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Filters: Format: "application/pdf" Collection: "ir_uspace" Subject: "Wilson quarks"
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CreatorTitleDescriptionSubjectDate
1 DeTar, CarletonContinuum limit in the quenched approximationPrevious work at G/g2 = 5.7 with quenched staggered quarks is extended with new calculations at 5.85 and 6.15 on lattices up to 323 x 64. These calculations allow a more detailed study of extrapolation in quark mass, finite volume and lattice spacing than has heretofore been possible. We discuss h...Decay constants; Staggered quarks; Wilson quarks1996-03
2 DeTar, CarletonExotic hybrid mesons from improved Kogut-Susskind fermionsWe summarize our measurement of the mass of the exotic 1−+ hybrid meson using an improved Kogut-Susskind action. We show results from both quenched and dynamical quark simulations and compare with results from Wilson quarks. Extrapolation of these results to the physical quark mass allows compar...Chromomagnetic field; Kogut-Susskind fermions; Wilson quarks2003-05
3 DeTar, CarletonExotic hybrid mesons with light quarksHybrid mesons, made from a quark, an antiquark and gluons, can have quantum numbers inaccessible to conventional quark-antiquark states. Confirmation of such states would give information on the role of "dynamical" color in low energy QCD. We present preliminary results for hybrid meson masses using...Hybrid mesons; Kogut-Susskind quarks; Wilson quarks1997-02
4 DeTar, CarletonfB quenched and unquenchedResults for fβ, / fβs, /fD, /fDs , and their ratios are presented. High statistics quenched runs at β = 5.7, 5.85, 6.0, and 6.3, plus a run still in progress at β = 6.52 make possible a preliminary extrapolation to the continuum. The data allows good control of all systematic errors except for q...Decay constants; Wilson quarks1996-03
5 DeTar, CarletonFinite temperature lattice QCD with clover fermionsWe report on our simulation of finite temperature lattice QCD with two flavors of O(a) Symanzik-improved fermions and O(a2) Symanzik-improved glue. Our thermodynamic simulations were performed on an 83 × 4 lattice, and we have performed complementary zero temperature simulations on an 83 × 16 la...Wilson quarks; Clover fermions1997-02
6 DeTar, CarletonHeavy-light decay constants with dynamical gauge configurations and Wilson or improved valence quark actionsWe describe a calculation of heavy-light decay constants including virtual quark loop effects. We have generated dynamical gauge configurations at three _x000C_ values using two flavors of Kogut-Susskind quarks with a range of masses. These are analyzed with a Wilson valence quark action. Prelimin...Decay constants; Kogut-Susskind quarks; Wilson quarks; Fat-clover valence quarks2000-04
7 DeTar, CarletonLattice calculation of heavy-light decay constants with two flavors of dynamical quarksWe present results for f B , f Bs , f D , f Ds and their ratios in the presence of two flavors of light sea quarks (Nf52). We use Wilson light valence quarks and Wilson and static heavy valence quarks; the sea quarks are simulated with staggered fermions. Additional quenched simulations with nonpe...Wilson quarks; Chiral perturbation2002-11
8 DeTar, CarletonLattice results for the decay constant of heavy-light vector mesonsWe compute the leptonic decay constants of heavy-light vector mesons in the quenched approximation. The reliability of lattice computations for heavy quarks is checked by comparing the ratio of vector to pseudoscalar decay constant with the prediction of heavy quark effective theory in the limit o...Heavy quark effective theory; Wilson quarks2001-12
9 DeTar, CarletonLight hadron spectrum - MILC results with the Kogut-Susskind and Wilson actions*We present the current status of our ongoing calculations of the light hadron spectrum with both Kogut-Susskind (KS) and Wilson quarks in the valence or quenched approximation. We discuss KS quarks first and find that the chiral extrapolation is potentially the biggest source of systematic error. F...Staggered quarks; Hadron spectrum; Kogut-Susskind quarks; Wilson quarks; Chiral extrapolation1998-01
10 DeTar, CarletonNature of the thermal phase transition with Wilson quarksWe describe a series of simulations of high temperature QCD with two flavors of Wilson quarks aimed at clarifying the nature of the high temperature phase found in current simulations. Most of our work is with four time slices, although we include some runs with six and eight time slices for compar...Wilson quarks; Landau gauge; Polyakov loop; Phase transitions1994-04
11 DeTar, CarletonPreliminary heavy-light decay constants from the MILC collaborationPreliminary results from the MILC collaboration for fβ, / fβs, /fD, /fD„ and their ratios are presented. We compute in the quenched approximation at β = 6.3, 6.0 and 5.7 with Wilson light quarks and static and Wilson heavy quarks. We attempt to quantify all systematic errors other than quenchin...Decay constants; Wilson quarks1995-04
12 DeTar, CarletonQCD thermodynamics with two flavors of Wilson quarks at Nt=6We report on a study of hadron thermodynamics with two flavors of Wilson quarks on 123 X6 lattices. We have studied the crossover between the high- and low-temperature regimes for three values of the hopping parameter, K=0. 16, 0.17, and 0.18. At each of these values of K we have carried out spect...Wilson quarks; Staggered quarks; Chiral symmetry; Phase transitions1992-11
13 DeTar, CarletonQCD thermodynamics with Wilson quarks at large KWe extend our study of the high temperature transition with two flavors of Wilson quarks on 123 x 6 lattices to K = 0.19. We also perform spectrum calculations on 123 x 24 lattices at K = 0.19 to find the physical lattice spacing and quark mass. At this value of K the transition is remarkable in tha...Wilson quarks; Polyakov loop; Phase transitions1994-09
14 DeTar, CarletonQuark loop effects in semileptonic form factors for heavy-light mesonsWe present preliminary results of a determination of the semileptonic form factor for the decay of pseudoscalar heavy-light mesons to pseudoscalar light-light mesons in full QCD. In this preliminary study we focus on the effects of dynamical quark loops. Accordingly, we compare results of simulati...Semileptonic decay; Form factors; Quark loops; Wilson quarks2004-03
15 DeTar, CarletonThermal phase transition in mixed action SU(3) lattice gauge theory and Wilson fermion thermodynamicsWe study the thermal phase diagram of pure SU(3) lattice gauge theory with fundamental and adjoint couplings. We improve previous estimates of the position of the bulk transition line and determine the thermal deconfinement transition lines for Nt = 2, 4, 6, and 8. The endpoint of the bulk transitio...Wilson fermions; Wilson quarks; Phase transitions; Demon algorithms1995-05
16 DeTar, CarletonUpdate on fBWe describe the current status of the MILC collaboration computation of fB, fBs , fD, fDs and their ratios. Progress over the past year includes: better statistics and plateaus at _x000C_β = 6.52 (quenched), β_x000C_ = 5.6 (NF = 2) and β_x000C_ = 5.445 (NF = 2), new runs with a wide range of dyn...Decay constants; Wilson quarks1997-02
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