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35 Matching Results
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Dalitz Plot Analysis of the Charmless Three Body Decay B+- to K+- K+- K-+ Utilising Data Recorded by the BaBar Experiment
None
Date:
May 13, 2013
Creator:
Barrett, Matthew
System:
The UNT Digital Library
Observation of Temperature-Induced Crossover to an Orbital-Selective Mott Phase in AxFe2-ySe2 (A=K, Rb) Superconductors
None
Date:
March 13, 2013
Creator:
Yi, M.; Lu, D. H.; Yu, R.; Riggs, S. C.; Chu, J. H.; Lv, B. et al.
System:
The UNT Digital Library
Measurement of an Excess in Bbar to D(*) tau- nubar Decays and Implications for Charged Higgs Bosons
None
Date:
March 13, 2013
Creator:
Lees, J. P.; Poireau, V.; Tisserand, V.; /Annecy, LAPP; Grauges, E.; /Barcelona U., ECM et al.
System:
The UNT Digital Library
Hexagon Functions and the Three-loop Remainder Function
None
Date:
August 13, 2013
Creator:
Dixon, Lance J.; Drummond, James M.; von Hippel, Matt & Pennington, Jeffrey
System:
The UNT Digital Library
Application of the Principle of Maximum Conformality to Top-Pair Production
A major contribution to the uncertainty of finite-order perturbative QCD predictions is the perceived ambiguity in setting the renormalization scale {mu}{sub r}. For example, by using the conventional way of setting {mu}{sub r} {element_of} [m{sub t}/2, 2m{sub t}], one obtains the total t{bar t} production cross-section {sigma}{sub t{bar t}} with the uncertainty {Delta}{sigma}{sub t{bar t}}/{sigma}{sub t{bar t}} {approx} (+3%/-4%) at the Tevatron and LHC even for the present NNLO level. The Principle of Maximum Conformality (PMC) eliminates the renormalization scale ambiguity in precision tests of Abelian QED and non-Abelian QCD theories. By using the PMC, all nonconformal {l_brace}{beta}{sub i}{r_brace}-terms in the perturbative expansion series are summed into the running coupling constant, and the resulting scale-fixed predictions are independent of the renormalization scheme. The correct scale-displacement between the arguments of different renormalization schemes is automatically set, and the number of active flavors n{sub f} in the {l_brace}{beta}{sub i}{r_brace}-function is correctly determined. The PMC is consistent with the renormalization group property that a physical result is independent of the renormalization scheme and the choice of the initial renormalization scale {mu}{sub r}{sup init}. The PMC scale {mu}{sub r}{sup PMC} is unambiguous at finite order. Any residual dependence on {mu}{sub r}{sup init} for a …
Date:
May 13, 2013
Creator:
Brodsky, Stanley J.; Wu, Xing-Gang & Dept of Physics, Chongqing University, China
System:
The UNT Digital Library
A Simple Radionuclide-Driven Single-Ion Source
None
Date:
June 13, 2013
Creator:
Montero Diez, M.; Twelker, K.; Fairbank, W., Jr.; Gratta, G.; Barbeau, P. S.; Barry, K. et al.
System:
The UNT Digital Library
Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407 Cygni
None
Date:
June 13, 2013
Creator:
Abdo, A. A.; Ackermann, M.; Ajello, M.; Atwood, W. B.; Baldini, L.; Ballet, J. et al.
System:
The UNT Digital Library
Search for neutral Higgs bosons in the multi-b-jet topology in 5.2fb-1 of ppbar collisions at sqrt(s)=1.96 TeV
None
Date:
June 13, 2013
Creator:
Abazov, Victor Mukhamedovich; Abbott, Braden Keim; Acharya, Bannanje Sripath; Adams, Mark Raymond; Adams, Todd; Alexeev, Guennadi D. et al.
System:
The UNT Digital Library
Intense Terahertz Pulses from SLAC Electron Beams using Coherent Transition Radiation
None
Date:
March 13, 2013
Creator:
Wu, Ziran; Fisher, Alan S.; Goodfellow, John; Fuchs, Matthias; Daranciang, Dan; Hogan, Mark et al.
System:
The UNT Digital Library
Characterization of a high-temperature superconducting conductor on round core cables in magnetic fields up to 20 T
The next generation of high-ï¬eld magnets that will operate at magnetic ï¬elds substantially above 20 T, or at temperatures substantially above 4.2 K, requires high-temperature superconductors (HTS). Conductor on round core (CORC) cables, in which RE-Ba{sub 2}Cu{sub 3}O{sub 7-{delta}} (RE = rare earth) (REBCO) coated conductors are wound in a helical fashion on a flexible core, are a practical and versatile HTS cable option for low-inductance, high-field magnets. We performed the first tests of CORC magnet cables in liquid helium in magnetic fields of up to 20 T. A record critical current I{sub c} of 5021 A was measured at 4.2 K and 19 T. In a cable with an outer diameter of 7.5 mm, this value corresponds to an engineering current density J{sub e} of 114 A mm{sup -2} , the highest J{sub e} ever reported for a superconducting cable at such high magnetic fields. Additionally, the first magnet wound from an HTS cable was constructed from a 6 m-long CORC cable. The 12-turn, double-layer magnet had an inner diameter of 9 cm and was tested in a magnetic field of 20 T, at which it had an I{sub c} of 1966 A. The cables were quenched repetitively without …
Date:
February 13, 2013
Creator:
van der Laan, Danko; Noyes, Patrick; Miller, George; Weijers, Hubertus & Willering, Gerard
System:
The UNT Digital Library
Hi Power S-band Window Optimized to Minimize Surface Electric and Magnetic Fields
None
Date:
May 13, 2013
Creator:
Yeremian, A.D.; Dolgashev, V.A. & Tantawi, S.G.
System:
The UNT Digital Library
Design Concepts for the Cherenkov Telescope Array
None
Date:
June 13, 2013
Creator:
Actis, M.; Agnetta, G.; Aharonian, F.; Akhperjanian, A.; Aleksic, J.; Aliu, E. et al.
System:
The UNT Digital Library
Applicability of Nonproliferation Tools and Concepts to Future Arms Control
None
Date:
May 13, 2013
Creator:
Dreicer, M & Stein, G
System:
The UNT Digital Library
Solving the Cusp-Core Problem with a Novel Scalar Field Dark Matter
None
Date:
June 13, 2013
Creator:
Su, Kung-Yi; /Taiwan, Natl. Taiwan U.; Chen, Pisin & /Taiwan, Natl. Taiwan U. /SLAC /KIPAC, Menlo Park
System:
The UNT Digital Library
Primordial non-Gaussianity in the Bispectrum of the Halo Density Field
None
Date:
June 13, 2013
Creator:
Baldauf, Tobias; Seljak, Uros & Senatore, Leonardo
System:
The UNT Digital Library
Results on Charmonium(-like) and Bottomonium(-like) States from Belle and BaBar
None
Date:
June 13, 2013
Creator:
Lange, Jens Soren & U., /Giessen
System:
The UNT Digital Library
Consequences of the BaBar e^+e^- \to pi^+pi^- Measurement for the Determination of Model-Dependent rho-omega Mixing Effects in Pi_{pw}(m_p^2) and (g-2)_mu
None
Date:
June 13, 2013
Creator:
Wolfe, C. E. & Maltman, K.
System:
The UNT Digital Library
Measurement of Separate Cosmic-Ray Electron And Positron Spectra with the Fermi Large Area Telescope
None
Date:
May 13, 2013
Creator:
Ackermann, M.; Ajello, M.; Allafort, A.; Baldini, L.; Barbiellini, G.; Bastieri, D. et al.
System:
The UNT Digital Library
Pulsed Depressed Collector for High-Efficiency RF Systems
None
Date:
March 13, 2013
Creator:
Kemp, Mark A.; Jensen, Aaron & Neilson, Jeff
System:
The UNT Digital Library
Constraints on the Cosmic-Ray Density Gradient Beyond the Solar Circle From Fermi Gamma-Ray Observations of the Third Galactic Quadrant
We repot an analysis of the interstellar ϒ-ray emission in the third Galactic quadrant measured by he Fermi Large Area Telescope. The window encompassing the Galactic plane from longitude 210° to 250° has kinematically well-defined segments of the Local and the Perseus arms, suitable to study the cosmic-ray densities across the outer Galaxy. We measure no large gradient with Galactocentric distance of the ϒ-ray eissivitties per interstellar H atom over the regions sampled in this study. The gradient depends, however, on the optical depth correction applied to derive the H1 column densities. No significant variations are found in the interstellar spectra in the outer Galaxy, indicating similar shapes of the cosmic-ray spectrum up to the Perseus arm for particles with GeV to tens of GeV energies. The emissivity as a function of Galactocentric radius does not show a large enhancement in the spiral arms with respect to the interarm region. The measured emissivity gradient is flatter that expectations based on a cosmic-ray propagation model using the radial distribution of supernova remnants and uniform diffusion properties. In this context, observations require a larger halo size and/or a flatter CR source distribution than usually assumed. The molecular mass calibrating ratio, X$sub CO$ …
Date:
June 13, 2013
Creator:
Ackermann, M.; Ajello, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D. et al.
System:
The UNT Digital Library
3D Pixels: Recent Results
None
Date:
June 13, 2013
Creator:
Rohne, O.; Bolle, E.; Borri, M.; Boscardin, M.; Dalla Betta, G. F.; Darbo, G. et al.
System:
The UNT Digital Library
Fermi Large Area Telescope Observation of a Gamma-Ray Source at the Position of Eta Carinae
None
Date:
June 13, 2013
Creator:
Abdo, A. A.; Ackermann, M.; Ajello, M.; Allafort, A.; Baldini, L.; Ballet, J. et al.
System:
The UNT Digital Library
Electrodeposition of Oriented Cerium Oxide Films
This article discusses the process of depositing CeO₂ with a preferred crystalline orientation.
Date:
September 13, 2013
Creator:
Wang, Adele Qi & Golden, Teresa
System:
The UNT Digital Library
Overcoming Extreme-Scale Reproducibility Challenges Through a Unified, Targeted and Multilevel Toolset
None
Date:
August 13, 2013
Creator:
Ahn, D H; Lee, G L; Gopalakrishnan, G; Rakamaric, Z; Schulz, M & Laguna, I
System:
The UNT Digital Library