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19922026
Showing 1999Show all

49 papers · 1 filter

nucl-ex1999★ 237 cited

Evidence of Xi hypernuclear production in the ^{12}C(K^-,K^+)^{12}_{Xi}Be reaction

P. Khaustov, D. E. Alburger, P. D. Barnes +42

The E885 collaboration utilized the 1.8 GeV/c K^- beam line at the AGS to accumulate 3 x 10^5 (K^-,K^+) events. Xi hypernuclear states are expected to be produced through the react…

astro-ph1999

VLBI observations of 3C273 at 22 GHz and 43 GHz. II: test of Synchrotron Self-Compton process

F. Mantovani, W. Junor, I. M. McHardy +1

The VLBI observations at 22 GHz and 43 GHz of the quasar 3C273 obtained during a multi-frequency campaign in late 1992 in the radio, millimetre and X-ray bands allow us to derive t…

math.DG1999

Einstein Manifolds and Contact Geometry

Charles P. Boyer, Krzysztof Galicki

We show that every K-contact Einstein manifold is Sasakian-Einstein and discuss several corollaries of this result.

hep-ex1999★ 52 cited

Search for the Charged Higgs Boson in the Decays of Top Quark Pairs in the and Channels at =1.8 TeV

T. Affolder

Top quark production offers the unique opportunity to search for a charged Higgs boson (), as the contribution from can be large in extensions of the St…

quant-ph1999★ 101 cited

Qutrit Entanglement

Carlton M. Caves, Gerard J. Milburn

We consider the separability of various joint states for N qutrits. We derive two results: (i) the separability condition for a two-qutrit state that is a mixture of the maximally…

cond-mat.stat-mech1999★ 957 cited

Epidemics and percolation in small-world networks

Cristopher Moore, M. E. J. Newman

We study some simple models of disease transmission on small-world networks, in which either the probability of infection by a disease or the probability of its transmission is var…

hep-ex1999★ 52 cited

Search for Scalar Top and Scalar Bottom Quarks in collisions at TeV

CDF Collaboration

We have searched for direct pair production of scalar top and scalar bottom quarks in 88 pb of collisions at TeV with the CDF detector. We looked f…

hep-ex1999★ 36 cited

A New Measurement of the Rare Decay

H. Ma, R. Appel, G. S. Atoyan +25

More than 400 events were observed in a rare decay experiment at the AGS. Normalized to the decay, the branching ratio is determin…

hep-ex1999★ 119 cited

Production of Y(1S) Mesons from chib Decays in pp(bar) Collisions at sqrt(s)=1.8 TeV

CDF Collaboration, T. Affolder

We have reconstructed the radiative decays and in collisions at TeV, and measured the fraction of $Υ(1S…

cond-mat.soft1999★ 75 cited

Stress Relaxation of Entangled Polymer Networks

Gary S. Grest, Mathias Puetz, Kurt Kremer +1

The non-linear stress-strain relation for crosslinked polymer networks is studied using molecular dynamics simulations. Previously we demonstrated the importance of trapped entangl…

quant-ph1999★ 103 cited

Entangling Dipole-Dipole Interactions and Quantum Logic in Optical Lattices

G. K. Brennen, I. H. Deutsch, P. S. Jessen

We study a means of creating multiparticle entanglement of neutral atoms using pairwise controlled dipole-dipole interactions in a three dimensional optical lattice. For tightly tr…

hep-ex1999★ 13 cited

Search for a W' Boson via the Decay Mode W' -> mu nu in 1.8 TeV p-pbar Collisions

CDF Collaboration, F. Abe

We report the results of a search for a W' boson produced in p-pbar collisions at a center-of-mass energy of 1.8 TeV using a 107 pb-1 data sample recorded by the Collider Detector…

hep-ex1999★ 51 cited

Measurement of the Helicity of W Bosons in Top Quark Decays

CDF Collaboration, T. Affolder

We use the transverse momentum spectrum of leptons in the decay chain t-->bW with W-->l nu to measure the helicity of the W bosons in the top quark rest frame. Our measurement uses…

hep-lat1999★ 10 cited

Simulations of Protein Folding

Michael Cahill, Mark Fleharty, Kevin Cahill

We have developed a simple, phenomenological, Monte-Carlo code that predicts the three-dimensional structure of globular proteins from the DNA sequences that define them. We have a…

cond-mat1999★ 5 cited

Internal Diffusion-Limited Aggregation: Parallel Algorithms and Complexity

Cristopher Moore, Jonathan Machta

The computational complexity of internal diffusion-limited aggregation (DLA) is examined from both a theoretical and a practical point of view. We show that for two or more dimensi…

hep-ex1999★ 29 cited

Search for a Fourth-Generation Quark More Massive than the Z0 Boson in ppbar Collisions at sqrt(s) = 1.8 TeV

CDF Collaboration, T. Affolder

We present the results of a search for pair production of a fourth-generation charge -1/3 quark (b') in sqrt(s)=1.8 TeV ppbar collisions using 88 pb^(-1) of data obtained with the…

hep-ex1999★ 29 cited

Measurement of b Quark Fragmentation Fractions in p-pbar Collisions at sqrt(s)=1.8 TeV

T. Affolder, CDF Collaboration

We have studied the production of B hadrons in 1.8-TeV p-pbar collisions. We present measurements of the fragmentation fractions, f_u, f_d, f_s and f_baryon, of produced b quarks t…

quant-ph1999★ 23 cited

Spatial Correlation Diagnostics for Atoms in Optical Lattices

John P. Grondalski, Paul M. Alsing, Ivan H. Deutsch

We explore the use of first and second order same-time atomic spatial correlation functions as a diagnostic for probing the small scale spatial structure of atomic samples trapped…

hep-ex1999★ 128 cited

A Measurement of from with the CDF detector

CDF Collaboration

This paper reports an updated measurement of the Standard Model CP violation parameter using the CDF Detector at Fermilab. The entire Run I data sample of 110 pb of…

astro-ph1999★ 66 cited

Kinematics of ionized and molecular hydrogen in the core of M100

J. H. Knapen, I. Shlosman, C. H. Heller +3

We present high angular and velocity resolution two-dimensional kinematic observations in the spectral lines of H alpha and CO J=1-0 of the circumnuclear starburst region in the ba…

astro-ph1999★ 9 cited

Rich Cluster and Non-Cluster Radio Galaxies & the (P,D) Diagram for a Large Number of FR I and FR II Sources

M. J. Ledlow, F. N. Owen, J. A. Eilek

We present a comparison of the optical and radio properties of radio sources inside and outside the cores of rich clusters from combined samples of more than 380 radio sources. We…

hep-ex1999★ 32 cited

Search for R-parity Violating Supersymmetry using Like-Sign Dielectrons in \ppbar Collisions at TeV

CDF Collaboration, F. Abe

We present a search for like-sign dielectron plus multijet events using 107 pb-1 of data in \ppbar collisions at TeV collected in 1992-95 by the CDF experiment. Fi…

astro-ph1999★ 35 cited

An X-ray and Optical Investigation of the Environments Around Nearby Radio Galaxies

N. A. Miller, F. N. Owen, J. O. Burns +2

Investigations of the cluster environment of radio sources have not shown a correlation between radio power and degree of clustering. However, it has been demonstrated that extende…

quant-ph1999★ 26 cited

Classical limit in terms of symbolic dynamics for the quantum baker's map

A. N. Soklakov, R. Schack

We derive a simple closed form for the matrix elements of the quantum baker's map that shows that the map is an approximate shift in a symbolic representation based on discrete pha…