Browsing Pure & Applied Mathematics (Scholarly Publications) by Author "PEARDON, MICHAEL JAMES"
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The 2 + 2 anisotropic Wilson gluon action with applications
PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (2004)A generalization of anisotropic lattices to include a 2+2 discretization is discussed. As a part of this program, we determine the oneloop correction to the gluon selfenergy and analyse the restoration of Lorentz ... 
Analytic smearing of SU(3) link variables in lattice QCD
PEARDON, MICHAEL JAMES (American Physical Society, 2004)An analytic method of smearing link variables in lattice QCD is proposed and tested. The differentiability of the smearing scheme with respect to the link variables permits the use of modern Monte Carlo updating methods ... 
Charmonium at high temperature in twoflavor QCD
PEARDON, MICHAEL JAMES (American Physical Society, 2007)We compute charmonium spectral functions in 2flavor QCD on anisotropic lattices using the maximum entropy method. Our results suggest that the Swaves (J= and c) survive up to temperatures close to 2Tc, while the Pwaves ... 
Charmonium properties in the quarkgluon plasma
PEARDON, MICHAEL JAMES (2007)We present results for charmonium correlators and spectral functions in 2flavour QCD on anisotropic lattices. Our results indicate that the Swaves (J/y and hc) survive up to temperatures close to 2Tc, while the Pwaves ... 
Charmonium spectral functions in Nf=2 QCD
PEARDON, MICHAEL JAMES; SKULLERUD, JONIVAR (Proceedings of Science, 2005)We report on a study of charmonium at high temperature in 2flavour QCD. This is the first such study with dynamical fermions. Using an improved anisotropic lattice action, spectral functions are extracted from correlators ... 
Charmonium spectroscopy on dynamical anisotropic lattices
PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE; SKULLERUD, JONIVAR (Elsevier, 2006)We present a first study of the charmonium spectrum on Nf = 2 dynamical, anisotropic lattices. We take advantage of alltoall quark propagators to build spatially extended interpolating operators to increase the overlap ... 
Coarse lattice results for glueballs and hybrids
PEARDON, MICHAEL JAMES (Elsevier, 1998)A review of new results from lattice simulations of glueballs and heavyquark hybrid mesons is presented. 
Comparison of analysis techniques for extracting resonance parameters from lattice Monte Carlo data
PEARDON, MICHAEL JAMES; MC MANUS, DARRAN (2012) 
Dynamical fermion simulations of QCD on anisotropic lattices
PEARDON, MICHAEL JAMES (Elsevier, 2004)Simulations of QCD with two flavours of improved Wilson quarks on an anisotropic lattice are discussed. Methods for improving the performance of the Hybrid Monte Carlo (HMC) algorithm in these studies are described. 
Dynamical fermion simulations using Luscher's local bosonic action algorithm
PEARDON, MICHAEL JAMES (Elsevier, 1995)The twoflavour Schwinger model is used to test the local boson action algorithm of M Luescher. The autocorrelation time is found to rise linearly with the number of auxiliary boson fields. An extension to the algorithm ... 
Dynamical QCD simulations on anisotropic lattices
PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (2006)The simulation of QCD on dynamical ( N f 2 ) anisotropic lattices is described. A method for nonperturbative renormalisation of the parameters in the anisotropic gauge and quark actions is presented. The precision ... 
Efficient glueball simulations on anisotropic lattices
PEARDON, MICHAEL JAMES (American Physical Society, 1997)Monte Carlo results for the lowlying glueball spectrum using an improved, anisotropic action are presented. Ten simulations at lattice spacings ranging from 0.2 to 0.4 fm and two different anisotropies have been performed ... 
Excitations of the torelon
PEARDON, MICHAEL JAMES (Elsevier, 2004)The excitations of gluonic flux tube in a periodic lattice are examined. Monte Carlo simulations from an anisotropic lattice are presented and the comparison with effective string models is discussed. 
Excited and exotic charmonium spectroscopy from lattice QCD
RYAN, SINEAD MARIE; PEARDON, MICHAEL JAMES (2012)We present a spectrum of highly excited charmonium mesons up to around 4.5 GeV calculated using dynamical lattice QCD. Employing novel computational techniques and the variational method with a large basis of carefully ... 
Excited D and Ds meson spectroscopy from lattice QCD
PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (2012) 
Excited spectroscopy of charmed mesons from lattice QCD
RYAN, SINEAD MARIE; PEARDON, MICHAEL JAMES (2013)We present spectra of highly excited D and D s mesons up to around 3.8 GeV determined using dynamical lattice QCD. We employ novel computational techniques and the variational method with a large basis of carefully constructed ... 
Gauge theories on a 2+2 anisotropic lattice
PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (American Physical Society, 2003)The implementation of gauge theories on a fourdimensional anisotropic lattice with two distinct lattice spacings is discussed, with special attention to the case where two axes are finely and two axes are coarsely discretized. ... 
Glueball matrix elements on anisotropic lattices
PEARDON, MICHAEL JAMES (Elsevier, 1998)We describe a lattice calculation of the matrix elements relevant for glueball production in J/ radiative decays. The techniques for such a calculation on anisotropic lattices with an improved action are outlined. We ... 
Glueball matrix elements on anisotropic lattices
PEARDON, MICHAEL JAMES (Elsevier, 2004)The glueballtovacuum matrix elements of local gluonic operators in scalar, tensor, and pseudoscalar channels are investigated numerically on several anisotropic lattices with the spatial lattice spacing in the range ... 
Glueball spectrum and matrix elements on anisotropic lattices
PEARDON, MICHAEL JAMES (American Physical Society, 2006)The glueballtovacuum matrix elements of local gluonic operators in scalar, tensor, and pseudoscalar channels are investigated numerically on several anisotropic lattices with the spatial lattice spacing ranging from ...