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B meson decays to charmless meson pairs containing eta or eta' (open access)

B meson decays to charmless meson pairs containing eta or eta'

The authors present updated measurements of the branching fractions for B{sup 0} meson decays to {eta}K{sup 0}, {eta}{eta}, {eta}{phi}, {eta}{omega}, {eta}{prime}K{sup 0}, {eta}{prime}{eta}{prime}, {eta}{prime}, {phi}, and {eta}{prime}{omega} and branching fractions and CP-violating charge asymmetries for B{sup +} decays to {eta}{pi}{sup +}, {eta}K{sup +}, {eta}{prime}{pi}{sup +}, and {eta}{prime} K{sup +}. The data represent the full dataset of 467 x 10{sup 6} B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at the SLAC National Accelerator Laboratory. Besides large signals for the four charged B decays modes and for B{sup 0} {yields} {eta}{prime}K{sup 0}, they find evidence for three B{sup 0} decays modes at greater than 3.0{sigma} significance. They find {Beta}(B{sup 0} {yields} {eta}K{sup 0}) = (1.15{sub -0.38}{sup +0.43} {+-} 0.09) x 10{sup -6}, {Beta}(B{sup 0} {yields} {eta}{omega}) = (0.94{sub -0.30}{sup +0.35} {+-} 0.09) x 10{sup -6}, and {Beta}(B{sup 0} {yields} {eta}{prime}{omega}) = (1.01{sub -0.38}{sup +0.46} {+-} 0.09) x 10{sup -6}, where the first (second) uncertainty is statistical (systematic). For the B{sup +} {yields} {eta}K{sup +} decay mode, they measure the charge asymmetry {Alpha}{sub ch} (B{sup +} {yields} {eta}K{sup +}) = -0.36 {+-} 0.11 {+-} 0.03.
Date: December 14, 2009
Creator: Aubert, B.
Object Type: Article
System: The UNT Digital Library
Evidence for the eta_b(1S) in the Decay Upsilon(2S)-> gamma eta_b(1S) (open access)

Evidence for the eta_b(1S) in the Decay Upsilon(2S)-> gamma eta_b(1S)

We have performed a search for the {eta}{sub b}(1S) meson in the radiative decay of the {Upsilon}(2S) resonance using a sample of 91.6 million {Upsilon}(2S) events recorded with the BABAR detector at the PEP-II B factory at the SLAC National Accelerator Laboratory. We observe a peak in the photon energy spectrum at E{sub {gamma}} = 610.5{sub -4.3}{sup +4.5}(stat) {+-} 1.8(syst) MeV, corresponding to an {eta}{sub b}(1S) mass of 9392.9{sub -4.8}{sup +4.6}(stat) {+-} 1.9(syst) MeV/c{sup 2}. The branching fraction for the decay {Upsilon}(2S) {yields} {gamma}{eta}{sub b}(1S) is determined to be (4.2{sub -1.0}{sup +1.1}(stat) {+-} 0.9(syst)) x 10{sup -4}. The ratio {Beta}({Upsilon}(2S) {yields} {gamma}{eta}{sub b}(1S))/{Beta}({Upsilon}(3S) {yields} {gamma}{eta}{sub b}(1S)) = 0.89{sub -0.23}{sup +0.25}(stat){sub -0.16}{sup +0.12}(syst) is consistent with the ratio expected for magnetic dipole transitions to the {eta}{sub b}(1S) meson.
Date: December 14, 2009
Creator: Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E. et al.
Object Type: Article
System: The UNT Digital Library
The United Nations Human Rights Council: Issues for Congress (open access)

The United Nations Human Rights Council: Issues for Congress

This report provides historical background of the Council, including the role of the previous Commission. It discusses the Council's current mandate and structure, as well as U.S. policy and congressional actions.
Date: December 14, 2009
Creator: Blanchfield, Luisa
Object Type: Report
System: The UNT Digital Library

Sons of American Revolution - Jacob and Gerald Suddath

Photograph of Gerald Eugene Suddath, Jr. (right) and his son Jacob Suddath dated December 14, 2009.
Date: December 14, 2009
Creator: Brenda Suddath
Object Type: Photograph
System: The Gateway to Oklahoma History
Reversible wetting of NaCl nanoparticles at relative humidities below deliquescence observed by environmental non-contact AFM (open access)

Reversible wetting of NaCl nanoparticles at relative humidities below deliquescence observed by environmental non-contact AFM

The behavior of NaCl nanoparticles as a function of relative humidity (RH) was characterized by depositing particles on a prepared hydrophobic surface and measuring their height via non-contact environmental atomic force microscopy (AFM). Non-contact AFM allows greater sensitivity to changes in the size of particles than does contact AFM or scanning electron microscopy, and greater sensitivity to changes in shape than do mass-based techniques. Crystalline cubic NaCl nanoparticles with sides of 35 to 150 nm were found to reversibly take up water with increasing RH, and to form a liquid-like surface layer of thickness 2 to 4 nm at humidities well below the deliquescence point of 75.0% at 20°C. Measurable uptake begins at 70% RH. The maximum thickness of the layer increases with increasing RH for a given particle size and, for a given RH, increases with increasing particle size over the range studied. The liquid-like behavior of the layer is indicated by a reversible “rounding” at the tops of the particles, where the ratio of particle height to radius of curvature increases from zero (flat top) at 68% RH to 0.7 at 74% RH. These observations suggest that a reorganization of mass occurs on the solid NaCl nanoparticle, and …
Date: December 14, 2009
Creator: Bruzewicz, D.A.; Lewis, E.; Ocko, B. M.; McGraw, R. L. & Schwartz, S. E.
Object Type: Article
System: The UNT Digital Library
Combustion Synthesis of Nanoparticulate LiMgxMn1-xPO4 (x=0, 0.1, 0.2) Carbon Composites (open access)

Combustion Synthesis of Nanoparticulate LiMgxMn1-xPO4 (x=0, 0.1, 0.2) Carbon Composites

A combustion synthesis technique was used to prepare nanoparticulate LiMgxMn1-xPO4 (x=0, 0.1,0.2)/carbon composites. Powders consisted of carbon-coated particles about 30 nm in diameter, which were partly agglomerated into larger secondary particles. The utilization of the active materials in lithium cells depended most strongly upon the post-treatment and the Mg content, and was not influenced by the amount of carbon. Best results were achieved with a hydrothermally treated LiMg0.2Mn0.8PO4/C composite, which exhibited close to 50percent utilization of the theoretical capacity at a C/2 discharge rate.
Date: December 14, 2009
Creator: Doeff, Marca M; Chen, Jiajun; Conry, Thomas E.; Wang, Ruigang; Wilcox, James & Aumentado, Albert
Object Type: Article
System: The UNT Digital Library
RECOMMENDATIONS FOR SAMPLING OF TANK 19 IN F TANK FARM (open access)

RECOMMENDATIONS FOR SAMPLING OF TANK 19 IN F TANK FARM

Representative sampling is required for characterization of the residual material in Tank 19 prior to operational closure. Tank 19 is a Type IV underground waste storage tank located in the F-Tank Farm. It is a cylindrical-shaped, carbon steel tank with a diameter of 85 feet, a height of 34.25 feet, and a working capacity of 1.3 million gallons. Tank 19 was placed in service in 1961 and initially received a small amount of low heat waste from Tank 17. It then served as an evaporator concentrate (saltcake) receiver from February 1962 to September 1976. Tank 19 also received the spent zeolite ion exchange media from a cesium removal column that once operated in the Northeast riser of the tank to remove cesium from the evaporator overheads. Recent mechanical cleaning of the tank removed all mounds of material. Anticipating a low level of solids in the residual waste, Huff and Thaxton [2009] developed a plan to sample the waste during the final clean-up process while it would still be resident in sufficient quantities to support analytical determinations in four quadrants of the tank. Execution of the plan produced fewer solids than expected to support analytical determinations in all four quadrants. Huff …
Date: December 14, 2009
Creator: Harris, S. & Shine, G.
Object Type: Report
System: The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 95, No. 79, Ed. 1 Monday, December 14, 2009 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 95, No. 79, Ed. 1 Monday, December 14, 2009

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date: December 14, 2009
Creator: Hughes, Jamie
Object Type: Newspaper
System: The Gateway to Oklahoma History
Who Regulates Whom? An Overview of U.S. Financial Supervision (open access)

Who Regulates Whom? An Overview of U.S. Financial Supervision

Federal financial regulation in the United States has evolved through a series of piecemeal responses to developments and crises in financial markets. This report provides an overview of current U.S. financial regulation: which agencies are responsible for which institutions and markets, and what kinds of authority they have.
Date: December 14, 2009
Creator: Jickling, Mark & Murphy, Edward V.
Object Type: Report
System: The UNT Digital Library
SQUID-Detected MRI in the Limit of Zero Static Field (open access)

SQUID-Detected MRI in the Limit of Zero Static Field

This thesis describes an implementation of the so-called&quot;zero-field MRI&quot; (ZFMRI) pulse sequence, which allows for imaging in an arbitrarily low B<sub>0</sub> field. The ZFMRI sequence created an effective unidirectional gradient field by using a train of pi pulses to average out the concomitant gradient components during encoding. The signals were acquired using a low-transition temperature dc Superconducting QUantum Interference Device (low-Tc dc SQUID) coupled to a first-order axial gradiometer. The experiments were carried out in a liquid helium dewar which was magnetically shielded with a single-layer mu-metal can around the outside and a superconducting Pb can contained within the helium space. We increased the filling factor of the custom-made, double-walled Pyrex insert by placing the liquid alcohol sample, at a temperature of approximately -50 degrees C, at the center of one loop of the superconducting gradiometer, which was immersed in the helium bath.
Date: December 14, 2009
Creator: Kelso, Nathan Dean
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Historical Evaluation of Film Badge Dosimetry Y-12 Plant: Part 2–Neutron Radiation ORAUT-OTIB-0045 (open access)

Historical Evaluation of Film Badge Dosimetry Y-12 Plant: Part 2–Neutron Radiation ORAUT-OTIB-0045

A summary of the major neutron sources involved in radiation exposures to Y-12 workers is presented in this TIB. Graphical methods are used to evaluate available neutron dose data from quarterly exposures to Y-12 workers and to determine how the data could be used to derive neutron-to-gamma dose ratios for dose reconstruction purposes. This TIB provides estimates of neutron-to-gamma dose ratios for specific departments and a default value for the neutron-to-gamma dose ratio based on the pooled neutron dose data for all Y-12 departments.
Date: December 14, 2009
Creator: Kerr, G. D.; Frome, E. L.; Watkins, J. P. & Tankersley, W. G.
Object Type: Report
System: The UNT Digital Library
The Postal Accountability and Enhancement Act: Overview and Issues for Congress (open access)

The Postal Accountability and Enhancement Act: Overview and Issues for Congress

This report describes Congress's pursuit of postal reform, and summarizes the major provisions of the new postal reform law. The report also suggests PAEA-related oversight issues for Congress. President George W. Bush signed the Postal Accountability and Enhancement Act (PAEA; P.L. 109-435; 120 Stat. 3198) on December 20, 2006. The PAEA was the first broad revision of the 1970 statute that replaced the U.S. Post Office with the U.S. Postal Service (USPS), a self-supporting, independent agency of the executive branch.
Date: December 14, 2009
Creator: Kosar, Kevin R.
Object Type: Report
System: The UNT Digital Library
Ionization of cytosine monomer and dimer studied by VUV photoionization and electronic structure calculations (open access)

Ionization of cytosine monomer and dimer studied by VUV photoionization and electronic structure calculations

We report a combined theoretical and experimental study of ionization of cytosine monomers and dimers. Gas-phase molecules are generated by thermal vaporization of cytosine followed by expansion of the vapor in a continuous supersonic jet seeded in Ar. The resulting species are investigated by single photon ionization with tunable vacuum-ultraviolet (VUV) synchrotron radiation and mass analyzed using reflectron mass spectrometry. Energy onsets for the measured photoionization efficiency (PIE) spectra are 8.60+-0.05 eV and 7.6+-0.1 eV for the monomer and the dimer, respectively, and provide an estimate for the adiabatic ionization energies (AIE). The first AIE and the ten lowest vertical ionization energies (VIEs) for selected isomers of cytosine dimer computed using equation-of-motion coupled-cluster (EOM-IP-CCSD) method are reported. The comparison of the computed VIEs with the derivative of the PIE spectra, suggests that multiple isomers of the cytosine dimer are present in the molecular beam. The calculations reveal that the large red shift (0.7 eV) of the first IE of the lowest-energy cytosine dimer is due to strong inter-fragment electrostatic interactions, i.e., the hole localized on one of the fragments is stabilized by the dipole moment of the other. A sharp rise in the CH+ signal at 9.20+-0.05 eV is ascribed …
Date: December 14, 2009
Creator: Kostko, Oleg; Bravaya, Ksenia; Krylov, Anna & Ahmed, Musahid
Object Type: Article
System: The UNT Digital Library
Homeland Security Department: FY2010 Appropriations (open access)

Homeland Security Department: FY2010 Appropriations

This report describes the FY2010 appropriations for the Department of Homeland Security (DHS). The Administration requested a net appropriation of $44.1 billion in budget authority for FY2010. This amounts to a $2.8 billion, or a 6.7% increase over the $41.2 billion enacted for FY2009 (not including supplemental funding). Total budget authority requested by the Administration for DHS for FY2010 amounts to $55.1 billion.
Date: December 14, 2009
Creator: Lake, Jennifer E. & Haddal, Chad C.
Object Type: Report
System: The UNT Digital Library
"Second International AMMA Conference (November 26-30, 2007)" (open access)

"Second International AMMA Conference (November 26-30, 2007)"

None
Date: December 14, 2009
Creator: Lamb, Peter J.
Object Type: Report
System: The UNT Digital Library
Pressure dependence of the optical properties of the charge-density-wave compound LaTe2 (open access)

Pressure dependence of the optical properties of the charge-density-wave compound LaTe2

We report the pressure dependence of the optical response of LaTe{sub 2}, which is deep in the charge-density-wave (CDW) ground state even at 300 K. The reflectivity spectrum is collected in the mid-infrared spectral range at room temperature and at pressures between 0 and 7 GPa. We extract the energy scale due to the single particle excitation across the CDW gap and the Drude weight. We establish that the gap decreases upon compressing the lattice, while the Drude weight increases. This signals a reduction in the quality of nesting upon applying pressure, therefore inducing a lesser impact of the CDW condensate on the electronic properties of LaTe{sub 2}. The consequent suppression of the CDW gap leads to a release of additional charge carriers, manifested by the shift of weight from the gap feature into the metallic component of the optical response. On the contrary, the power-law behavior, seen in the optical conductivity at energies above the gap excitation and indicating a weakly interacting limit within the Tomonaga-Luttinger liquid scenario, seems to be only moderately dependent on pressure.
Date: December 14, 2009
Creator: Lavagnini, M.; Sacchetti, A.; Degiorgi, L.; Arcangeletti, E.; Baldassarre, L.; Postorino, P. et al.
Object Type: Article
System: The UNT Digital Library
Molecular uranates - laser synthesis of uranium oxide anions in the gas phase (open access)

Molecular uranates - laser synthesis of uranium oxide anions in the gas phase

Laser ablation of solid UO{sub 3} or (NH{sub 4}){sub 2}U{sub 2}O{sub 7} yielded in the gas phase molecular uranium oxide anions with compositions ranging from [UO{sub n}]{sup -} (n = 2-4) to [U{sub 14}O{sub n}]{sup -} (n = 32-35), as detected by Fourier transform ion cyclotron resonance mass spectrometry. The cluster series [U{sub x}O{sub 3x}]{sup -} for x {le} 6 and various [U{sub x}O{sub 3x-y}]{sup -}, in which y increased with increasing x, could be identified. A few anions with H atoms were also present, and their abundance increased when hydrated UO{sub 3} was used in place of anhydrous UO{sub 3}. Collision-induced dissociation experiments with some of the lower m/z cluster anions supported extended structures in which neutral UO{sub 3} constitutes the building block. Cationic uranium oxide clusters [U{sub x}O{sub n}]{sup +} (x = 2-9; n = 3-24) could also be produced and are briefly discussed. Common trends in the O/U ratios for both negative and positive clusters could be unveiled.
Date: December 14, 2009
Creator: Marcalo, Joaquim; Santos, Marta; Pires de Matos, Antonio & Gibson, John K
Object Type: Article
System: The UNT Digital Library
United Nations Assistance Mission in Afghanistan: Background and Policy Issues (open access)

United Nations Assistance Mission in Afghanistan: Background and Policy Issues

This report examines the role of United Nations Assistance Mission in Afghanistan (UNAMA) in Afghanistan and discusses the obstacles the organization faces in coordinating international efforts and explores related policy issues and considerations for the 112th Congress.
Date: December 14, 2009
Creator: Margesson, Rhoda
Object Type: Report
System: The UNT Digital Library
Measurements of Black Carbon Particles Chemical, Physical, and Optical Properties (open access)

Measurements of Black Carbon Particles Chemical, Physical, and Optical Properties

Accurate measurements of the chemical, physical, and optical properties of aerosol particles containing black carbon are necessary to improve current estimates of the radiative forcing in the atmosphere. A collaborative research effort between Aerodyne Research, Inc. and Boston College has focused on conducting field and laboratory experiments on carbonaceous particles and the development and characterization of new particulate instrumentation. This presentation will focus on the chemical, physical, and optical properties of black carbon particles measured in the laboratory in order to understand the effects of atmospheric processing on black carbon particles. Results from a three-week study during July 2008 of mass- and optical-based black carbon measurements will be presented. The project utilized the Boston College laboratory flame apparatus and aerosol conditioning and characterization equipment. A pre-mixed flat flame burner operating at controlled fuel-to-air ratios produced stable and reproducible concentrations of soot particles with known sizes, morphologies, and chemical compositions. In addition, other black carbon particle types, including fullerene soot, glassy carbon spheres, oxidized flame soot, Regal black, and Aquadag, were also atomized, size selected, and sampled. The study covered an experimental matrix that systematically selected particle mobility size (30 to 300 nm) and black carbon particle mass, particle number concentration, …
Date: December 14, 2009
Creator: Onasch, T.B.; Sedlacek, A.; Cross, E. S.; Davidovits, P.; Worsnop, D. R.; Ahern, A. et al.
Object Type: Article
System: The UNT Digital Library
Liquefied Natural Gas (LNG) Import Terminals: Siting, Safety, and Regulation (open access)

Liquefied Natural Gas (LNG) Import Terminals: Siting, Safety, and Regulation

This report provides an overview of recent industry development of new LNG import terminals. The report summarizes LNG hazards and the industry's safety record. It discusses federal laws and regulations related to LNG terminal siting with a focus on the authorities of key federal agencies and safety provisions in the permitting of onshore facilities.
Date: December 14, 2009
Creator: Parfomak, Paul W. & Vann, Adam
Object Type: Report
System: The UNT Digital Library
Water Quality Sampling Locations Along the Shoreline of the Columbia River, Hanford Site, Washington (open access)

Water Quality Sampling Locations Along the Shoreline of the Columbia River, Hanford Site, Washington

As environmental monitoring evolved on the Hanford Site, several different conventions were used to name or describe location information for various sampling sites along the Hanford Reach of the Columbia River. These methods range from handwritten descriptions in field notebooks to the use of modern electronic surveying equipment, such as Global Positioning System receivers. These diverse methods resulted in inconsistent archiving of analytical results in various electronic databases and published reports because of multiple names being used for the same site and inaccurate position data. This document provides listings of sampling sites that are associated with groundwater and river water sampling. The report identifies names and locations for sites associated with sampling: (a) near-river groundwater using aquifer sampling tubes; (b) riverbank springs and springs areas; (c) pore water collected from riverbed sediment; and (d) Columbia River water. Included in the listings are historical names used for a particular site and the best available geographic coordinates for the site, as of 2009. In an effort to create more consistency in the descriptive names used for water quality sampling sites, a naming convention is proposed in this document. The convention assumes that a unique identifier is assigned to each site that is …
Date: December 14, 2009
Creator: Peterson, Robert E. & Patton, Gregory W.
Object Type: Report
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, December 14, 2009 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Monday, December 14, 2009

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: December 14, 2009
Creator: Pittman, Jerry & Wray, Kelly
Object Type: Newspaper
System: The Gateway to Oklahoma History
SALTSTONE 3QCY09 TCLP RESULTS (open access)

SALTSTONE 3QCY09 TCLP RESULTS

A Saltstone waste form was prepared in the Savannah River National Laboratory (SRNL) from a Tank 50H sample and Z-Area premix material for the third quarter of calendar year 2009 (3QCY09). After the prescribed 28 day cure, samples of the saltstone were collected, and the waste form was shown to meet the South Carolina Hazardous Waste Management Regulations (SCHWMR) R.61-79.261.24 and R.61-79.268.48(a) requirements for a nonhazardous waste form with respect to RCRA metals and underlying hazardous constituents. These analyses met all quality assurance specifications of USEPA SW-846. The Saltstone Production Facility (SPF) receives waste from Tank 50H for treatment. In the third quarter of the 2009 calendar year (3QCY09), Tank 50H accepted transfers of approximately 37 kgal from the Effluent Treatment Project (ETP) waste, approximately 5 kgal from Tank 710 - the H-Canyon General Purpose Evaporator, approximately 26 kgal from Tank 221H, approximately 319 kgal from the Modular Caustic Side Solvent Extraction Unit (MCU) Decontaminated Salt Solution Hold Tank (DSS-HT), and approximately 358 kgal from Tank 23H. The Saltstone Grout Sampling plan provides the South Carolina Department of Health and Environmental Control (SCDHEC) with the chemical and physical characterization strategy for the salt solution which is to be disposed of …
Date: December 14, 2009
Creator: Reigel, M.
Object Type: Report
System: The UNT Digital Library
Sweetwater Reporter (Sweetwater, Tex.), Vol. 112, No. 26, Ed. 1 Monday, December 14, 2009 (open access)

Sweetwater Reporter (Sweetwater, Tex.), Vol. 112, No. 26, Ed. 1 Monday, December 14, 2009

Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date: December 14, 2009
Creator: Rodriguez, Tatiana
Object Type: Newspaper
System: The Portal to Texas History