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pro vyhledávání: '"I.T. Drummond"'
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Publikováno v:
Nuclear Physics B - Proceedings Supplements. 119:470-475
We calculate the two loop Landau mean links and the one loop renormalisation of the anisotropy for Wilson and improved SU(3) gauge actions, using twisted boundary conditions as a gauge invariant infrared regulator. We show these accurately describe s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::555e3e9fc86bd5829c5b19f924186429
https://doi.org/10.1016/s0920-5632(03)01589-5
https://doi.org/10.1016/s0920-5632(03)01589-5
Autor:
I.T. Drummond
Publikováno v:
Physics Letters B. 442:279-290
We present some simple scenarios for string breaking on the lattice based on a crude strong coupling model introduced previously. We review the dependence of the model on lattice spacing and extend it to include degenerate dynamical quarks and also m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76f90c037ef2ab3e67a22613339c048d
https://doi.org/10.1016/s0370-2693(98)01222-2
https://doi.org/10.1016/s0370-2693(98)01222-2
Publikováno v:
Physics Letters B. 408:308-314
We explore the effect of higher order operators in the non-relativistic formulation of QCD (NRQCD). We calculated masses in the bb-spectrum using quenched gauge configurations at β = 6.0 and two different NRQCD actions which have been corrected to o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ddadf3fd148b7378c976c68d098c2d6
https://doi.org/10.1016/s0370-2693(97)00813-7
https://doi.org/10.1016/s0370-2693(97)00813-7
Autor:
I.T. Drummond, R. R. Horgan
Publikováno v:
Physics Letters B. 327:107-113
We apply improved Langevin methods with Fourier acceleration to SU ( N ) × SU ( N )/SU ( N ) spin models in two dimensions for N = 3,4 and 6. We show that Fourier acceleration combined with operator improvement techniques does lead to a considerable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6423a065d37e20994e93ae0f7d376e88
https://doi.org/10.1016/0370-2693(94)91537-7
https://doi.org/10.1016/0370-2693(94)91537-7
Autor:
I.T. Drummond
Publikováno v:
Journal of Fluid Mechanics. 252:479-498
We study the stretching and bending of line elements transported in random flows with known Eulerian statistics in two and three dimensions. By making use of a cumulant expansion for the log-size of material elements we are able to analyse the expone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1da30f25e3bcb487af5a137bcc4d329
https://doi.org/10.1017/s0022112093003842
https://doi.org/10.1017/s0022112093003842
Publikováno v:
Scopus-Elsevier
We employ a nonrelativistic version of QCD (NRQCD) to study heavy quark-antiquark bound states in the lowest approximation without fine structure. We use gluon configurations on a 16^3 by 48 lattice at beta=6.2 from the UKQCD collaboration. For quark
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06aa200a8b107821c3b6891f5163bb11
https://doi.org/10.1016/0370-2693(93)91352-n
https://doi.org/10.1016/0370-2693(93)91352-n
Publikováno v:
Scopus-Elsevier
We apply an accelerated Langevin algorithm to the simulation of continous spin models on the lattice. In conjunction with the evolution equation for the spins we use slave equations to compute estimators for the connected correlation functions of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ffb98152a3c7f3ac9bf46ca19ccdab7
https://doi.org/10.1016/0370-2693(92)90444-9
https://doi.org/10.1016/0370-2693(92)90444-9
Autor:
W. Münch, I.T. Drummond
Publikováno v:
Journal of Fluid Mechanics. 225:529-543
Material lines and surfaces transported in a random velocity field undergo bending and stretching. In this paper we investigate the time evolution of curvature in line and surface elements both analytically and by numerical simulation for a simple mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46c9a181d71261fa7c054611e0a1c06e
https://doi.org/10.1017/s002211209100215x
https://doi.org/10.1017/s002211209100215x
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 73:336-338
We present preliminary results for the Upsilon spectrum on an anisotropic lattice using the improved O(mv^6) NRQCD Hamiltonian. We find accurate results can be obtained in moderate computer times and that they agree with earlier results on an isotrop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51bed89198e3d13ebe48d184eb5d062d
https://doi.org/10.1016/s0920-5632(99)85065-8
https://doi.org/10.1016/s0920-5632(99)85065-8