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- C R Allton, L Conti, +5 authors A Vladikas
- 1998

We present the first lattice measurement, using Non Perturbative Renormalization Method, of the B-parameters of the dimension-six four-fermion operators relevant for the supersymmetric corrections to the ∆S = 2 transitions.

- Chris Allton
- 1995

Results from recent lattice calculations of the decay constants fB and fD are reviewed. A discussion of the methods currently used is presented, together with an outline of the various systematic effects involved.

- C R Allton, F Karsch, E Laermann, C Schmidt
- 2005

We present results of a simulation of QCD on a 16 3 × 4 lattice with 2 continuum flavors of p4-improved staggered fermion with mass m/T = 0.4. Derivatives of the thermodynamic grand potential Ω with respect to quark chemical potential µ q up to fourth order are calculated, enabling estimates of the pressure, quark number density and associated… (More)

We compute charmonium spectral functions in 2-flavor QCD on anisotropic lattices using the maximum entropy method. Our results suggest that the S-waves (J= and c) survive up to temperatures close to 2T c , while the P-waves (c0 and c1) melt away below 1:2T c .

- James Perry, Lorna Smith, +14 authors J. M. Flynn
- J. Grid Comput.
- 2005

Quantum Chromodynamics (QCD) is an application area that requires access to large super-computing resources and generates huge amounts of raw data. UKQCD currently stores and requires access to around five terabytes of data, a figure that is expected to grow dramatically as the collaborations purpose built HPC system, QCDOC, comes on line in 2004. This data… (More)

Using the results of several quenched lattice simulations, we predict the value of the strange and charm quark masses in the continuum at the next-to-leading order, m M S s (µ = 2 GeV) = (128 ± 18) MeV and m M S ch (µ = 2 GeV) = (1.48± 0.28) GeV. The errors quoted above have been estimated by taking into account the original statistical error of the lattice… (More)

We present preliminary results for meson spectral functions at nonzero momentum, obtained from quenched lattice QCD simulations at finite temperature using the Maximal Entropy Method. Twisted boundary conditions are used to have access to many momenta p ∼ T. For light quarks, we observe a drastic modification when heating the system from below to above T c.… (More)

- Chris R. Allton
- 2008

Differences between lattice Monte Carlo data and perturbation theory (for example the lack of asymptotic scaling) are usually associated with the 'bad' behaviour of the bare lattice coupling g0 due to the effects of large (and unknown) higher order terms in g0. In this philosophy a new, renormalised coupling g ′ is defined with the aim of making the higher… (More)

- C. R. Allton, L. Giusti, F. Rapuano
- 1996

In this paper we study O(2000) (quenched) lattice configurations from the APE collaboration, for different lattice volumes and for 6.0 ≤ β ≤ 6.4 using both the Wilson and the SW-Clover fermion actions. We determine the light hadronic spectrum and meson decay constants and study the mesonic dispersion relation. We extract the hadronic variable J and the… (More)

- Shinji Ejiri, Chris R. Allton, +4 authors Christian Schmidt
- 2008

We discuss the phase structure and the equation of state for QCD at non-zero temperature and density. Derivatives of ln Z with respect to quark chemical potential µq up to fourth order are calculated for 2-flavor QCD, enabling estimates of the pressure, quark number density and associated susceptibilities as functions of µq via a Taylor series expansion.… (More)