Recent Submissions

  • QUANTUM GRAVITY, DYNAMICAL ENERGY-MOMENTUM SPACE AND VACUUM ENERGY 

    Chang, LN; Minic, D; Takeuchi, T (World Scientific Publ Co Pte Ltd, 2010-11-01)
  • An evaluation of the analytic continuation by duality technique 

    Takeuchi, T; Goonetileke, LC; Ignjatovic, SR; Wijewardhana, LCR
    In Nucl. Phys. B391 (1993) 127, the value of the oblique correction parameter S for walking technicolor theories was estimated using a technique called Analytic Continuation by Duality (ACD). We apply the ACD technique to ...
  • Precision Tests of Electroweak Physics 

    Takeuchi, T; Loinaz, W; Grant, AK
    We review the current status of precision electroweak measurements and the constraints they impose on new physics. We perform a model independent analysis using the STU-formalism of Ref. 1, and then discuss how the Z-pole ...
  • Charge assignments in multiple-U(1) gauge theories 

    Loinaz, W; Takeuchi, T (American Physical Soc, 1999-12-01)
  • Classical Implications of the Minimal Length Uncertainty Relation 

    Benczik, S; Chang, LN; Minic, D; Okamura, N; Rayyan, S; Takeuchi, T
    We study the phenomenological implications of the classical limit of the "stringy" commutation relations [x_i,p_j]=i hbar[(1+beta p^2) delta_{ij} + beta' p_i p_j]. In particular, we investigate the "deformation" of Kepler's ...
  • A Water Maser Flare in W49N: Amplification by a Rotating Foreground Cloud 

    Boboltz, D. A.; Simonetti, J. H.; Dennison, B.; Diamond, P. J.; Uphoff, J. A. (IOP PUBLISHING LTD, 1998-12)
    We monitored the 22 GHz H2O maser emission toward W49N from December 1989 through May 1990. During this period we observed an outburst in a component at -66.25 km s(-1). The flux density of the flaring component increased ...
  • The Contribution Of Galactic Free-Free Emission to Anisotropies in the Cosmic Microwave Background Found by the Saskatoon Experiment 

    Simonetti, J. H.; Dennison, B.; Topasna, G. A. (IOP PUBLISHING LTD, 1996-02)
    We made a sensitive, wide-field Ha image of the north celestial polar region. Using this image, we constrain the contribution of irregularities in interstellar free-free emission to the degree-scale anisotropies in the ...
  • 14-year program monitoring the flux densities of 33 radio sources at low frequencies 

    Salgado, J. F.; Altschuler, D. R.; Ghosh, T.; Dennison, B. K.; Mitchell, K. J.; Payne, H. E. (IOP PUBLISHING LTD, 1999-01)
    We present the results of a low-frequency flux density monitoring program of 33 extragalactic radio sources. The light curves at 318 and 430 MHz over a 14 yr period are presented. The measurements were made with the NAIC ...
  • Detection in Hα of a Supershell Associated with W4 

    Dennison, B.; Topasna, G. A.; Simonetti, J. H. (IOP PUBLISHING LTD, 1997-01)
    From H I observations, Normandeau, Taylor, & Dewdney have identified a possible Galactic chimney emanating from W4. We observed a 10 degrees diameter field centered on this region in the Her line using a CCD camera sensitive ...
  • The Extreme Scattering Event toward PKS 1741-038: VLBI Images 

    Lazio, T. J. W.; Fey, A. L.; Dennison, B.; Mantovani, F.; Simonetti, J. H.; Alberdi, A.; Foley, A. R.; Fiedler, R.; Garrett, M. A.; Hirabayashi, H.; Jauncey, D. L.; Johnston, K. J.; Marcaide, J.; Migenes, V.; Nicolson, G. D.; Venturi, T. (IOP PUBLISHING LTD, 2000-05)
    We report multiepoch VLBI observations of the source PKS 1741-038 (OT 068) as it underwent an extreme scattering event (ESE). Observations at four epochs were obtained, and images were produced at three of these. One of ...
  • Galactic Foregrounds in Owens Valley Radio Observatory and UCSB South Pole 1994 Cosmic Microwave Background Anisotropy Data 

    Mukherjee, P.; Dennison, B.; Ratra, B.; Simonetti, J. H.; Ganga, K.; Hamilton, J. C. (IOP PUBLISHING LTD, 2002-11)
    We study Galactic emission foreground contamination of the Owens Valley Radio Observatory and UCSB South Pole 1994 cosmic microwave background anisotropy data by cross-correlating with templates of infrared dust emission ...
  • Hydrogen-atom spectrum under a minimal-length hypothesis 

    Benczik, S.; Chang, L. N.; Minic, D.; Takeuchi, T. (American Physical Society, 2005-07)
    The energy spectrum of the Coulomb potential with minimal length commutation relations [X-i, P-j] = ih{delta ij(1 + beta P-2) + beta PiPj} is determined both numerically and perturbatively for arbitrary values of beta'/beta ...
  • Background independent quantum mechanics and gravity 

    Minic, D.; Tze, C. H. (American Physical Society, 2003-09-15)
    We argue that the demand of background independence in a quantum theory of gravity calls for an extension of standard geometric quantum mechanics. We discuss a possible kinematical and dynamical generalization of the latter ...
  • Monte Carlo simulation calculation of the critical coupling constant for two-dimensional continuum phi(4) theory 

    Loinaz, W.; Willey, R. S. (American Physical Society, 1998-10)
    We perform a Monte Carlo simulation calculation of the critical coupling constant for the continuum two-dimensional (lambda/4) phi(4) theory. The critical coupling constant we obtain is [lambda/mu(2)](crit) = 10.26(-.04)(+.08). ...
  • Charge assignments in multiple-U(1) gauge theories 

    Loinaz, W.; Takeuchi, T. (American Physical Society, 1999-12-01)
    We discuss the choice of gauge field basis in multiple-U(1) gauge theories. We find that there is a preferred basis, specified by the charge orthogonality condition, in which the U(1) gauge fields do not mix under one-loop ...
  • Notes on spacetime thermodynamics and the observer dependence of entropy 

    Marolf, D.; Minic, D.; Ross, S. F. (American Physical Society, 2004-03)
    Because of the Unruh effect, accelerated and inertial observers differ in their description of a given quantum state. The implications of this effect are explored for the entropy assigned by such observers to localized ...
  • Constraints on R-parity violating couplings from CERN LEP and SLAG SLD hadronic observables 

    Lebedev, O.; Loinaz, W.; Takeuchi, T. (American Physical Society, 2000-07-01)
    We analyze the one loop corrections to hadronic Z decays in an R-parity violating extension to the minimal supersymmetric standard model. Performing a global fit to all the hadronic observables at the Z peak, we obtain ...
  • NuTeV anomaly, lepton universality, and nonuniversal neutrino-gauge couplings 

    Loinaz, W.; Okamura, N.; Rayyan, S.; Takeuchi, T.; Wijewardhana, L. C. R. (American Physical Society, 2004-12)
    In previous studies we found that models with flavor-universal suppression of the neutrino-gauge couplings are compatible with NuTeV and Z-pole data. In this paper we expand our analysis to obtain constraints on flavor-dependent ...
  • NuTeV anomaly, neutrino mixing, and a heavy Higgs boson 

    Loinaz, W.; Okamura, N.; Takeuchi, T.; Wijewardhana, L. C. R. (American Physical Society, 2003-04)
    Recent results from the NuTeV experiment at Fermilab and the deviation of the Z invisible width, measured at CERN LEP and the SLAC Linear Collider, from its standard model (SM) prediction suggest the suppression of neutrino-Z ...
  • Constraints on R-parity violating couplings from lepton universality 

    Lebedev, O.; Loinaz, W.; Takeuchi, T. (American Physical Society, 2000-07-01)
    We analyze the one loop corrections to leptonic W and Z decays in an R-parity violating extension to the minimal supersymmetric standard model. We find that lepton universality violation in the Z line-shape variables alone ...

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