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110 papers · 1 filter

hep-ph1999★ 7 cited

Reply to comment on `Parton distributions, d/u, and higher twist effects at high x'

U. K. Yang, A. Bodek

M. Melnitchouk et al. [hep-ex/9912001] misunderstand the model of Frankfurt and Strikman for nuclear binding effects in deep inelastic scattering (DIS). In addition, their comment…

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-ex1999★ 97 cited

Two-body B Meson Decays to eta and eta': Observation of B->eta K*

The CLEO Collaboration, S. J. Richichi

In a sample of 19 million produced B mesons, we have observed the decays B -> eta K* and improved our previous measurements of B -> eta'K. The branching fractions we measure for th…

hep-ph1999★ 7 cited

BFKL dynamics at hadron colliders

Carlo Ewerz, Lynne H. Orr, W. James Stirling +1

Hadron colliders can provide important tests of BFKL `small-x' dynamics. We discuss two examples of such tests, the inclusive dijet jet cross section at large rapidity separation a…

astro-ph1999★ 75 cited

Coronal activity as a consequence of dynamos in astrophysical rotators

Eric G. Blackman, George B. Field

We show that the presence of a steady $\ao$ dynamo in astrophysical rotators likely leads to an outflow of relative magnetic helicity and thus magnetic energy available for particl…

astro-ph1999★ 41 cited

Structure and Stability of Keplerian MHD Jets

Thibaut Lery, Adam Frank

MHD jet equilibria that depend on source properties are obtained using a simplified model for stationary, axisymmetric and rotating magnetized outflows. The present rotation laws a…

astro-ph1999

A Paradigm Lost: New Theories for Aspherical PNe

Adam Frank

Theoretical Models for the shaping of PNe are reviewed in light of new high resolution images. The new data indicate the purely hydrodynamic interacting stellar winds model can not…

hep-ph1999★ 59 cited

O(alpha) corrections to e+e- --> WW --> 4fermions(+gamma): first numerical results from RACOONWW

A. Denner, S. Dittmaier, M. Roth +1

First numerical results of the Monte Carlo generator RACOONWW for e+e- --> WW --> 4fermions(+gamma) in the electroweak Standard Model are presented. This event generator is the fir…

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-ph1999★ 28 cited

Pseudo-Dirac Neutrinos

Darwin Chang, Otto C. W. Kong

We propose a scheme in which a pseudo-Dirac structure for three family of light neutrinos is generated naturally. An extended Higgs sector with a majoron is used for the generation…

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★ 134 cited

Study of Exclusive Radiative B Meson Decays

CLEO Collaboration

We have investigated exclusive, radiative B meson decays to charmless mesons (ρ, ω, ϕ, K^*(892), K^*_2(1430)) in 9.7\times 10^6 BBbar decays accumulated with the CLEO detector. The…

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…

cs.DS1999★ 1 cited

The phase transition in random Horn satisfiability and its algorithmic implications

Gabriel Istrate

Let c>0 be a constant, and be a random Horn formula with n variables and clauses, chosen uniformly at random (with repetition) from the set of all nonempty Hor…

hep-ph1999★ 1 cited

A Model of Interacting Partons for Hadronic Structure Functions

G. S. Krishnaswami

We present a model for the structure of baryons in which the valence partons interact through a linear potential. This model can be derived from QCD in the approximation where tran…

hep-ph1999★ 2 cited

Vector Boson Transverse Momentum Distributions at the Tevatron

Gennaro Corcella, Michael H. Seymour

We show vector boson transverse momentum distributions at the Tevatron, obtained by running the HERWIG Monte Carlo event generator with matrix-element corrections. We compare our r…

hep-th1999★ 7 cited

Large Gauge Ward Identity

Ashok Das, Gerald Dunne, J. Frenkel

We study the question of the Ward identity for "large" gauge invariance in 0+1 dimensional theories. We derive the relevant Ward identities for a single flavor fermion and a single…

hep-ph1999★ 2 cited

On the Top Mass Reconstruction Using Leptons

Gennaro Corcella

I discuss the feasibility of measuring the top quark mass by the using of final states with leptons and J/ψat hadron colliders. I also investigate the impact of matrix-element corr…

hep-ex1999★ 68 cited

Update of the Search for the Neutrinoless Decay

S. Ahmed, CLEO Collaboration

We present an update of the search for the lepton family number violating decay tau -> mu gamma using 12.6 million tau+tau- pairs collected with the CLEO detector. No evidence of a…

chao-dyn1999★ 41 cited

Density-dependent diffusion in the periodic Lorentz gas

R. Klages, Chr. Dellago

We study the deterministic diffusion coefficient of the two-dimensional periodic Lorentz gas as a function of the density of scatterers. Results obtained from computer simulations…