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Top Quark Physics at the Tevatron

Description: The authors review the field of top-quark physics with an emphasis on experimental techniques. The role of the top quark in the Standard Model of particle physics is summarized and the basic phenomenology of top-quark production and decay is introduced. They discuss how contributions from physics beyond the Standard model could affect the top-quark properties or event samples. The many measurements made at the Fermilab Tevatron, which test the Standard model predictions or probe for direct evid… more
Date: October 1, 2010
Creator: Deliot, Frederic; /DAPNIA, Saclay & Glenzinski, Douglas A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advanced analysis methods in particle physics

Description: Each generation of high energy physics experiments is grander in scale than the previous - more powerful, more complex and more demanding in terms of data handling and analysis. The spectacular performance of the Tevatron and the beginning of operations of the Large Hadron Collider, have placed us at the threshold of a new era in particle physics. The discovery of the Higgs boson or another agent of electroweak symmetry breaking and evidence of new physics may be just around the corner. The gre… more
Date: October 1, 2010
Creator: Bhat, Pushpalatha C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutrino physics today, important issues and the future

Description: The status and the most important issues in neutrino physics will be summarized as well as how the current, pressing questions will be addressed by future experiments. Since the discovery of neutrino flavor transitions by the SuperKamiokande experiment in 1998, which demonstrates that neutrinos change and hence their clocks tick, i.e. they are not traveling at the speed of light and hence are not massless, the field of neutrino physics has made remarkable progress in untangling the nature of th… more
Date: October 1, 2010
Creator: Parke, Stephen J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Physics Beyond the Single Top Quark Observation

Description: In March 2009, the D0 Collaboration first observed the electroweak production of single top quarks at 5{sigma} significance. We measured the cross section for the combined s-channel and t-channel production modes, and set a lower limit on the CKM matrix element |V{sub tb}|. Since then, we have used the same dataset to measure the t-channel production mode independently, the combined cross section in the hadronically-decaying tau lepton final state, and the width and lifetime of the top quark, a… more
Date: October 1, 2010
Creator: Heinson, A.P. & Collaboration, for the DZero
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Discharge Physics of High Power Impulse Magnetron Sputtering

Description: High power impulse magnetron sputtering (HIPIMS) is pulsed sputtering where the peak power exceeds the time-averaged power by typically two orders of magnitude. The peak power density, averaged over the target area, can reach or exceed 107 W/m2, leading to plasma conditions that make ionization of the sputtered atoms very likely. A brief review of HIPIMS operation is given in a tutorial manner, illustrated by some original data related to the self-sputtering of niobium in argon and krypton. Emp… more
Date: October 13, 2010
Creator: Anders, Andre
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent Developments in High-Harmonic Fast Wave Physics in NSTX

Description: Understanding the interaction between ion cyclotron range of frequency (ICRF) fast waves and the fast-ions created by neutral beam injection (NBI) is critical for future devices such as ITER, which rely on a combination ICRF and NBI. Experiments in NSTX which use 30 MHz High-Harmonic Fast-Wave (HHFW) ICRF and NBI heating show a competition between electron heating via Landau damping and transit-time magnetic pumping, and radio-frequency wave acceleration of NBI generated fast ions. Understandin… more
Date: October 6, 2010
Creator: LeBlanc, B. P.; Bell, R. E.; Bonoli, P.; Harvey, R.; Heidbrink, W. W.; Hosea, J. C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pixel detectors in 3D technologies for high energy physics

Description: This paper reports on the current status of the development of International Linear Collider vertex detector pixel readout chips based on multi-tier vertically integrated electronics. Initial testing results of the VIP2a prototype are presented. The chip is the second embodiment of the prototype data-pushed readout concept developed at Fermilab. The device was fabricated in the MIT-LL 0.15 {micro}m fully depleted SOI process. The prototype is a three-tier design, featuring 30 x 30 {micro}m{sup … more
Date: October 1, 2010
Creator: Deptuch, G.; Demarteau, M.; Hoff, J.; Lipton, R.; Shenai, A.; Yarema, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Free-Space optical interconnects for cable-less readout in particle physics detectors

Description: Particle physics detectors utilize readout data links requiring a complicated network of copper wires or optical fibers. These links are both massive and costly. Upgrades to such detectors may require additional bandwidth to be provisioned with limited space available to route new cables or fibers. In contrast, free-space optical interconnects will offer cable-less readout, thereby resulting in significant reductions of material and labor. A collaborative effort between Fermilab and Vega Wave S… more
Date: October 1, 2010
Creator: Chramowicz, John; Kwan, Simon; Moretti, Tony; Sugg, Alan & Prosser, Alan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Understanding the physics of a possible non-Abelian fractional quantum hall effect state.

Description: We wish to present in this report experimental results from a one-year Senior Council Tier-1 LDRD project that focused on understanding the physics of a possible non-Abelian fractional quantum Hall effect state. We first give a general introduction to the quantum Hall effect, and then present the experimental results on the edge-state transport in a special fractional quantum Hall effect state at Landau level filling {nu} = 5/2 - a possible non-Abelian quantum Hall state. This state has been at… more
Date: October 1, 2010
Creator: Pan, Wei; Crawford, Matthew; Tallakulam, Madhu & Ross, Anthony Joseph, III
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comment on "Wall Forces Produced During ITER Disruptions" by H. R. Strauss, R. Paccagnella, and J. Breslau (PHYSICS OF PLASMAS 17, 082505 (2010)

Description: The paper by H.R. Strauss presents numerical simulations, which pretend to describe the disruption instability in ITER device. The simulations were performed with numerical code M3D, described in Ref.[7] of the paper.
Date: October 20, 2010
Creator: Zakharov, Leonid E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comment on "Wall Forces Produced During ITER Disruptions" by H. R. Strauss, R. Paccagnella, and J. Breslau (PHYSICS OF PLASMAS 17, 082505 (2010)

Description: The paper by H.R. Strauss presents numerical simulations, which pretend to describe the disruption instability in ITER device. The simulations were performed with numerical code M3D, described in Ref.[7] of the paper.
Date: October 20, 2010
Creator: Zakharov, Leonid E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Measurement of the neutron electric form factor at very large momentum transfer using polaried electrions scattering from a polarized helium-3 target

Description: Knowledge of the electric and magnetic elastic form factors of the nucleon is essential for an understanding of nucleon structure. Of the form factors, the electric form factor of the neutron has been measured over the smallest range in Q{sup 2} and with the lowest precision. Jefferson Lab experiment 02-013 used a novel new polarized {sup 3}He target to nearly double the range of momentum transfer in which the neutron form factor has been studied and to measure it with much higher precision. Po… more
Date: October 1, 2010
Creator: Kelleher, Aidan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Unfolding the fission prompt gamma-ray energy and multiplicity distribution measured by DANCE

Description: The nearly energy independence of the {gamma}-ray efficiency and multiplicity response for the DANCE array, the unusual characteristic elucidated in our early technical report (LLNL-TR-452298), gives one a unique opportunity to derive the true prompt {gamma}-ray energy and multiplicity distribution in fission from the measurement. This unfolding procedure for the experimental data will be described in details and examples will be given to demonstrate the feasibility of reconstruction of the tru… more
Date: October 16, 2010
Creator: Chyzh, A.; Wu, C. Y.; Bredeweg, T.; Couture, A.; Jandel, M.; Ullmann, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Regularized Approach for Solving Magnetic Differential Equations and a Revised Iterative Equilibrium Algorithm

Description: A method for approximately solving magnetic differential equations is described. The approach is to include a small diffusion term to the equation, which regularizes the linear operator to be inverted. The extra term allows a "source-correction" term to be defned, which is generally required in order to satisfy the solvability conditions. The approach is described in the context of computing the pressure and parallel currents in the iterative approach for computing magnetohydrodynamic equilibri… more
Date: October 13, 2010
Creator: Hudson, S. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analyzing Ever Growing Datasets in PHENIX

Description: After 10 years of running, the PHENIX experiment has by now accumulated more than 700 TB of reconstructed data which are directly used for analysis. Analyzing these amounts of data efficiently requires a coordinated approach. Beginning in 2005 we started to develop a system for the RHIC Atlas Computing Facility (RACF) which allows the efficient analysis of these large data sets. The Analysis Taxi is now the tool which allows any collaborator to process any data set taken since 2003 in weekly pa… more
Date: October 18, 2010
Creator: Pinkenburg, C. & Collaboration, PHENIX
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Study of the neutron damage on electronics at the National Ignition Facility

Description: The NIF environment is very complex leading to a large and non trivial radiation background. A shield surrounding the electronics is required to lower the neutron background to less than 1e7 n/cm{sup 2}. Moving electronics to behind the 6 foot-thick target bay wall is the best shield.
Date: October 28, 2010
Creator: Dauffy, L S; Mcnaney, J M & Khater, H Y
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Low-mass fission detector for the fission neutron spectrum measurement

Description: For the fission neutron spectrum measurement, the neutron energy is determined in a time-of-flight experiment by the time difference between the fission event and detection of the neutron. Therefore, the neutron energy resolution is directly determined by the time resolution of both neutron and fission detectors. For the fission detection, the detector needs not only a good timing response but also the tolerance of radiation damage and high {alpha}-decay rate. A parallel-plate avalanche counter… more
Date: October 20, 2010
Creator: Wu, C Y; Henderson, R; Gostic, J; Haight, R C & Lee, H Y
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluated Nuclear Data

Description: This chapter describes the current status of evaluated nuclear data for nuclear technology applications. We start with evaluation procedures for neutron-induced reactions focusing on incident energies from the thermal energy up to 20 MeV, though higher energies are also mentioned. This is followed by examining the status of evaluated neutron data for actinides that play dominant role in most of the applications, followed by coolants/moderators, structural materials and fission products. We then… more
Date: October 1, 2010
Creator: Oblozinsky, P.; Oblozinsky, P.; Herman, M. & Mughabghab, S. F.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Observation of single top-quark production with the CDF II experiment

Description: We present the observation of electroweak single top-quark production using up to 3.2 fb{sup -1} of data collected by the CDF experiment. Lepton plus jets candidate events are classified by four parallel analysis techniques: one likelihood discriminant, one matrix-element discriminant, one decision-tree discriminant, and one neural-network discriminant. These outputs are combined with a super discriminant based on a neural-network analysis in order to improve the expected sensitivity. In conjun… more
Date: October 1, 2010
Creator: Lueck, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laboratory constraints on chameleon dark energy and power-law fields

Description: We report results from the GammeV Chameleon Afterglow Search - a search for chameleon particles created via photon/chameleon oscillations within a magnetic field. This experiment is sensitive to a wide class of chameleon power-law models and dark energy models not previously explored. These results exclude five orders of magnitude in the coupling of chameleons to photons covering a range of four orders of magnitude in chameleon effective mass and, for individual chameleon models, exclude betwee… more
Date: October 1, 2010
Creator: Steffen, Jason H.; Upadhye, Amol; Baumbaugh, Al; Chou, Aaron S.; Mazur, Peter O.; Tomlin, Ray et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A low-threshold analysis of CDMS shallow-site data

Description: Data taken during the final shallow-site run of the first tower of the Cryogenic Dark Matter Search (CDMS II) detectors have been reanalyzed with improved sensitivity to small energy depositions. Four {approx}224 g germanium and two {approx}105 g silicon detectors were operated at the Stanford Underground Facility (SUF) between December 2001 and June 2002, yielding 118 live days of raw exposure. Three of the germanium and both silicon detectors were analyzed with a new low-threshold technique, … more
Date: October 1, 2010
Creator: Akerib, D. S.; Attisha, M. J.; Baudis, L.; Bauer, D. A.; Bolozdynya, A. I.; Brink, P. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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