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Inclusive Search for Squark and Gluino Production in p anti-p Collisions at s**(1/2) = 1.96-TeV
We report on a search for inclusive production of squarks and gluinos in p{bar p} collisions at {radical}s = 1.96 TeV, in events with large missing transverse energy and multiple jets of hadrons in the final state. The study uses a CDF Run II data sample corresponding to 2 fb-1 of integrated luminosity. The data are in good agreement with the standard model predictions, giving no evidence for any squark or gluino component. In an R-parity conserving minimal supergravity scenario with A{sub 0} = 0, mu < 0 and tan beta = 5, 95% C.L. upper limits on the production cross sections in the range between 0.1 pb and 1 pb are obtained, depending on the squark and gluino masses considered. For gluino masses below 280 GeV/c2, arbitrarily large squark masses are excluded at the 95%C.L., while for mass degenerate gluinos and squarks, masses below 392 GeV/c2 are excluded at the 95% C.L.
Date:
November 1, 2008
Creator:
Aaltonen, T.; Adelman, J.; Akimoto, T.; Albrow, M. G.; Alvarez Gonzalez, B.; Amerio, S. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the k(T) Distribution of Particles in Jets Produced in p anti-p Collisions at s**(1/2) = 1.96-TeV
We present a measurement of the transverse momentum with respect to the jet axis (k{sub T}) of particles in jets produced in p{bar p} collisions at {radical}s = 1.96 TeV. Results are obtained for charged particles within a cone of opening angle 0.5 radians around the jet axis in events with dijet invariant masses between 66 and 737 GeV/c{sup 2}. The experimental data are compared to theoretical predictions obtained for fragmentation partons within the framework of resummed perturbative QCD using the modified leading log and next-to-modified leading log approximations. The comparison shows that trends in data are successfully described by the theoretical predictions, indicating that the perturbative QCD stage of jet fragmentation is dominant in shaping basic jet characteristics.
Date:
November 1, 2008
Creator:
Aaltonen, T.; Adelman, J.; Akimoto, T.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, Dante E. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of W-Boson Helicity Fractions in Top-Quark Decays Using costheta*
None
Date:
November 1, 2008
Creator:
Aaltonen, T.; Adelman, J.; Akimoto, T.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, Dante E. et al.
Object Type:
Article
System:
The UNT Digital Library
A search for high-mass resonances decaying to dimuons at CDF
None
Date:
November 1, 2008
Creator:
Aaltonen, T.; Phys., /Helsinki Inst. of; Adelman, J.; /Chicago U., EFI; Akimoto, T.; U., /Tsukuba et al.
Object Type:
Article
System:
The UNT Digital Library
DWPF GLASS BEADS AND GLASS FRIT TRANSPORT DEMONSTRATION
DWPF is considering replacing irregularly shaped glass frit with spherical glass beads in the Slurry Mix Evaporator (SME) process to decrease the yield stress of the melter feed (a non-Newtonian Bingham Plastic). Pilot-scale testing was conducted on spherical glass beads and glass frit to determine how well the glass beads would transfer when compared to the glass frit. Process Engineering Development designed and constructed the test apparatus to aid in the understanding and impacts that spherical glass beads may have on the existing DWPF Frit Transfer System. Testing was conducted to determine if the lines would plug with the glass beads and the glass frit slurry and what is required to unplug the lines. The flow loop consisted of vertical and horizontal runs of clear PVC piping, similar in geometry to the existing system. Two different batches of glass slurry were tested: a batch of 50 wt% spherical glass beads and a batch of 50 wt% glass frit in process water. No chemicals such as formic acid was used in slurry, only water and glass formers. The glass beads used for this testing were commercially available borosilicate glass of mesh size -100+200. The glass frit was Frit 418 obtained from …
Date:
November 24, 2008
Creator:
Adamson, D & Bradley Pickenheim, B
Object Type:
Report
System:
The UNT Digital Library
Transatlantic Regulatory Cooperation: A Possible Role for Congress
This report focuses on the creation of the Transatlantic Economic Council; the role of legislatures in the regulatory process; and the Transatlantic Legislators' Dialogue and its new role as an advisor to transatlantic regulatory efforts.
Date:
November 7, 2008
Creator:
Ahearn, Raymond J. & Morelli, Vincent
Object Type:
Report
System:
The UNT Digital Library
Accelerated Stress Testing and Diagnostic Analysis of Degradation in CdTe Solar Cells
The primary goal of this study was to ascertain the presence and types of mechanisms affecting CdS/CdTe device stability in the temperature range of 60 to 120 ..deg..C. It should be noted that the results presented were specific to cells made using the specific growth conditions described.
Date:
November 1, 2008
Creator:
Albin, D. S.
Object Type:
Article
System:
The UNT Digital Library
Whales and Sonar: Environmental Exemptions for the Navy's Mid-Frequency Active Sonar Training
This report discusses laws related to the protection of marine mammals when using mid-frequency active sonar including the Marine Mammal Protection Act (MMPA), the Endangered Species Act (ESA), the National Environmental Policy Act (NEPA), and the Coastal Zone Management Act (CZMA). The report discusses each of the laws generally, and then reviews the litigation surrounding the Navy's compliance with these laws in the context of using the sonar for training purposes off California's coast.
Date:
November 14, 2008
Creator:
Alexander, Kristina
Object Type:
Report
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 26, No. 45, Ed. 1 Thursday, November 6, 2008
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
November 6, 2008
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 26, No. 46, Ed. 1 Thursday, November 13, 2008
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
November 13, 2008
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 26, No. 47, Ed. 1 Thursday, November 20, 2008
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
November 20, 2008
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 26, No. 48, Ed. 1 Thursday, November 27, 2008
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
November 27, 2008
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Examining Technology, Structure and Identity During an Enterprise System Implementation
This paper presents a longitudinal study of an Enterprise System (ES) implementation by critically examining the discursive context in which an ES implementation unfolds. The findings show that users strongly supported the ES in the earlier stage of implementation when the technology was an imaginary phenomenon. However, in later stages, when the technology is in use, user support was not consistent. In this phase the ES produces loss of control and an inability to function as an arbiter of fairness (in allocating resources associated with the system) thereby directly challenging existing professional identities and roles. These outcomes, in turn, generate acts of resistance on the part of workers. Users reach inside the technology and reshape it by devising creative workarounds that produce a sense of reskilling to counter the deskilling produced by the loss of control and power. The analysis also shows that an ES is a complex social phenomenon that is intricately linked to and complicit in shaping organizational structure and identity. In particular this study shows how technology, structure, and identity are in a mutually constitutive relationship.
Date:
November 12, 2008
Creator:
Alvarez, Rosio
Object Type:
Article
System:
The UNT Digital Library
Enforcement of Congressional Rules of Conduct: An Historical Overview
This report describes the evolution of congressional enforcement of congressional rules of conduct and summarizes the disciplinary action taken by the House Committee on Standards of Official Conduct and the Senate Select Committee on Ethics. It also discusses the recommendations of the House Special Task Force on Ethics and related proposals as well as selected other recent changes.
Date:
November 18, 2008
Creator:
Amer, Mildred
Object Type:
Report
System:
The UNT Digital Library
House Committee on Standards of Official Conduct: A Brief History of Its Evolution and Jurisdiction. November 2008
This report provides a history of the creation and evolution of the House Committee on Standards of Official Conduct.
Date:
November 25, 2008
Creator:
Amer, Mildred
Object Type:
Report
System:
The UNT Digital Library
Women in the United States Congress: 1917-2008
None
Date:
November 26, 2008
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
Southwest Retort, Volume 61, Number 3, November 2008
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
November 2008
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Doctoral Recital: 2008-11-23 – George Amorim, double bass
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
November 23, 2008
Creator:
Amorim, George
Object Type:
Sound
System:
The UNT Digital Library
Exact solution of the envelope equations for a matchedquadrupole-focused beam in the zero space-charge limit
The Kapchinskij-Vladimirskij equations are widely used to study the evolution of the beam envelopes in a periodic system of quadrupole focusing cells. In this paper, we analyze the case of a matched beam. Our model is analogous to that used by Courant and Snyder [E.D. Courant and H.S. Snyder, Ann. Phys. 3, 1 (1958)] in obtaining a first-order approximate solution for a synchrotron. Here, we treat a linear machine and obtain an exact solution. The model uses a full occupancy, piecewise-constant focusing function and neglects space charge. There are solutions in an infinite number of bands as the focus strength is increased. We show that all these bands are stable. Our explicit results for the phase advance {sigma} and the envelope a(z) are exact for all phase advances except multiples of 180{sup o}, where the behavior is singular. We find that the peak envelope size is minimized at {sigma} = 90{sup o}. Actual operation in the higher bands would require very large, very accurate field strengths and would produce significantly larger envelope excursions.
Date:
November 7, 2008
Creator:
Anderson, Oscar A. & LoDestro, L. L.
Object Type:
Article
System:
The UNT Digital Library
Maximizing Residential Energy Savings: Net Zero Energy House (ZEH) Technology Pathways
To meet current U.S. Department of Energy zero-energy home performance goals, new technologies and solutions must increase whole-house efficiency savings by an additional 40% relative to those provided by best available components and systems.
Date:
November 1, 2008
Creator:
Anderson, R. & Roberts, D.
Object Type:
Report
System:
The UNT Digital Library
Developments in Oil Shale
None
Date:
November 17, 2008
Creator:
Andrews, Anthony
Object Type:
Report
System:
The UNT Digital Library
The Hutto Business Update (Hutto, Tex.), Vol. 4, No. 3, Ed. 1 Saturday, November 1, 2008
Newsletter focusing on information for and about the business community in Hutto, Texas, along with advertising.
Date:
November 1, 2008
Creator:
Arnett, Mahlon E., II
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Kaluza-Klein Dark Matter: Direct Detection vis-a-vis LHC
We explore the phenomenology of Kaluza-Klein (KK) dark matter in very general models with universal extra dimensions (UEDs), emphasizing the complementarity between high-energy colliders and dark matter direct detection experiments. In models with relatively small mass splittings between the dark matter candidate and the rest of the (colored) spectrum, the collider sensitivity is diminished, but direct detection rates are enhanced. UEDs provide a natural framework for such mass degeneracies. We consider both 5-dimensional and 6-dimensional non-minimal UED models, and discuss the detection prospects for various KK dark matter candidates: the KK photon {gamma}{sub 1} (5D) the KK Z-boson Z{sub 1} (5D) and the spinless KK photon {gamma}{sub H} (6D). We combine collider limits such as electroweak precision data and expected LHC reach, with cosmological constraints from WMAP and the sensitivity of current or planned direct detection experiments. Allowing for general mass splittings, we show that neither colliders, nor direct detection experiments by themselves can explore all of the relevant KK dark matter parameter space. Nevertheless, they probe different parameter space regions and the combination of the two types of constraints can be quite powerful. For example, in the case of {gamma}{sub 1} in 5D UEDs the relevant parameter space will …
Date:
November 1, 2008
Creator:
Arrenberg, Sebastian; Baudis, Laura; Kong, Kyoungchul; Matchev, Konstantin T. & Yoo, Jonghee
Object Type:
Article
System:
The UNT Digital Library
Four-Junction Solar Cell with 40% Target Efficiency Fabricated by Wafer Bonding and Layer Transfer: Final Technical Report, 1 January 2005 - 31 December 2007
We realized high-quality InGaP/GaAs 2-junction top cells on Ge/Si, InGaAs/InP bottom cells, direct-bond series interconnection of tandem cells, and modeling of bonded 3- and 4-junction device performance.
Date:
November 1, 2008
Creator:
Atwater, H. A.
Object Type:
Report
System:
The UNT Digital Library