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Measurement of the Spin of the $\Xi(1530)$ Resonance (open access)

Measurement of the Spin of the $\Xi(1530)$ Resonance

The properties of the {Xi}(1530) resonance are investigated in the {Lambda}{sub c}{sup +} {yields} {Xi}{sup -}{pi}{sup +}K{sup +} decay process. The data sample was collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e{sup +}e{sup -} collider operating at center of mass energies 10.58 and 10.54 GeV. The corresponding integrated luminosity is approximately 230 fb{sup -1}. The spin of the {Xi}(1530) is established to be 3/2. The existence of an S-wave amplitude in the {Xi}{sup -}{pi}{sup +} system is inferred, and its interference with the {Xi}(1530)0 amplitude provides the first clear demonstration of the Breit-Wigner phase motion expected for the {Xi}(1530). The P{sub 1}(cos {theta}{sub {Xi}{sup -}}) Legendre polynomial moment indicates the presence of a significant S-wave amplitude for {Xi}{sup -}{pi}{sup +} mass values above 1.6 GeV/c{sup 2}, and a dip in the mass distribution at approximately 1.7 GeV/c{sup 2} is interpreted as due to coherent addition of a {Xi}(1690){sup 0} contribution to this amplitude. This would imply J{sup P} = 1/2{sup -} for the {Xi}(1690). Attempts at fitting the {Xi}(1530){sup 0} lineshape yield unsatisfactory results, and this failure is attributed to interference effects associated with the amplitudes describing the K{sup +}{pi}{sup +} and/or {Xi}{sup -}K{sup +} systems.
Date: March 25, 2008
Creator: Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prudent, X. et al.
Object Type: Article
System: The UNT Digital Library
Particulate matter chemistry and dynamics in the Twilight Zone at VERTIGO ALOHA and K2 Sites (open access)

Particulate matter chemistry and dynamics in the Twilight Zone at VERTIGO ALOHA and K2 Sites

Understanding particle dynamics in the 'Twilight Zone' is critical to prediction of the ocean's carbon cycle. As part of the VERTIGO (VERtical Transformations In the Global Ocean) project, this rarely sampled regime extending from the base of the euphotic layer to 1000 m, was characterized by double-paired day/night Multiple Unit Large Volume in-situ Filtration System (MULVFS) deployments and by {approx}100 high-frequency CTD/transmissometer/turbidity sensor profiles. VERTIGO studies lasting three weeks, contrasted oligotrophic station ALOHA (22.75{sup o}N 158{sup o}W), sampled in June-July 2004, with a biologically productive location (47{sup o}N 161{sup o}E) near station K2 in the Oyashio, occupied July-August 2005. Profiles of major and minor particulate components (C{sub org}, N, P, Ca, Si, Sr, Ba, Mn) in <1, 1-51, and >51 {micro}m size fractions, in-water optics, neutrally buoyant sediment trap (NBST) fluxes, and zooplankton data were intercompared. MULVFS total C{sub org} and C-Star particle beam attenuation coefficient (C{sub P}) were consistently related at both sites with a 27 {micro}M m{sup -1} conversion factor. 26 At K2, C{sub P} profiles further showed a multitude of transient spikes throughout the water column and spike abundance profiles closely paralleled the double peaked abundance profiles of zooplankton. Also at K2, copepods contributed {approx}40% and 10%, …
Date: March 25, 2008
Creator: Bishop, James K.B. & Wood, T.J.
Object Type: Article
System: The UNT Digital Library
Metal Hydroxide Derivatives Containing Chemically Bound Organophosphorus or Polyphosphate Species as Flame Retardants (open access)

Metal Hydroxide Derivatives Containing Chemically Bound Organophosphorus or Polyphosphate Species as Flame Retardants

Patent relating to metal hydroxide derivatives containing chemically bound organophosphorus or polyphosphate species as flame retardants.
Date: November 15, 2002
Creator: Braterman, Paul S.; D'Souza, Nandika & Dharia, Amit
Object Type: Patent
System: The UNT Digital Library
Spatial Dependence of Condensates in Strongly Coupled Gauge Theories (open access)

Spatial Dependence of Condensates in Strongly Coupled Gauge Theories

We analyze quark and gluon condensates in quantum chromodynamics. We suggest that these are localized inside hadrons, because the particles whose interactions are responsible for them are confined within these hadrons. This can explain the results of recent studies of gluon condensate contributions to vacuum correlators. We also give a general discussion of condensates in asymptotically free vectorial and chiral gauge theories.
Date: March 25, 2008
Creator: Brodsky, Stanley J.; /SLAC /SUNY, Stony Brook; Shrock, Robert & /SUNY, Stony Brook
Object Type: Article
System: The UNT Digital Library
Standard Model Condensates and the Cosmological Constant (open access)

Standard Model Condensates and the Cosmological Constant

This paper suggests a solution to the problem of some apparently excessive contributions to the cosmological constant from Standard-Model condensates.
Date: March 25, 2008
Creator: Brodsky, Stanley J.; /SLAC /SUNY, Stony Brook; Shrock, Robert & /SUNY, Stony Brook
Object Type: Article
System: The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 116, No. 59, Ed. 1 Tuesday, March 25, 2008 (open access)

Perry Daily Journal (Perry, Okla.), Vol. 116, No. 59, Ed. 1 Tuesday, March 25, 2008

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date: March 25, 2008
Creator: Brown, Gloria
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 109, No. 254, Ed. 1 Tuesday, March 25, 2008 (open access)

The Altus Times (Altus, Okla.), Vol. 109, No. 254, Ed. 1 Tuesday, March 25, 2008

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: March 25, 2008
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Boerne Star (Boerne, Tex.), Vol. 102, No. 25, Ed. 1 Tuesday, March 25, 2008 (open access)

The Boerne Star (Boerne, Tex.), Vol. 102, No. 25, Ed. 1 Tuesday, March 25, 2008

Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date: March 25, 2008
Creator: Cartwright, Brian
Object Type: Newspaper
System: The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 88, No. 85, Ed. 1 Tuesday, March 25, 2008 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 88, No. 85, Ed. 1 Tuesday, March 25, 2008

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: March 25, 2008
Creator: Clements, Clifford E.
Object Type: Newspaper
System: The Portal to Texas History
Quantum Operation Time Reversal (open access)

Quantum Operation Time Reversal

The dynamics of an open quantum system can be described by a quantum operation: A linear, complete positive map of operators. Here, I exhibit a compact expression for the time reversal of a quantum operation, which is closely analogous to the time reversal of a classical Markov transition matrix. Since open quantum dynamics are stochastic, and not, in general, deterministic, the time reversal is not, in general, an inversion of the dynamics. Rather, the system relaxes toward equilibrium in both the forward and reverse time directions. The probability of a quantum trajectory and the conjugate, time reversed trajectory are related by the heat exchanged with the environment.
Date: March 25, 2008
Creator: Crooks, Gavin E.
Object Type: Article
System: The UNT Digital Library
Repository Planning Checklist and Guidance (open access)

Repository Planning Checklist and Guidance

This document introduces the Planning Tool for Trusted Electronic Repositories (PLATTER) toolkit which assists repositories in setting the necessary objectives and targets for achieving trustworthiness. PLATTER is not in itself an audit or certification tool but is rather designed to complement existing audit and certification tools by providing a framework which will allow new repositories to incorporate the goal of achieving trust into their planning from an early stage. A repository planned using PLATTER will find itself in a strong position when it subsequently comes to apply one of the existing auditing tools to confirm the adequacy of its procedures for maintaining the long term usability of and access to its material.
Date: March 25, 2008
Creator: DigitalPreservationEurope (DPE)
Object Type: Book
System: The UNT Digital Library
Gluon scattering in N=4 super-Yang-Mills theory fromweak to strong coupling (open access)

Gluon scattering in N=4 super-Yang-Mills theory fromweak to strong coupling

I describe some recent developments in the understanding of gluon scattering amplitudes in N = 4 super-Yang-Mills theory in the large-N{sub c} limit. These amplitudes can be computed to high orders in the weak coupling expansion, and also now at strong coupling using the AdS/CFT correspondence. They hold the promise of being solvable to all orders in the gauge coupling, with the help of techniques based on integrability. They are intimately related to expectation values for polygonal Wilson loops composed of light-like segments.
Date: March 25, 2008
Creator: Dixon, Lance J.
Object Type: Article
System: The UNT Digital Library
Surveillance of site A and plot M, report for 2007. (open access)

Surveillance of site A and plot M, report for 2007.

The results of the environmental surveillance program conducted at Site A/Plot M in the Palos Forest Preserve area for Calendar Year 2007 are presented. Based on the results of the 1976-1978 radiological characterization of the site, a determination was made that a surveillance program be established. The characterization study determined that very low levels of hydrogen-3 (as tritiated water) had migrated from the burial ground and were present in two nearby hand pumped picnic wells. The current surveillance program began in 1980 and consists of sample collection and analysis of surface and subsurface water. The results of the analyses are used to: (1) monitor the migration pathway of water from the burial ground (Plot M) to the hand-pumped picnic wells, (2) establish if other buried radionuclides have migrated, and (3) monitor the presence of radioactive materials in the environment of the area. Hydrogen-3 in the Red Gate Woods picnic wells was still detected this year, but the average and maximum concentrations were significantly less than found earlier. Hydrogen-3 continues to be detected in a number of wells, boreholes, dolomite holes, and a surface stream. Analyses since 1984 have indicated the presence of low levels of strontium-90 in water from a …
Date: March 25, 2008
Creator: Golchert, N. W. & Oversight, ESH /QA
Object Type: Report
System: The UNT Digital Library

[Rossana Boyd in office]

Photograph of Rossana Boyd in her office in the College of Education. There are shelves behind her with books and binders on them and there are storage organizers are on the bottom shelf.
Date: March 25, 2008
Creator: Ha, Khai
Object Type: Photograph
System: The UNT Digital Library
A simple low-frequency BPM (open access)

A simple low-frequency BPM

None
Date: March 25, 2008
Creator: Heifets, S.; Novokhatski & Aleksandrov, A.
Object Type: Report
System: The UNT Digital Library
Rains County Leader (Emory, Tex.), Vol. 120, No. 41, Ed. 1 Tuesday, March 25, 2008 (open access)

Rains County Leader (Emory, Tex.), Vol. 120, No. 41, Ed. 1 Tuesday, March 25, 2008

Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.
Date: March 25, 2008
Creator: Hill, Earl Clyde, Jr.
Object Type: Newspaper
System: The Portal to Texas History
Fast Diagnostic For Electrical Breakdowns In Vacuum (open access)

Fast Diagnostic For Electrical Breakdowns In Vacuum

The design of an inexpensive, small, high bandwidth diagnostic for the study of vacuum insulator flashover is described. The diagnostic is based on the principle of capacitive coupling and is commonly referred to as a D-dot probe due to its sensitivity to the changing of the electric displacement field. The principle challenge for the design proved to be meeting the required mechanical size for the application rather than bandwidth. An array of these probes was fabricated and used in an insulator test stand. Data from the test stand with detailed analysis is presented. A highlight of the application of the probes to the test stand was the ability to detect the charging of the insulator surface by UV illumination as a prelude to the insulator flashover. The abrupt change in the insulator's surface charge during the flashover was also detected.
Date: March 25, 2008
Creator: Houck, T L; Javedani, J B & Lahowe, D A
Object Type: Report
System: The UNT Digital Library
Escherichia Coli CSRB Gene and RNA Encoded Thereby (open access)

Escherichia Coli CSRB Gene and RNA Encoded Thereby

Patent regarding the synthesis, uses and compositions of crystal hydrogels.
Date: November 15, 2002
Creator: Hu, Zhibing; Lu, Xihua; Gao, Jun; Cai, Tong; Huang, Gang & Zhou, Bo
Object Type: Patent
System: The UNT Digital Library
Synthesis, Uses and Compositions of Crystal Hydrogels (open access)

Synthesis, Uses and Compositions of Crystal Hydrogels

Patent relating to the synthesis, uses and compositions of crystal hydrogels.
Date: November 15, 2002
Creator: Hu, Zhibing; Lu, Xihua; Gao, Jun; Cai, Tong; Huang, Gang & Zhou, Bo
Object Type: Patent
System: The UNT Digital Library
[Interview with Adelma Benavente Garcia] (open access)

[Interview with Adelma Benavente Garcia]

This transcript is the record of an interview with photographer Adelma Benavente Garcia about how technology affects her work as part of a lecture series, "Women Art Technology." During the interview, Garcia discusses the projects she has worked on to preserve photographs in the Andes mountains and other parts of Peru. The transcript includes a brief introduction with a biography of Garcia and general information about the lecture series and the specific interview. A list of 'Suggested reading' materials is also listed at the end of the transcript.
Date: March 25, 2008
Creator: Kidd, Allison & Westrup, Sarah
Object Type: Text
System: The UNT Digital Library

Master's Recital: 2008-03-25 - Daewook Kim, trumpet

Access: Use of this item is restricted to the UNT Community
Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Master of Music (MM) degree.
Date: March 25, 2008
Creator: Kim, Daewook
Object Type: Sound
System: The UNT Digital Library
Aviation Spending Guarantee Mechanisms (open access)

Aviation Spending Guarantee Mechanisms

The report discusses the cap and penalty Era, Airport and airway safety and capacity expansion act of 1987, Current FAA Funding Guarantees and Funding guarantee options.
Date: March 25, 2008
Creator: Kirk, Robert S.
Object Type: Report
System: The UNT Digital Library
Broadband Internet Access and the Digital Divide: Federal Assistance Programs (open access)

Broadband Internet Access and the Digital Divide: Federal Assistance Programs

This report is on Broadband Internet Access and the Digital Divide: Federal Assistance Programs.
Date: March 25, 2008
Creator: Kruger, Lennard G. & Gilroy, Angele A.
Object Type: Report
System: The UNT Digital Library
Aging Infrastructure: Dam Safety (open access)

Aging Infrastructure: Dam Safety

To help inform discussions on the federal role in dam safety, this report provides background information on the nation’s dam safety activities and funding mechanisms.
Date: March 25, 2008
Creator: Lane, Nic
Object Type: Report
System: The UNT Digital Library