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119 papers · 1 filter

math.OC2000★ 1 cited

The simplest examples where the simplex method cycles and conditions where EXPAND fails to prevent cycling

J. A. J. Hall, K. I. M. McKinnon

This paper introduces a class of linear programming examples which cause the simplex method to cycle indefinitely and which are the simplest possible examples showing this behaviou…

hep-ex2000★ 2 cited

Status of the LHCb Experiment

Franz Muheim

We present the status of the LHCb experiment which will make precision measurements of CP violation in meson decays. The motivation for the experiment and an overview of the de…

hep-ex2000

Multianode Photo Multipliers for Ring Imaging Cherenkov Detectors

Franz Muheim

The 64-channel Multianode Photo Multiplier has been evaluated as a possible choice for the photo detectors of the LHCb Ring Imaging Cherenkov detector.

math.DG2000

The Penrose transform for compactly supported cohomology

Toby N Bailey, Liana David

We present a version of the Penrose transform which relates compactly supported cohomology on a complex or CR manifold Z to kernels and cokernels of differential operators on a par…

hep-ph2000★ 56 cited

Beyond leading order effects in photon pair production at the Tevatron

T. Binoth, J. Ph. Guillet, E. Pilon +1

We discuss effects induced by beyond leading order contributions to photon pair production. We point out that next to leading order contributions to the fragmentation component of…

astro-ph2000★ 171 cited

Scaling of N-body calculations

H. Baumgardt

We report results of collisional N-body simulations aimed to study the N-dependance of the dynamical evolution of star clusters. Our clusters consist of equal-mass stars and are in…

cond-mat2000★ 4 cited

A renormalized expression for the turbulent energy dissipation rate

C. Johnston, W. D. McComb

Conditional elimination of degrees of freedom is shown to lead to an exact expression for the rate of turbulent energy dissipation in terms of a renormalized viscosity and a correc…

astro-ph2000★ 10 cited

Predicting the peculiar velocities of nearby PSC-z galaxies using the Least Action Principle

J. Sharpe, M. Rowan-Robinson, A. Canavezes +12

We use the Least Action Principle to predict the peculiar velocities of PSC-z galaxies inside \km. Linear theory is used to account for tidal effects to \km, and…

physics.ao-ph2000★ 11 cited

Modelling horizontal and vertical concentration profiles of ozone and oxides of nitrogen within high-latitude urban area

J. P. Nicholson, K. J. Weston, D. Fowler

A Lagrangian column model has been developed to simulate the mean (monthly and annual) three-dimensional structure in ozone and nitrogen oxides concentrations in the boundary layer…

astro-ph2000★ 961 cited

The 2dF Galaxy Redshift Survey: Near Infrared Galaxy Luminosity Functions

Shaun Cole, Peder Norberg, Carlton Baugh +24

We combine the 2MASS extended source catalogue and the 2dFGRS to produce an IR selected galaxy catalogue with 17,173 measured redshifts. We use this extensive dataset to estimate t…

astro-ph2000★ 54 cited

PSR J1740-3052 - a pulsar with a massive companion

I. H. Stairs, R. N. Manchester, A. G. Lyne +14

We report on the discovery of a binary pulsar, PSR J1740-3052, during the Parkes multibeam survey. Timing observations of the 570-ms pulsar at Jodrell Bank and Parkes show that it…

astro-ph2000★ 123 cited

The 2dF Galaxy Redshift Survey: The Number and Luminosity Density of Galaxies

Nicholas Cross, Simon P. Driver, Warrick Couch +29

We present the bivariate brightness distribution (BBD) for the 2dF Galaxy Redshift Survey (2dFGRS) based on a preliminary subsample of 45,000 galaxies. The BBD is an extension of t…

astro-ph2000★ 660 cited

The Luminosity Function of Galaxies in SDSS Commissioning Data

SDSS Collaboration, M. R. Blanton

During commissioning observations, the Sloan Digital Sky Survey (SDSS) has produced one of the largest existing galaxy redshift samples selected from CCD images. Using 11,275 galax…

physics.flu-dyn2000

The Numerical Solution of Nekrasov's Equation in the Boundary Layer near the Crest, for Waves near the Maximum Height

J. G. Byatt-Smith

Nekrasov's integral equation describing water waves of permanent form, determines the angle phi that the wave surface makes with the horizontal. The independent variable s is a sui…

astro-ph2000★ 58 cited

Very Low Mass Stars and Brown Dwarfs of the Young Open Cluster IC2391

D. Barrado y Navascués, John R. Stauffer, César Briceño +4

We have identified a large sample of probable low mass members of the young open cluster IC2391 based on optical (VRIZ) and Infrared (JHK) photometry. Our sample includes 50 pr…

cond-mat.str-el2000

Auger spectroscopy of strongly correlated systems: present status and future trends

Claudio Verdozzi, Michele Cini, Andrea Marini

We review the Cini-Sawatzky approach to the line shape analysis of Auger CVV transitions, in its basic and original formulation. Then, several extensions of the theory are reviewed…

hep-ph2000★ 31 cited

Soft Resummation of Quark Anomalous Dimensions and Coefficient Functions in MS-bar Factorization

Simon Albino, Richard D. Ball

The asymptotic behaviour at large N of the MS-bar quark anomalous dimensions is derived to all orders assuming only MS-bar factorization and standard results for the exponentiation…

hep-th2000★ 252 cited

An M-theory Flop as a Large N Duality

M. Atiyah, J. Maldacena, C. Vafa

We show how a recently proposed large duality in the context of type IIA strings with supersymmetry in 4 dimensions can be derived from purely geometric considerat…

hep-ph2000★ 2k cited

HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)

G. Corcella, I. G. Knowles, G. Marchesini +5

HERWIG is a general-purpose Monte Carlo event generator, which includes the simulation of hard lepton-lepton, lepton-hadron and hadron-hadron scattering and soft hadron-hadron coll…

hep-ph2000★ 66 cited

Small-x Resummation and HERA Structure Function Data

Guido Altarelli, Richard D. Ball, Stefano Forte

We apply our systematic NLO small x resummation of singlet splitting functions to the scaling violations of structure functions and compare the results with data. We develop variou…

astro-ph2000★ 6 cited

Apparent and actual galaxy cluster temperatures

Andrew R Liddle, Pedro T P Viana, A Kathy Romer +1

The redshift evolution of the galaxy cluster temperature function is a powerful probe of cosmology. However, its determination requires the measurement of redshifts for all cluster…

astro-ph2000★ 7 cited

Starburst activity in a ROSAT Narrow Emission-Line Galaxy

K. F. Gunn, I. M. McHardy, O. Almaini +12

We present multiwaveband photometric and optical spectropolarimetric observations of the R=15.9 narrow emission line galaxy R117_A which lies on the edge of the error circle of the…

astro-ph2000★ 10 cited

Detection Limits for Super-Hubble Suppression of Causal Fluctuations

Arjun Berera, Alan F. Heavens

We investigate to what extent future microwave background experiments might be able to detect a suppression of fluctuation power on large scales in flat and open universe models. S…

astro-ph2000★ 111 cited

Absolute Proper Motions of Open Clusters: I. Observational data

H. Baumgardt, C. Dettbarn, R. Wielen

Mean proper motions and parallaxes of 205 open clusters were determined from their member stars found in the Hipparcos Catalogue. 360 clusters were searched for possible members, e…