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10,713 Matching Results
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Physics at future hadron colliders
We discuss the physics opportunities and detector challenges at future hadron colliders. As guidelines for energies and luminosities we use the proposed luminosity and/or energy upgrade of the LHC (SLHC), and the Fermilab design of a Very Large Hadron Collider (VLHC). We illustrate the physics capabilities of future hadron colliders for a variety of new physics scenarios (supersymmetry, strong electroweak symmetry breaking, new gauge bosons, compositeness and extra dimensions). We also investigate the prospects of doing precision Higgs physics studies at such a machine, and list selected Standard Model physics rates.
Date:
December 23, 2002
Creator:
al., U. Baur et
Object Type:
Article
System:
The UNT Digital Library
Proceedings of Riken Bnl Research Center Workshop. 2002 Summer Program: Current and Future Directions at Rhic, Aug.5 - 23, 2002.
None
Date:
December 23, 2002
Creator:
Deshpande, A.; Dumitru, A.; Jalilian Marian, J.; Saito, N.; Teaney, D.; Venugopalan, R. et al.
Object Type:
Report
System:
The UNT Digital Library
Report of Snowmass 2001 working group E2: Electron - positron colliders from the phi to the Z
We report on the status and plans of experiments now running or proposed for electron-positron colliders at energies between the {phi} and the Z. The e{sup +}e{sup -}B and charm factories we considered were PEP-II/BABAR, KEKB/Belle, superKEK, SuperBABAR, and CESR-c/CLEO-c. We reviewed the programs at the {phi} factory at Frascati and the proposed PEP-N facility at Stanford Linear Accelerator Center. We studied the prospects for B physics with a dedicated linear collider Z factory, associated with the TESLA high energy linear collider. In all cases, we compared the physics reach of these facilities with that of alternative experiments at hadron colliders or fixed target facilities.
Date:
December 23, 2002
Creator:
al., Zhen-guo Zhao et
Object Type:
Article
System:
The UNT Digital Library
Run scenarios for the linear collider
We have examined how a Linear Collider program of 1000 fb{sup -1} could be constructed in the case that a very rich program of new physics is accessible at {radical}s {le} 500 GeV. We have examined possible run plans that would allow the measurement of the parameters of a 120 GeV Higgs boson, the top quark, and could give information on the sparticle masses in SUSY scenarios in which many states are accessible. We find that the construction of the run plan (the specific energies for collider operation, the mix of initial state electron polarization states, and the use of special e{sup -}e{sup -} runs) will depend quite sensitively on the specifics of the supersymmetry model, as the decay channels open to particular sparticles vary drastically and discontinuously as the underlying SUSY model parameters are varied. We have explored this dependence somewhat by considering two rather closely related SUSY model points. We have called for operation at a high energy to study kinematic end points, followed by runs in the vicinity of several two body production thresholds once their location is determined by the end point studies. For our benchmarks, the end point runs are capable of disentangling most sparticle …
Date:
December 23, 2002
Creator:
al., M. Battaglia et
Object Type:
Article
System:
The UNT Digital Library
Strategies for Application of Isotopic Uncertainties in Burnup Credit
Uncertainties in the predicted isotopic concentrations in spent nuclear fuel represent one of the largest sources of overall uncertainty in criticality calculations that use burnup credit. The methods used to propagate the uncertainties in the calculated nuclide concentrations to the uncertainty in the predicted neutron multiplication factor (k{sub eff}) of the system can have a significant effect on the uncertainty in the safety margin in criticality calculations and ultimately affect the potential capacity of spent fuel transport and storage casks employing burnup credit. Methods that can provide a more accurate and realistic estimate of the uncertainty may enable increased spent fuel cask capacity and fewer casks needing to be transported, thereby reducing regulatory burden on licensee while maintaining safety for transporting spent fuel. This report surveys several different best-estimate strategies for considering the effects of nuclide uncertainties in burnup-credit analyses. The potential benefits of these strategies are illustrated for a prototypical burnup-credit cask design. The subcritical margin estimated using best-estimate methods is discussed in comparison to the margin estimated using conventional bounding methods of uncertainty propagation. To quantify the comparison, each of the strategies for estimating uncertainty has been performed using a common database of spent fuel isotopic assay measurements …
Date:
December 23, 2002
Creator:
Gauld, I. C.
Object Type:
Report
System:
The UNT Digital Library
Summary: Working Group on QCD and Strong Interactions
In this summary of the considerations of the QCD working group at Snowmass 2001, the roles of quantum chromodynamics in the Standard Model and in the search for new physics are reviewed, with empahsis on frontier areas in the field. We discuss the importance of, and prospects for, precision QCD in perturbative and lattice calculations. We describe new ideas in the analysis of parton distribution functions and jet structure, and review progress in small-x and in polarization experiments.
Date:
December 23, 2002
Creator:
al., Edmond L. Berger et
Object Type:
Article
System:
The UNT Digital Library
Telecommunications Services Trade and the WTO Agreement
None
Date:
December 23, 2002
Creator:
Villarreal, M. Angeles
Object Type:
Report
System:
The UNT Digital Library
Texas Attorney General Opinion: GA-3
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification; authority of the Texas Department of Transporation over construction and maintenance of utility lines along a controlled-access highway (RQ-0563-JC)
Date:
December 23, 2002
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-4
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification; Whether the Euless Economic Development Corporation is "a governmental entity that has the power of eminent domain" under section 272.001(b)(5) of the Local Government Code (RQ-0568-JC)
Date:
December 23, 2002
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-5
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification; Authority of a district attorney pro tem to modify a standing local government between a district attorney's office and a law enforcement agency regarding the distribution of forfeited funds (RQ-0569-JC)
Date:
December 23, 2002
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-6
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Whether a member of the legislature who resigns his or her legislative office may, during the term for which he or she was elected, be appointed to a position or office that requires senate confirmation. (RQ-05740JC)
Date:
December 23, 2002
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Disease Prevention News, Volume 62, Number 26, December 2002
Newsletter of the Texas Department of Health discussing the news, activities, and events of the organization and other information related to health in Texas. This issue includes the annual index for 2002.
Date:
December 23, 2002
Creator:
Texas. Department of Health.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Top and higgs physics at the Tevatron
We present a summary of our experimental understanding of the top quark and discuss the significant improvements expected in Run II at the Fermilab Tevatron Collider. We also discuss prospects for a Higgs boson discovery at the Tevatron.
Date:
December 23, 2002
Creator:
Savard, Pierre
Object Type:
Article
System:
The UNT Digital Library
Travel Cards: Control Weaknesses Leave Navy Vulnerable to Fraud and Abuse
A letter report issued by the General Accounting Office with an abstract that begins "Poor oversight and management of DOD's travel card program has led to high delinquency rates, costing DOD millions in lost rebates and increased ATM fees. As a result, the Congress asked GAO to report on (1) the magnitude, impact, and cause of delinquencies, (2) the types of fraudulent and abusive uses of the travel card, and (3) the effectiveness of internal controls over DOD's travel card program. GAO previously reported on travel card management at the Army. This report focuses on travel card management at the Navy, including the Marine Corps."
Date:
December 23, 2002
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
What ignites optical jets?
The properties of radio galaxies and quasars with and without optical or X-ray jets are compared. The majority of jets from which high-frequency emission has been detected so far (13 with optical emission, 11 with X-rays, 13 with both) are associated with the most powerful radio sources at any given redshift. It is found that optical/X-ray jet sources are more strongly beamed than the average population of extragalactic radio sources. This suggests that the detection or non-detection of optical emission from jets has so far been dominated by surface brightness selection effects, not by jet physics. It implies that optical jets are much more common than is currently appreciated.
Date:
December 23, 2002
Creator:
Jester, Sebastian
Object Type:
Article
System:
The UNT Digital Library
Seismic Monitoring System Calibration Using Ground Truth Database
Calibration of a seismic monitoring system remains a major issue due to the lack of ground truth information and uncertainties in the regional geological parameters. Rapid and accurate identification of seismic events is currently not feasible due to the absence of a fundamental framework allowing immediate access to ground truth information for many parts of the world. Precise location and high-confidence identification of regional seismic events are the primary objectives of monitoring research in seismology. In the Department of Energy Knowledge Base (KB), ground truth information addresses these objectives and will play a critical role for event relocation and identification using advanced seismic analysis tools. Maintaining the KB with systematic compilation and analysis of comprehensive sets of geophysical data from various parts of the world is vital. The goal of this project is to identify a comprehensive database for China using digital seismic waveform data that are currently unavailable. These data may be analyzed along with ground truth information that becomes available. To date, arrival times for all regional phases are determined on all events above Mb 4.5 that occurred in China in 2000 and 2001. Travel-time models are constructed to compare with existing models. Seismic attenuation models may be …
Date:
December 22, 2002
Creator:
Chan, Winston & Wagner, Robert
Object Type:
Report
System:
The UNT Digital Library
The superconducting solenoid magnets for MICE
The Muon Ionization Cooling Experiment (MICE) is a channel of superconducting solenoid magnets. The magnets in MICE are around the RF cavities, absorbers (liquid or solid) and the primary particle detectors [1], [2]. The MICE superconducting solenoid system consists of eighteen coils that are grouped in three types of magnet assemblies. The cooling channel consists of two complete cell of an SFOFO cooling channel. Each cell consists of a focusing coil pair around an absorber and a coupling coil around a RF cavity that re-accelerates the muons to their original momentum. At the ends of the experiment are uniform field solenoids for the particle detectors and a set of matching coils used to match the muon beam to the cooling cells. Three absorbers are used instead of two in order to shield the detectors from dark currents generated by the RF cavities at high operating acceleration gradients.
Date:
December 22, 2002
Creator:
Green, Michael A.
Object Type:
Report
System:
The UNT Digital Library
Courthouse Cornerstones, Volume 3, Number 1, Winter 2002
Annual progress report for the Texas Historic Courthouse Preservation Program outlining courthouses of importance and projects that are finished, ongoing, and planned.
Date:
Winter 2002
Creator:
Texas Historic Courthouse Preservation Program
Object Type:
Report
System:
The Portal to Texas History
Feasibility Study for a Recirculating Linac-Based Facility for Femtosecond Dynamics
LBNL is pursuing design studies and the scientific program for a facility dedicated to the production of x-ray pulses with ultra-short time duration, for application in dynamical studies of processes in physics, biology, and chemistry. The proposed x-ray facility has the short x-ray pulse length ({approx}60 fs FWHM) necessary to study very fast dynamics, high flux (up to approximately 10E11 photons/sec/0.1 percentBW) to study weakly scattering systems, and tuneability over 1-12 keV photon energy. The hard x-ray photon production section of the machine accommodates seven 2-m long undulators. Design studies for longer wavelength sources, using high-gain harmonic generation, are in progress. The x-ray pulse repetition rate of 10 kHz is matched to studies of dynamical processes (initiated by ultra-short laser pulses) that typically have a long recovery time or are not generally cyclic or reversible and need time to allow relaxation, replacement, or flow of the sample. The technique for producing ultra-short x-ray pulses uses relatively long electron bunches to minimize high-peak-current collective effects, and the ultimate x-ray duration is achieved by a combination of bunch manipulation and optical compression. Synchronization of x-ray pulses to sample excitation signals is expected to be of order 50 - 100 fs. Techniques for …
Date:
December 21, 2002
Creator:
Corlett, J. N.; Barry, W.; Barletta, W. A.; Byrd, J. M.; DeSantis, S.; Doolittle, L. et al.
Object Type:
Report
System:
The UNT Digital Library
On The Road With..., Volume 2, Number 3, Winter 2002
Newsletter of the Texas Rural Passenger Safety Education program discussing news and events about the program, as well as product recalls and topics related transportation safety issues.
Date:
Winter 2002
Creator:
Texas Agricultural Extension Service
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Radiation-Induced Topological Disorder in Irradiated Network Structures
This report summarizes results of a research program investigating the fundamental principles underlying the phenomenon of topological disordering in a radiation environment. This phenomenon is known popularly as amorphization, but is more formally described as a process of radiation-induced structural arrangement that leads in crystals to loss of long-range translational and orientational correlations and in glasses to analogous alteration of connectivity topologies. The program focus has been on a set compound ceramic solids with directed bonding exhibiting structures that can be described as networks. Such solids include SiO2, Si3N4, SiC, which are of interest to applications in fusion energy production, nuclear waste storage, and device manufacture involving ion implantation or use in radiation fields. The principal investigative tools comprise a combination of experimental diffraction-based techniques, topological modeling, and molecular-dynamics simulations that have proven a rich source of information in the preceding support period. The results from the present support period fall into three task areas. The first comprises enumeration of the rigidity constraints applying to (1) more complex ceramic structures (such as rutile, corundum, spinel and olivine structures) that exhibit multiply polytopic coordination units or multiple modes of connecting such units, (2) elemental solids (such as graphite, silicon and diamond) …
Date:
December 21, 2002
Creator:
Hobbs, Linn W.
Object Type:
Report
System:
The UNT Digital Library
Relationship of adiposity to the population distribution of plasma triglyceride concentrations in vigorously active men and women
Context and Objective: Vigorous exercise, alcohol and weight loss are all known to increase HDL-cholesterol, however, it is not known whether these interventions raise low HDL as effectively as has been demonstrated for normal HDL. Design: Physician-supplied medical data from 7,288 male and 2,359 female runners were divided into five strata according to their self-reported usual running distance, reported alcohol intake, body mass index (BMI) or waist circumference. Within each stratum, the 5th, 10th, 25th, 50th, 75th, 90th, and 95th percentiles for HDL-cholesterol were then determined. Bootstrap resampling of least-squares regression was applied to determine the cross-sectional relationships between these factors and each percentile of the HDL-cholesterol distribution. Results: In both sexes, the rise in HDL-cholesterol per unit of vigorous exercise or alcohol intake was at least twice as great at the 95th percentile as at the 5th percentile of the HDL-distribution. There was also a significant graded increase in the slopes relating exercise (km run) and alcohol intake to HDL between the 5th and the 95th percentile. Men's HDL-cholesterol decreased in association with fatness (BMI and waist circumference) more sharply at the 95th than at the 5th percentile of the HDL-distribution. Conclusions: Although exercise, alcohol and adiposity were all …
Date:
December 21, 2002
Creator:
Williams, Paul T.
Object Type:
Article
System:
The UNT Digital Library
South Texas Natives, Volume 2, Number 2, Winter 2002
Newsletter of the South Texas Natives program, an initiative to develop and promote native plants for the restoration and reclamation of habitats on private and public lands. It describes projects undertaken by the Caesar Kleberg Wildlife Research Institute and provides other relevant information about natural habitats and plants.
Date:
Winter 2002
Creator:
Caesar Kleberg Wildlife Research Institute
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Shores, Volume 34, Number 4, Winter 2002
Quarterly magazine of the Texas Sea Grant College Program discussing news, events, and other information related to the Texas marine environment.
Date:
Winter 2002
Creator:
Texas A & M University. Sea Grant College Program.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History