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10 papers · 1 filter
Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions
S. Frixione, M. L. Mangano, P. Nason +1
We critically examine the validity of the Weizsäcker-Williams approximation in electron-hadron collisions. We show that in its commonly used form it can lead to large errors, and w…
Parallel P3M with exact calculation of short range forces
T. Theuns
A P3M (Particle-Particle, Particle-Mesh) algorithm to compute the gravitational force on a set of particles is described. The gravitational force is computed using Fast Fourier Tra…
The Charm Content of W+1 Jet Events as a Probe of the Strange Quark Distribution Function
U. Baur, F. Halzen, S. Keller +2
We investigate the prospects for measuring the strange quark distribution function of the proton in associated plus charm quark production at the Tevatron. The quark sign…
New Universality Classes for Two-Dimensional -Models
Sergio Caracciolo, Robert G. Edwards, Andrea Pelissetto +1
We argue that the two-dimensional -invariant lattice -model with mixed isovector/isotensor action has a one-parameter family of nontrivial continuum limits, only one of wh…
A General Limitation on Monte Carlo Algorithms of Metropolis Type
Sergio Caracciolo, Andrea Pelissetto, Alan D. Sokal
We prove that for any Monte Carlo algorithm of Metropolis type, the autocorrelation time of a suitable ``energy''-like observable is bounded below by a multiple of the correspondin…
Heavy Quark Correlations in Photon-Hadron Collisions
S. Frixione, M. Mangano, P. Nason +1
We describe a next-to-leading-order calculation of the fully exclusive parton cross section for the photoproduction of heavy quarks. We use our result to compute quantities of inte…