the molten electrolyte (commonly referred as “bath” in the aluminum industry) is carried over with the molten aluminum and into the transfer crucible. The carryover of molten bath into the holding furnace can create significant operational problems in aluminum cast houses. Bath carryover can result in several problems. The most troublesome problem is sodium and calcium pickup in magnesium-bearing alloys. Magnesium alloying additions can result in Mg-Na and Mg-Ca exchange reactions with the molten bath, which results in the undesirable pickup of elemental sodium and calcium. This final report presents the findings of a project to evaluate removal of molten bath using a new and novel micro-porous filter media. The theory of selective adsorption or removal is based on interfacial surface energy differences of molten aluminum and bath on the micro-porous filter structure. This report describes the theory of the …
Date:
August 16, 2007
Creator:
Aubrey, Leonard S.; Boyle, Christine A.; Williams, Eddie M.; DeYoung, David H.; Smith, Dawid D. & Chi, Feng
Object Type:
Report
System:
The UNT Digital Library
[Amanda Johnson and Danielle Herron on field]
Photograph of Amanda Johnson and Danielle Herron on the field during a game between the Mean Green and Grambling State. Johnson is chasing after the ball and Herron is beside her. Their opponents and teammates are further down the field.
Date:
September 16, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Amanda Johnson following the soccer ball]
Photograph of Amanda Johnson moving with the soccer ball during a game between the Mean Green and Grambling State. The stands with audience members is visible past her.
Date:
September 16, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Amanda Johnson jumping for the ball]
Photograph of Amanda Johnson jumping up to knee the ball during a game between the Mean Green and Grambling State. An opponent is standing beside her and others are in the distance.
Date:
September 16, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Amanda Johnson preparing to kick the soccer ball]
Photograph of Amanda Johnson moving to kick the soccer ball during a game between the Mean Green and Grambling State. The stands with audience members is visible past her.
Date:
September 16, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Amanda Mitchell kicking the ball]
Photograph of Amanda Mitchell in the process of kicking the soccer ball during a game between the Mean Green and Grambling State. An opponent is right in front of her and a teammate is to the side. Referees and another opponent are on the field and attendees are visible in the stands on the opposite side of the field.
Date:
September 16, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Brittany Cleveland and Kendall Juett on field]
Photograph of Brittany Cleveland and Kendall Juett on the field during a game between the Mean Green and Grambling State. Cleveland is jumping up and the attendees in stands are visible on the other side of the field.
Date:
September 16, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library
[Brittany Cleveland kicking the ball]
Photograph of Brittany Cleveland preparing to kick the soccer ball during a game between the Mean Green and Grambling State. One of her teammates and a goalie are visible ahead of her.
Date:
September 16, 2007
Creator:
Baugh, Brian
Object Type:
Photograph
System:
The UNT Digital Library