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174 papers · 1 filter

hep-ex1999★ 13 cited

Search for a 33.9 MeV/c^2 Neutral Particle in Pion Decay

J. A. Formaggio, E. D. Zimmerman, T. Adams +41

The E815 (NuTeV) neutrino experiment has performed a search for a 33.9 MeV/c^2 weakly-interacting neutral particle produced in pion decay. Such a particle may be responsible for an…

hep-ex1999★ 27 cited

Hard Single Diffraction in pbarp Collisions at root-s = 630 and 1800 GeV

The D0 Collaboration, B. Abbott

Using the D0 detector, we have studied events produced in proton-antiproton collisions that contain large forward regions with very little energy deposition (``rapidity gaps'') and…

hep-ph1999

Cosmic Microwave Background: Past, Future, and Present

Scott Dodelson

I explain the origin and evolution of anisotropies in the Cosmic Microwave Background (CMB) and argue that upcoming experiments will measure cosmological and fundamental parameters…

hep-ph1999★ 83 cited

Single Top Quark Production at the LHC: Understanding Spin

Gregory Mahlon, Stephen Parke

We show that the single top quarks produced in the Wg-fusion channel at a proton-proton collider at a center-of-mass energy sqrt{s}=14 TeV posses a high degree of polarization in t…

hep-th1999★ 45 cited

Vacuum Domain Walls in D-dimensions: Local and Global Space-Time Structure

Mirjam Cvetic, Jing Wang

We study local and global gravitational effects of (D-2)-brane configurations (domain-walls) in the vacuum of D-dimensional space-time. We focus on infinitely thin vacuum domain wa…

hep-ex1999

Recent Results and Perspectives at CDF and D0

H. E. Montgomery

Over the course of the past years the experimental measurements performed by the two large collaborations, CDF and DØ, at the Fermilab Tevatron Collider have fueled advances in our…

astro-ph1999★ 21 cited

COSMOS: A Hybrid N-Body/Hydrodynamics Code for Cosmological Problems

P. M. Ricker, S. Dodelson, D. Q. Lamb

We describe a new hybrid N-body/hydrodynamical code based on the particle-mesh (PM) method and the piecewise-parabolic method (PPM) for use in solving problems related to the evolu…

hep-ex1999

Tests of Perturbative QCD and Jet Physics

John Womersley

I describe the current status of tests of perturbative QCD, using measurements of jet, photon, weak boson and heavy flavor production from the Tevatron, LEP and HERA. Measurements…

hep-ph1999★ 30 cited

Large-x Parton Distributions

S. Kuhlmann, J. Huston, J. Morfin +5

Reliable knowledge of parton distributions at large x is crucial for many searches for new physics signals in the next generation of collider experiments. Although these are genera…

astro-ph1999★ 4 cited

Dark Matter, Dark Energy and Fundamental Physics

Michael S. Turner

More than sixty years ago Zwicky made the case that the great clusters of galaxies are held together by the gravitational force of unseen (dark) matter. Today, the case is stronger…

hep-ex1999★ 78 cited

The Isolated Photon Cross Section in p pbar Collisions at sqrt(s) = 1.8 TeV

D0 Collaboration, B. Abbott

We report a new measurement of the cross section for the production of isolated photons, with transverse energies (ET) above 10 GeV and pseudorapidities |eta| < 2.5, in p pbar coll…

hep-th1999★ 1 cited

D0 and D1 Brane With and Extended Symmetry

Moshe Moshe, Norisuke Sakai

D0 brane (D-particle) and D1 brane actions possess first and second class constraints that result in local symmetry. The symmetry of the D-particle and the D1 brane is exte…

hep-ph1999★ 86 cited

Electroweak Symmetry Breaking and Extra Dimensions

Hsin-Chia Cheng, Bogdan A. Dobrescu, Christopher T. Hill

Electroweak symmetry can be naturally broken by observed quark and gauge fields in various extra-dimensional configurations. No new {\it fundamental} fields are required below the…

hep-ex1999★ 1 cited

Working with Arrays of Inexpensive EIDE Disk Drives

David Sanders, Chris Riley, Lucien Cremaldi +2

In today's marketplace, the cost per Terabyte of disks with EIDE interfaces is about a third that of disks with SCSI. Hence, three times as many particle physics events could be pu…

hep-ex1999★ 22 cited

A Measurement of the W to tau+nu Production Cross Section in p-pbar Collisions at sqrt(s) = 1.8 TeV

D0 Collaboration, B. Abbott

We report on a measurement of sigma(p-pbar to W+X) times B(W to tau+nu) in p-pbar collisions at sqrt(s) = 1.8 TeV at the Fermilab Tevatron. The measurement is based on an integrate…

hep-ex1999★ 22 cited

Limits on Anomalous WWgamma and WWZ Couplings from WW/WZ->enujj Production

D0 collaboration, B. Abbott, M. Abolins

Limits on anomalous WWgamma and WWZ couplings are presented from a study of WW/WZ->enujj events in ppbar collisions at sqrt{s}=1.8 TeV. Results from the analysis of data collected…

hep-ex1999★ 37 cited

Probing BFKL Dynamics in the Dijet Cross Section at Large Rapidity Intervals in ppbar Collisions at sqrt{s}=1800 and 630 GeV

D0 Collaboration, B. Abbott

Inclusive dijet production at large pseudorapidity intervals (delta_eta) between the two jets has been suggested as a regime for observing BFKL dynamics. We have measured the dijet…

hep-ex1999★ 12 cited

Limits on Quark Compositeness from High Energy Jets in PbarP Collisions at 1.8 TeV

D0 collaboration, B. Abbott

Events in PbarP collisions at sqrt(s)=1.8 TeV with total transverse energy exceeding 500 GeV are used to set limits on quark substructure. The data are consistent with next-to-lead…

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…

hep-ex1999★ 25 cited

Multidimensional Resonance Analysis of

E. M. Aitala

We present the results of a five-dimensional resonant amplitude analysis of the system based on reconstructed decays. These data were produced i…

astro-ph1999★ 207 cited

Ultra-High Energy Cosmic Rays from Young Neutron Star Winds

P. Blasi, R. I. Epstein, A. V. Olinto

The long-held notion that the highest-energy cosmic rays are of distant extragalactic origin is challenged by observations that events above eV do not exhibit the ex…

hep-lat1999★ 3 cited

Quark Confinement and Surface Critical Phenomena

K. J. Juge, J. Kuti, C. J. Morningstar

Surface critical phenomena and the related onset of Goldstone modes probe the fundamental properties of the confining flux in Quantum Chromodynamics. New ideas on surface roughenin…

astro-ph1999★ 23 cited

Cluster versus POTENT Density and Velocity Fields: Cluster Biasing and Omega

E. Branchini, I. Zehavi, M. Plionis +1

The density and velocity fields as extracted from the Abell/ACO clusters are compared to the corresponding fields recovered by the POTENT method from the Mark~III peculiar velociti…

hep-ph1999★ 92 cited

Long-Baseline Study of the Leading Neutrino Oscillation at a Neutrino Factory

V. Barger, S. Geer, R. Raja +1

Within the framework of three-flavor neutrino oscillations, we consider the physics potential of ν_e --> ν_μappearance and ν_μ--> ν_μsurvival measurements at a neutrino factory for…