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$A^t_{FB}$ Meets LHC
The recent Tevatron measurement of the forward-backward asymmetry of the top quark shows an intriguing discrepancy with Standard Model expectations, particularly at large t{bar t} invariant masses. Measurements of this quantity are subtle at the LHC, due to its pp initial state, however, one can define a forward-central-charge asymmetry which captures the physics. We study the capability of the LHC to measure this asymmetry and find that within the SM a measurement at the 5{sigma} level is possible with roughly 60 fb{sup -1} at {radical}s = 14 TeV. If nature realizes a model which enhances the asymmetry (as is necessary to explain the Tevatron measurements), a significant difference from zero can be observed much earlier, perhaps even during early LHC running at {radical}s = 7 TeV. We further explore the capabilities of the 7 TeV LHC to discover resonances or contact interactions which modify the t{bar t} invariant mass distribution using recent boosted top tagging techniques. We find that TeV-scale color octet resonances can be discovered, even with small coupling strengths and that contact interactions can be probed at scales exceeding 6 TeV. Overall, the LHC has good potential to clarify the situation with regards to the Tevatron forward-backward measurement.
Date:
February 14, 2012
Creator:
Hewett, JoAnne L.; /SLAC; Shelton, Jessie; U., /Yale; Spannowsky, Michael; U., /Oregon et al.
Object Type:
Article
System:
The UNT Digital Library
Three-dimensional modeling and analysis of a high energy density Kelvin-Helmholtz experiment
None
Date:
February 14, 2012
Creator:
Raman, K. S.; Hurricane, O. A.; Park, H. S.; Remington, B. A.; Robey, H. & Smalyuk, V. A.
Object Type:
Article
System:
The UNT Digital Library
U.S.-Japan Economic Relations: Significance, Prospects, and Policy Options
Japan and the United States are the two largest economic powers. Together they account for over 30% of world domestic product, for a significant portion of international trade in goods and services, and for a major portion of international investment. This economic clout makes the United States and Japan potentially powerful actors in the world economy. Economic conditions in the United States and Japan have a significant impact on the rest of the world. Furthermore, the U.S.-Japan bilateral economic relationship can influence economic conditions in other countries. More generally, other issues regarding U.S.-Japan economic relations may emerge on the agenda of the 112th Congress. U.S. and Japanese leaders have several options on how to manage their relationship, including stronger reliance on the World Trade Organization; special bilateral negotiating frameworks and agreements; or a free trade agreement.
Date:
February 14, 2012
Creator:
Cooper, William H.
Object Type:
Report
System:
The UNT Digital Library
Understanding Energy Code Acceptance within the Alaska Building Community
This document presents the technical assistance provided to the Alaska Home Financing Corporation on behalf of PNNL regarding the assessment of attitudes toward energy codes within the building community in Alaska. It includes a summary of the existing situation and specific assistance requested by AHFC, the results of a questionnaire designed for builders surveyed in a suburban area of Anchorage, interviews with a lender, a building official, and a research specialist, and recommendations for future action by AHFC.
Date:
February 14, 2012
Creator:
Mapes, Terry S.
Object Type:
Report
System:
The UNT Digital Library
The University News (Irving, Tex.), Vol. 37, No. 15, Ed. 1 Tuesday, February 14, 2012
Weekly student newspaper from the University of Dallas in Irving, Texas that includes campus news and commentaries along with advertising.
Date:
February 14, 2012
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
[29th annual "Black Music and the Civil Rights Movement Concert" rehearsal tape 1 of 2]
Video recording from The Black Academy of Arts and Letters recorded during rehearsal for the 29th annual "Black Music and the Civil Rights Movement Concert" held on January 14th, 2012 for the annual concert event to be held on January 15th. The footage shows rehearsal for the choir, band, dancers, and featured vocalist Cece Winans taking place at the Meyerson Symphony Center overseen by producer Curtis King.
Date:
January 14, 2012
Creator:
King, Curtis
Object Type:
Video
System:
The UNT Digital Library
[29th annual "Black Music and the Civil Rights Movement Concert" rehearsal tape 2 of 2]
Video recording from The Black Academy of Arts and Letters recorded during rehearsal for the 29th annual "Black Music and the Civil Rights Movement Concert" held on January 14th, 2012 for the annual concert event to be held on January 15th. The footage shows rehearsal for the choir, band, dancers, and featured vocalist Cece Winans taking place at the Meyerson Symphony Center overseen by producer Curtis King.
Date:
January 14, 2012
Creator:
King, Curtis
Object Type:
Video
System:
The UNT Digital Library
Computational and Experimental Design of Fe-Based Superalloys for Elevated-Temperature Applications
Analogous to nickel-based superalloys, Fe-based superalloys, which are strengthened by coherent B2- type precipitates are proposed for elevated-temperature applications. During the period of this project, a series of ferritic superalloys have been designed and fabricated by methods of vacuum-arc melting and vacuum-induction melting. Nano-scale precipitates were characterized by atom-probe tomography, ultrasmall- angle X-ray scattering, and transmission-electron microscopy. A duplex distribution of precipitates was found. It seems that ferritic superalloys are susceptible to brittle fracture. Systematic endeavors have been devoted to understanding and resolving the problem. Factors, such as hot rolling, precipitate volume fractions, alloy compositions, precipitate sizes and inter-particle spacings, and hyperfine cooling precipitates, have been investigated. In order to understand the underlying relationship between the microstructure and creep behavior of ferric alloys at elevated temperatures, in-situ neutron studies have been carried out. Based on the current result, it seems that the major role of βΠwith a 16%-volume fraction in strengthening ferritic alloys is not load sharing but interactions with dislocations. The oxidation behavior of one ferritic alloy, FBB8 (Fe-6.5Al-10Ni-10Cr-3.4Mo-0.25Zr-0.005B, weight percent), was studied in dry air. It is found that it possesses superior oxidation resistance at 1,023 and 1,123 K, compared with other creep-resistant ferritic steels [T91 (modified …
Date:
January 14, 2012
Creator:
Liaw, Peter K.; Fine, Morris E.; Ghosh, Gautam; Asta, Mark D.; Liu, Chain T.; Sun, Zhiqian et al.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Saturday, January 14, 2012
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 14, 2012
Creator:
DeSilver, Debi
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The SAR Color Guard presented a Flag Certificate to the Five Star Ford Company in Plano, Texas: January 14, 2012
Webpage from McKinney TXSSAR website containing photographs from a Flag Certificate presentation on January 14, 2012.
Date:
January 14, 2012
Creator:
Texas Society Sons of the American Revolution, McKinney Chapter 63
Object Type:
Website
System:
The UNT Digital Library
The SAR Color Guard presented the colors at the Plano City Council during the Martin Luther King day celebration: January 14, 2012
Webpage from McKinney TXSSAR website containing photographs from a Martin Luther King day celebration on January 14, 2012.
Date:
January 14, 2012
Creator:
Texas Society Sons of the American Revolution, McKinney Chapter 63
Object Type:
Website
System:
The UNT Digital Library
Theoretical Studies on the Electronic Structures and Properties of Complex Ceramic Crystals and Novel Materials
This project is a continuation of a long program supported by the Office of Basic Energy Science in the Office of Science of DOE for many years. The final three-year continuation started on November 1, 2005 with additional 1 year extension to October 30, 2009. The project was then granted a two-year No Cost Extension which officially ended on October 30, 2011. This report covers the activities within this six year period with emphasis on the work completed within the last 3 years. A total of 44 papers with acknowledgement to this grant were published or submitted. The overall objectives of this project are as follows. These objectives have been evolved over the six year period: (1) To use the state-of-the-art computational methods to investigate the electronic structures of complex ceramics and other novel crystals. (2) To further investigate the defects, surfaces/interfaces and microstructures in complex materials using large scale modeling. (3) To extend the study on ceramic materials to more complex bioceramic crystals. (4) To initiate the study on soft condensed matters including water and biomolecules. (5) To focus on the spectroscopic studies of different materials especially on the ELNES and XANES spectral calculations and their applications related to …
Date:
January 14, 2012
Creator:
Ching, Wai-Yim
Object Type:
Text
System:
The UNT Digital Library