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The energy dependence of the total charm cross section

Description: We discuss the energy dependence of the total charm cross section and some of its theoretical uncertainties including the quark mass, scale choice and the parton densities. We compare the next-to-leading order calculation of the total cross section with results obtained using PYTHIA.
Date: October 18, 2007
Creator: Vogt, R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comparisons of the MINOS Near and Far Detector Readout Systems at a Test Beam

Description: MINOS is a long baseline neutrino oscillation experiment that uses two detectors separated by 734 km. The readout systems used for the two detectors are different and have to be independently calibrated. To verify and make a direct comparison of the calibrated response of the two readout systems, test beam data were acquired using a smaller calibration detector. This detector was simultaneously instrumented with both readout systems and exposed to the CERN PS T7 test beam. Differences in the ca… more
Date: February 1, 2009
Creator: Cabrera, A.; U., /Oxford; Adamson, P.; London, /University Coll.; Barker, M.; U., /Oxford et al.
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Partner: UNT Libraries Government Documents Department
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Control of Laser Plasma Based Accelerators up to 1 GeV

Description: This dissertation documents the development of a broadband electron spectrometer (ESM) for GeV class Laser Wakefield Accelerators (LWFA), the production of high quality GeV electron beams (e-beams) for the first time in a LWFA by using a capillary discharge guide (CDG), and a statistical analysis of CDG-LWFAs. An ESM specialized for CDG-LWFAs with an unprecedented wide momentum acceptance, from 0.01 to 1.1 GeV in a single shot, has been developed. Simultaneous measurement of e-beam spectra and … more
Date: December 3, 2007
Creator: Nakamura, Kei
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Disentangling neutrino-nucleon cross section and high energy neutrino flux with a km^3 neutrino telescope

Description: The energy-zenith angular event distribution in a neutrino telescope provides a unique tool to determine at the same time the neutrino-nucleon cross section at extreme kinematical regions, and the high energy neutrino flux. By using a simple parameterization for fluxes and cross sections, we present a sensitivity analysis for the case of a km{sup 3} neutrino telescope. In particular, we consider the specific case of an under-water Mediterranean telescope placed at the NEMO site, although most o… more
Date: November 1, 2007
Creator: Borriello, E.; Cuoco, A.; Mangano, G.; Miele, G.; Pastor, S.; Pisanti, O. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy dependence of jet transport parameter and parton saturationin quark-gluon plasma

Description: We study the evolution and saturation of the gluondistribution function in the quark-gluon plasma as probed by apropagating parton and its effect on the computation of jet quenching ortransport parameter $\hat q $. For thermal partons, the saturation scale$Q2_s$ is found to be proportional to the Debye screening mass $\mu_D2$.For hard probes, evolution at small $x=Q2_s/6ET$ leads to jet energydependence of hat q. We study this dependence for both a conformal gaugetheory in weak and strong coupl… more
Date: June 24, 2007
Creator: Casalderrey-Solana, Jorge & Wang, Xin-Nian
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Heavy Quark Production at the Tevatron

Description: Results are presented from four CDF analyses involving heavy quark production in proton-antiproton collisions at center of mass energy 1.96 TeV. The shapes of b-jets are found to be broader than inclusive predictions and broader than both PYTHIA and HERWIG defaults. A measurement of the production cross section for {psi}(2S) is consistent with Run 1 results and with theoretical predictions associated with parton distribution function energy dependence. The inclusive b-jet production cross secti… more
Date: August 1, 2008
Creator: Seidel, Sally
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Renewable Energy Development on Fort Mojave Reservation Feasiblity Study

Description: The Ft. Mojave tribe, whose reservation is located along the Colorado River in the states of Arizona, California, and Nevada near the point where all three states meet, has a need for increased energy supplies. This need is a direct result of the aggressive and successful economic development projects undertaken by the tribe in the last decade. While it is possible to contract for additional energy supplies from fossil fuel sources it was the desire of the tribal power company, AHA MACAV Power … more
Date: March 17, 2008
Creator: Russell Gum, ERCC analytics LLC
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Energy dependence of pi, p and pbar transverse momentum spectra for Au+Au collisions at sqrt sNN = 62.4 and 200 GeV

Description: We study the energy dependence of the transverse momentum (pT) spectra for charged pions, protons and anti-protons for Au+Au collisions at sqrt sNN = 62.4 and 200 GeV. Data are presented at mid-rapidity (lbar y rbar< 0.5) for 0.2< pT< 12 GeV/c. In the intermediate pT region (2< pT< 6 GeV/c), the nuclear modification factor is higher at 62.4 GeV than at 200 GeV, while at higher pT (pT> 7 GeV/c) the modification is similar for both energies. The p/pi+ and pbar/pi- ratios for cen… more
Date: March 26, 2007
Creator: Ritter, H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Remark On: The Neutron Spherical Optical-Model Absorption.

Description: The energy-dependent behavior of the absorption term of the spherical neutron optical potential for doubly magic {sup 208}Pb and the neighboring {sup 209}Bi is examined. These considerations suggest a phenomenological model that results in an intuitively attractive energy dependence of the imaginary potential that provides a good description of the observed neutron cross sections and that is qualitatively consistent with theoretical concepts. At the same time it provides an alternative to some … more
Date: June 30, 2007
Creator: Smith, A. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Extracting longitudinal shower development information from crystal calorimetry plus tracking

Description: We present an approach to derive longitudinal shower development information from the longitudinally unsegmented BABAR electromagnetic calorimeter by using tracking information. Our algorithm takes advantage of the good three-dimensional tracking resolution of BABAR, which provides an independent geometric constraint on the shower as measured in the BABAR crystal calorimeter. We show that adding the derived longitudinal shower development information to standard particle identification algorith… more
Date: November 1, 2007
Creator: Brown, David; Brown, D.N.; Ilic, J. & Mohanty, G.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A systematic study of J/psi suppression in cold nuclear matter

Description: Understanding the effects of cold nuclear matter on J/psi production is a key requirement in order to interpret the J/psi suppression reported in heavy-ion collisions. Based on a Glauber model, the J/psi-nucleon inelastic cross section is determined from a statistical analysis of J/psi world data on nuclear targets. The global fit of all data gives sigmaJ/psiN = 3.4 +/- 0.2 mb, significantly smaller than previous estimates, yet the chi2 of the fit is pretty large, chi2/ndf = 1.5. A similar valu… more
Date: April 5, 2008
Creator: Arleo, Francois & Tram, Vi-Nham
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proton reaction cross sections measured in the BNL/AGS E943 experiment

Description: We have measured proton reaction cross sections over a wide mass and energy range at the Brookhaven AGS accelerator. The samples were elemental Be, C, Al, Cu, W, and Pb; the measurements were carried out at ten incident proton kinetic energies in the range 0.54 to 7.8 GeV. The experiment was similar to an earlier experiment in the 200-550 MeV range by Renberg et al. The new results are in good agreement with those of Renberg et al. at the overlap point near 550 MeV. The combined results of the … more
Date: November 28, 2000
Creator: Dietrich, F S; Hartouni, E P; Schmid, G J; Soltz, R; Abfalterer, W P; Haight, R C et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Particle Correlations with the PHENIX Experiment

Description: Results of identical pion correlations from the first year of data collection with the PHENIX detector at RHIC ({radical}S{sub NN} = 130 GeV) are presented. PHENIX has good particle identification using an electromagnetic calorimeter for timing, leading to identified pions from .2 to 1 GeV/c. This extends the range of previously measured correlation radii at this energy to (k{sub T}) = 633MeV/c. The beam energy dependence of the HBT radii are studied in depth and no significant dependence of th… more
Date: January 20, 2002
Creator: Johnson, S C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy dependence of transverse momentum fluctuations in Pb+Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV

Description: Results are presented on event-by-event fluctuations of transverse momenta p{sub T} in central Pb+Pb interactions at 20A, 30A, 40A, 80A, and 158A GeV. The analysis was performed for charged particles at forward center-of-mass rapidity (1.1 < y*{sub {pi}} < 2.6). Three fluctuation measures were studied: the distribution of average transverse momentum M(p{sub T}) in the event, the {phi}{sub p{sub T}} fluctuation measure, and two-particle transverse momentum correlations. Fluctuations of p{s… more
Date: April 15, 2009
Creator: Collaboration, NA49 & Anticic, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutrino and antineutrino inclusive charged-current cross section measurement with the MINOS near detector

Description: This thesis presents the measurement of energy dependence of the neutrino-nucleon inclusive charged current cross section on an isoscalar target in the range 3-50 GeV for neutrinos and 5-50 GeV energy range for antineutrinos. The data set was collected with the MINOS Near Detector using the wide band NuMI beam at Fermilab. The size of the charged current sample is 1.94 x 10{sup 6} neutrino events and 1.60 x 10{sup 5} antineutrino events. The flux has been extracted using a low hadronic energy s… more
Date: March 1, 2009
Creator: Bhattacharya, Debdatta & U., /Pittsburgh
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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System size, energy and centrality dependence of strange hadron elliptic flow at STAR

Description: The elliptic flow (v{sub 2}) pattern in terms of hadron mass and transverse momentum p{sub T} is qualitatively described for p{sub T} < 2 GeV/c by ideal hydrodynamics in Au + Au collisions at RHIC. In addition, for p{sub T} = 2-6 GeV/c the measured v{sub 2} follow a universal scaling by the number of quarks explained by quark coalescence/recombination models. These observations suggest that a partonic collectivity develops in the matter in early stage of heavy ion collisions. Centrality as w… more
Date: December 21, 2008
Creator: Masui, Hiroshi
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Determination of the strong coupling constant from the inclusive jet cross section in ppbar collisions at sqrt(s)=1.96 TeV

Description: We determine the strong coupling constant {alpha}{sub s} and its energy dependence from the p{sub T} dependence of the inclusive jet cross section in p{bar p} collisions at {radical}s = 1.96 TeV. The strong coupling constant is determined over the transverse momentum range 50 < p{sub T} < 145 GeV. Using perturbative QCD calculations to order {Omicron}({alpha}{sub s}{sup 3}) combined with {Omicron}({alpha}{sub s}{sup 4}) contributions from threshold corrections, we obtain {alpha}{sub s}(M{… more
Date: November 1, 2009
Creator: Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Bremstrahlung versus Monoenergetic Photons for Photonuclear Inspection Applications

Description: Bremsstrahlung sources have been utilized for various non-intrusive inspection or interrogation applications for over 100 years - with the primary focus being radiographic imaging. In the last several decades, it has become evident that photons of energy greater than 6 MeV can also provide useful photonuclear information that can extend the capabilities and information available from active inspections. These energetic inspection photons can be produced as a continuum of energies (i.e., bremsst… more
Date: June 1, 2008
Creator: Jones, Dr. James L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Public views on multiple dimensions of security : nuclear waepons, terrorism, energy, and the environment : 2007.

Description: We analyze and compare findings from identical national surveys of the US general public on nuclear security and terrorism administered by telephone and Internet in mid-2007. Key areas of investigation include assessments of threats to US security; valuations of US nuclear weapons and nuclear deterrence; perspectives on nuclear proliferation, including the specific cases of North Korea and Iran; and support for investments in nuclear weapons capabilities. Our analysis of public views on terrori… more
Date: January 1, 2008
Creator: Herron, Kerry Gale (University of Oklahoma, Norman, OK) & Jenkins-Smith, Hank C. (University of Oklahoma, Norman, OK)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lac du Flambeau Band of Lake Superior Chippewa Indians Strategic Energy Plan

Description: This plan discusses the current energy use on the Lac du Flambeau Reservation, the current status of the Tribe's energy program, as well as the issues and concerns with energy on the reservation. This plan also identifies and outlines energy opportunities, goals, and objectives for the Tribe to accomplish. The overall goal of this plan is to address the energy situation of the reservation in a holistic manner for the maximum benefit to the Tribe. This plan is an evolving document that will be r… more
Date: November 16, 2009
Creator: Hoover, Bryan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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X-Ray Emission Cross Sections following Charge Exchange by Multiply-Charged Ions of Astrophysical Interest

Description: State selective nl-electron capture cross sections are presented for highly charged ions with Z = 6-10 colliding with atoms and molecules. The energy range investigated was from 1 eV/amu (v = 0.006 a.u.) to 100 keV/amu (v =2.0 a.u.). The energy dependence of the l-level populations is investigated. The K-shell x-ray emission cross sections are determined by using the calculated state-selective electron capture results as input and then applying hydrogenic branching and cascading values for the … more
Date: September 19, 2005
Creator: Otranto, S; Olson, R E & Beiersdorfer, P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Xi0 and anti-Xi0 Polarization Measurements at 800-GeV/c

Description: The polarization of {Xi}{sup 0} and {bar {Xi}}{sup 0} hyperons produced by 800 GeV/c protons on a BeO target at a fixed targeting angle of 4.8 mrad is measured by the KTeV experiment at Fermilab. The result of 9.7% for {Xi}{sup 0} polarization shows no significant energy dependence when compared to a result obtained at 400 GeV/c production energy and at twice the targeting angle. The polarization of the {Xi}{sup 0} is measured for the first time and found to be consistent with zero. They also e… more
Date: August 1, 2006
Creator: Abouzaid, E.; Alavi-Harati, A.; Alexopoulos, T.; Arenton, M.; Barker, A. R.; Bellantoni, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of Fundamental NIST Sphere Experiments Related to Criticality Safety

Description: A series of neutron transport experiments was performed in 1989 and 1990 at NIST (National Institute of Standards and Technology) using a spherical stainless steel container and fission chambers. These experiments were performed to help understand errors observed in criticality calculations for arrays of individually subcritical components, particularly solution arrays [1-3]. They were supported by the U.S. Department of Energy, Environment and Health, Nuclear Criticality Technology and Safety … more
Date: June 1, 2007
Creator: Kim, Soon S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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