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Filters: Collection: "ir_uspace" Subject: "Decay constants"
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CreatorTitleDescriptionSubjectDate
1 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
2 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
3 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
4 DeTar, CarletonLeptonic decay constants fDs and fD in three flavor lattice QCDWe determine the leptonic decay constants fDs and fD in three flavor unquenched lattice QCD. We use O(a2)-improved staggered light quarks and O(a)-improved charm quarks in the Fermilab heavy quark formalism. Our preliminary results, based upon an analysis at a single lattice spacing, are fDs = 263+5...Decay constants2005-03
5 DeTar, CarletonHeavy-light decay constants using clover valence quarks and three flavors of dynamical improved staggered quarksStarting in 2001, the MILC Collaboration began a large scale calculation of heavy-light meson decay constants using clover valence quarks on ensembles of three flavor configurations. For the coarse configurations, with a = 0.12 fm, eight combinations of dynamical light and strange quarks have been ...Decay constants; Clover valence quarks; Staggered quarks2005-03
6 DeTar, CarletonHeavy-light decay constants with three dynamical flavorsWe present preliminary results for the heavy-light leptonic decay constants in the presence of three light dynamical flavors. We generate dynamical configurations with improved staggered and gauge actions and analyze them for heavy-light physics with tadpole improved clover valence quarks. When th...Leptonic decay; Decay constants2002-03
7 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
8 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
9 DeTar, Carletonf B for various actions: approaching the continuum limit with dynamical fermionsWe present results for pseudoscalar decay constants of heavy-light mesons using both quenched and Nf = 2 dynamical fermion configurations. A variety of fermion actions is investigated: Wilson, nonperturbative clover, and fat-link clover. For heavy quarks the Fermilab formalism is applied. In the q...Decay constants; Wilson fermions2001-03
10 DeTar, CarletonHeavy-light decay constants: conclusions from the Wilson actionWe report on the results of a MILC collaboration calculation of fB, fBs , fD, fDs and their ratios. We discuss the most important errors in more detail than we have elsewhere.Decay constants; Wilson action; Staggered quarks1999-03
11 DeTar, CarletonAssorted weak matrix elements involving the bottom quarkAs part of a larger project to estimate the fB decay constant, we are recalculating fstatic B using a variational smearing method in an effort to improve accuracy. Preliminary results for the static BB parameter and HQET two point functions are also presented.Bottom quark; Decay constants; HQET; Effective field theory1997-02
12 DeTar, CarletonSemileptonic decays of heavy mesons with the fat clover actionWe are studying a variety of semileptonic decays of heavy-light mesons in an effort to improve the determination of the heavy-quark Standard-Model CKM matrix elements. Our fermion action is a novel, improved "fat" clover action that promises to reduce problems with exceptional configurations. Dynami...Semileptonic decay; Decay constants; Staggered quarks; Fat-clover valence quarks2000-04
13 DeTar, CarletonHeavy-light decay constants - MILC results with the Wilson actionWe present the current status of our ongoing calculations of pseudoscalar meson decay constants for mesons that contain one light and one heavy quark (fB, fBs , fD, fDs ). We are currently generating new gauge configurations that include dynamical quarks and calculating the decay constants. In add...Decay constants; Wilson action; Kogut-Susskind quarks; Staggered quarks; Chiral extrapolation1998-01
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