University of Colorado Boulder

output

19922026

most citedSciPy 1.0--Fundamental Algorithms for Scientific Computing in Python

40.2k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 1997Show all

115 papers · 1 filter

nucl-th1997★ 5 cited

Kaon Electromagnetic Production on Nuclei

C. Bennhold, F. X. Lee, T. Mart +1

The formation and excitation of hypernuclei through kaon photoproduction is reviewed. Basic features of the production process are emphasized. The possibility of extracting new inf…

hep-ph1997★ 27 cited

Branching Ratios and CP Asymmetries of B Decays to a Vector and a Pseudoscalar Meson

N. G. Deshpande, B. Dutta, Sechul Oh

We consider two body decays of B meson into a light vector (V) and a pseudoscalar (P) meson. The constraint obtained from the $B \to P P$ modes on the parameter space of the input p…

hep-ex1997★ 11 cited

Measurement of $B r (D^{0} \to K^{-} π^{+})$ using Partila Reconstruction of $B ˉ \to D^{*+} X ℓ^{-} ν ˉ$

CLEO Collaboration, M. Artuso et al

We present a measurement of the absolute branching fraction for $D^{0} - > K^{-} p i^{+}$ using the reconstruction of the decay chain $B ba r - > D^{*+} X l^{-} n u ba r$ , $D^{*+} - > D^{0} p i^{+}$ wh…

hep-lat1997★ 56 cited

Quenched hadron spectroscopy with improved staggered quark action

MILC Collaboration, Claude Bernard, Tom Blum +9

We investigate light hadron spectroscopy with an improved quenched staggered quark action. We compare the results obtained with an improved gauge plus an improved quark action, an…

astro-ph1997★ 6 cited

The Physical Interpretation of X-ray Phase Lags and Coherence: RXTE Observations of Cygnus X--1 as a Case Study

M. A. Nowak, J. B. Dove, B. A. Vaughan +1

There have been a number of recent spectral models that have been successful in reproducing the observed X-ray spectra of galactic black hole candidates (GBHC). However, there stil…

hep-ex1997★ 7 cited

Study of Semileptonic Decays of B Mesons to Charmed Baryons

CLEO Collaboration, G. Bonvicini et al

Using data collected by the CLEO II detector at the center-of-mass energy on or near the Upsilon(4S) resonance, we have determined the 90% confidence level upper limit B(Bbar --> L…

cond-mat.mtrl-sci1997★ 99 cited

Stochastic Hysteresis and Resonance in a Kinetic Ising System

S. W. Sides, P. A. Rikvold, M. A. Novotny

We study hysteresis for a two-dimensional, spin-1/2, nearest-neighbor, kinetic Ising ferromagnet in an oscillating field, using Monte Carlo simulations and analytical theory. Atten…

hep-lat1997★ 15 cited

Light Hadron Spectroscopy on Coarse Lattices with O(a^2) Mean-Field Improved Actions

Frank X. Lee, Derek B. Leinweber

The masses and dispersions of light hadrons are calculated in lattice QCD using an O(a^2) tadpole-improved gluon action and an O(a^2) tadpole-improved next-nearest-neighbor fermion…

hep-ex1997★ 18 cited

Observation of the Radiative Decay $D^{*+} \to D^{+} γ$

CLEO Collaboration, J. Bartelt et al

We have observed a signal for the decay D*+ -> D+ gamma at a significance of 4 standard deviations. From the measured branching ratio B(D*+ -> D+ gamma)/B(D*+ -> D+ pi0)=0.055 +- 0…

hep-ex1997★ 66 cited

Observation of Exclusive Two-Body B Decays to Kaons and Pions

CLEO Collaboration, R. Godang et al

We have studied two-body charmless hadronic decays of B mesons into the final states $π π$ , $K π$ , and $K K$ . Using 3.3 million $B B ˉ$ pairs collected with the CLEO-II detector,…

hep-lat1997★ 61 cited

Revealing Topological Structure in the SU(2) Vacuum

Thomas DeGrand, Anna Hasenfratz, Tamas G. Kovacs

In this paper we derive a simple parametrization of the cycling method developed by us in our earlier work. The new method, called renormalization group (RG) mapping, consists of a…

hep-lat1997★ 4 cited

Light quark spectrum with improved gauge and fermion actions

MILC Collaboration, Claude Bernard, Tom DeGrand +9

We report on a study of the light quark spectrum using an improved gauge action and both Kogut-Susskind and Naik quark actions. We have studied six different lattice spacings, corr…

hep-lat1997★ 82 cited

Vortices and confinement at weak coupling

Tamas G. Kovacs, E. T. Tomboulis

We discuss the physical picture of thick vortices as the mechanism responsible for confinement at arbitrarily weak coupling in SU(2) gauge theory. By introducing appropriate variab…

astro-ph1997★ 69 cited

Synthetic Molecular Clouds from Supersonic MHD and Non-LTE Radiative Transfer Calculations

Paolo Padoan, Mika Juvela, John Bally +1

The dynamics of molecular clouds is characterized by supersonic random motions in the presence of a magnetic field. We study this situation using numerical solutions of the three-d…

astro-ph1997

Supersonic Random Flows in the Perseus Molecular Cloud

Paolo Padoan, John Bally, Youssef Billawala +2

We compare the statistical properties of J=1-0 13CO spectra observed in the Perseus Molecular Cloud with synthetic J=1-0 13CO spectra from a 5 pc model cloud. The synthetic spectra…

astro-ph1997★ 99 cited

Spatially Resolved STIS Spectroscopy of SN 1987A: Evidence for Shock Interaction with Circumstellar Gas

G. Sonneborn, C. S. J. Pun, R. A. Kimble +15

Visual and ultraviolet spatially resolved (~ 0."1) spectra of SN 1987A obtained on days 3715 and 3743 with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope sh…

astro-ph1997★ 56 cited

High-resolution near-infrared imaging of the Orion 114-426 silhouette disk

Mark J. McCaughrean, Hua Chen, John Bally +6

We present the first high-resolution near-infrared images of the edge-on silhouette circumstellar disk, Orion 114-426, made using NICMOS on the Hubble Space Telescope. Images taken…

solv-int1997★ 40 cited

Analytic and Asymptotic Methods for Nonlinear Singularity Analysis: a Review and Extensions of Tests for the Painlevé Property

Martin D. Kruskal, Nalini Joshi, Rod Halburd

The integrability (solvability via an associated single-valued linear problem) of a differential equation is closely related to the singularity structure of its solutions. In parti…

hep-ex1997★ 61 cited

Flavor-Specific Inclusive B Decays to Charm

CLEO Collaboration, T. E. Coan et al

We have measured the branching fractions for B -> D_bar X, B -> D X, and B -> D_bar X \ell^+ ν, where ``B'' is an average over B^0 and B^+, ``D'' is a sum over D^0 and D^+, and``D_…

astro-ph1997★ 35 cited

UV Absorption Lines from High-Velocity Gas in the Vela Supernova Remnant: New insights from STIS Echelle Observations of HD72089

E. B. Jenkins, T. M. Tripp, E. L. Fitzpatrick +12

The star HD72089 is located behind the Vela supernova remnant and shows a complex array of high and low velocity interstellar absorption features arising from shocked clouds. A spe…

astro-ph1997★ 92 cited

$1 0^{51}$ Ergs: The Evolution of Shell Supernova Remnants

T. W. Jones, Lawrence Rudnick, Byung-Il Jun +6

This paper reports on a workshop hosted by the University of Minnesota, March 23-26, 1997. It addressed fundamental dynamical issues associated with the evolution of shell supernov…

hep-lat1997★ 5 cited

Update on the hadron spectrum with two flavors of staggered quarks

The MILC Collaboration, C. Bernard, T. Blum +9

We present an update on the MILC Collaboration's light hadron spectrum calculation with two flavors of dynamical, staggered quarks. We present extrapolations of the nucleon to rho…

hep-lat1997

Some remarks on Abelian dominance

Tamas G. Kovacs, Zsolt Schram

We use a renormalisation group based smoothing to address two questions related to Abelian dominance. Smoothing enables us to extract the Abelian heavy-quark potential from time-li…