85 citations · 657 across the 26 of their papers we have counts for
24 papers · 1 filter
Scaling and Further Tests of Heavy Meson Decay Constant Determinations from Nonrelativistic QCD
S. Collins, C. T. H. Davies, J. Hein +4
We present results for the B_s meson decay constant f_{B_s} from simulations at three lattice spacings in the range a^{-1}=1.1 to 2.6 GeV using NRQCD heavy quarks and clover light…
Reply to Isgur's Comments on Valence QCD
K. F. Liu, S. J. Dong, T. Draper +3
We reply to Nathan Isgur's critique that is directed at some of the conclusions drawn from the lattice simulation of valence QCD, regarding the valence quark model and effective ch…
Heavy-light Mesons and Baryons with b quarks
A. Ali Khan, T. Bhattacharya, S. Collins +5
We present lattice results for the spectrum of mesons containing one heavy quark and of baryons containing one or two heavy quarks. The calculation is done in the quenched approxim…
Semi-leptonic decays heavy-light to heavy light
J. Hein, P. Boyle, C. T. H. Davies +2
We present results for the QCD matrix elements involved in semi-leptonic decays of B-mesons into pseudo scalar heavy light states. The application of NRQCD heavy quarks allows for…
A Noisy Monte Carlo Algorithm
L. Lin, K. F. Liu, J. Sloan
We propose a Monte Carlo algorithm to promote Kennedy and Kuti's linear accept/reject algorithm which accommodates unbiased stochastic estimates of the probability to an exact one.…
Sea quark effects in B Spectroscopy and Decay Constants
S. Collins, C. T. H. Davies, U. M. Heller +4
We present comprehensive results for the spectrum and decay constants of hadrons containing a single b quark. The heavy quark is simulated using an NRQCD action and the li…
An Improvement to the Linear Accept/Reject Algorithm
L. Lin, K. F. Liu, J. Sloan
We study the improvement of Kennedy-Kuti's linear accept/reject algorithm with different ordering criterion and modified Bhanot-Kennedy estimator of to reduce probability-…
B Meson Decay Constants From NRQCD
A. Ali Khan, T. Bhattacharya, S. Collins +5
We present quenched results for B meson decay constants using NRQCD b quarks and O(a) tadpole improved clover light quarks. For the first time, one-loop matching factors between la…
Moving NRQCD
John Sloan
I discuss the derivation and applications of Moving NRQCD (MNRQCD), a generalization of NRQCD which allows the treatment of heavy quarks moving with a finite velocity. This formali…
SCRI Results With the Tadpole-Improved Clover Action
Sara Collins, Robert G. Edwards, Urs. M. Heller +1
We compare light hadron spectroscopy using the Wilson and Clover fermionic actions. We show that a Clover coefficient chosen using tadpole-improved tree-level perturbation theory e…
Heavy-Light Mesons with Quenched Lattice NRQCD: Results on Decay Constants
A. Ali Khan, J. Shigemitsu, S. Collins +3
We present a quenched lattice calculation of heavy-light meson decay constants, using non-relativistic (NRQCD) heavy quarks in the mass region of the quark and heavier, and clo…
Further Precise Determinations of from Lattice QCD
C. T. H. Davies, K. Hornbostel, G. P. Lepage +3
We present a new determination of the strong coupling constant from lattice QCD simulations. We use four different short-distance quantities to obtain the coupling, three different…
Reducing Discretization Errors in Lattice QCD Spectroscopy
Sara Collins, R. G. Edwards, U. M. Heller +1
The improved Wilson quark action - the clover action - is constructed to have smaller discretization errors than the normal Wilson quark action. We test this in a quenched spectros…
Latest Results from the SGO Collaboration
S. Collins, U. M. Heller, J. Sloan +3
We present results for the spectrum and decay constants of B mesons from NRQCD using dynamical configurations at with two flavours of staggered fermions. The light quarks a…
Comparing Wilson and Clover Quenched Spectroscopy with an Improved Gauge Action
Sara Collins, Robert G. Edwards, Urs M. Heller +1
We present results of quenched hadron spectroscopy comparing $\order(a)$ improved Wilson (Clover) fermions with conventional Wilson fermions. The configurations were genera…
Decay Constants from NRQCD with Dynamical Fermions
S. Collins, U. M. Heller, J. Sloan +3
We present a lattice investigation of the heavy-light meson decay constants using Wilson light quarks and NRQCD heavy quarks, partially including the effects of dynamical sea quark…
Spectroscopy from NRQCD with Dynamical Fermions
S. Collins, U. M. Heller, J. Sloan +3
We present a lattice investigation, partially including the effects of dynamical quarks, of the heavy-light mesons using NRQCD for the heavy quark and the Wilson action for the lig…
A Comparison of Clover and Wilson Spectroscopy in the Presence of Dynamical Quarks
Sara Collins, Robert G. Edwards, Urs M. Heller +1
We present preliminary results of light hadron spectroscopy using valence, tadpole-improved, Clover fermions on an ensemble of gauge configurations generated with 2 flavors of stag…
Upsilon and J/Psi Spectroscopy Using Clover Fermions in the Presence of Dynamical Quarks
Sara Collins, Robert G. Edwards, Urs M. Heller +1
We calculate spin averaged splittings in the bottomonium and charmonium systems using the clover action. We compare static and kinetic masses of heavy-heavy and heavy-light mesons…
The Heavy-Light Spectrum from Lattice NRQCD
A. Ali Khan, C. T. H. Davies, S. Collins +2
We present a lattice investigation of heavy-light mesons in the quenched approximation, using non-relativistic QCD for the heavy quark and a clover improved Wilson formulation for…
Quenched hadron spectroscopy using improved fermionic and gauge actions
Sara Collins, Robert G. Edwards, Urs M. Heller +1
We present results of quenched hadron spectroscopy using $\order(a)$ improved Wilson fermions. The configurations were generated using an $\order(a^2)$ improved 6-link $SU(…
Latest Results from Heavy Quark Simulations
John Sloan
The status of b-bbar and c-cbar calculations, numerical and analytic, are reviewed. The extraction of alpha_s and quark masses from spectrum calculations is discussed. The NRQCD an…
A New Determination of M_b Using Lattice QCD
C. T. H. Davies, K. Hornbostel, A. Langnau +5
Recent results from lattice QCD simulations provide a realistic picture, based upon first principles, of~ physics. We combine these results with the experimentally measured mass…
Global Demons in Field Theory : Critical Slowing Down in the Xy Model
Dimitri Kusnezov, John Sloan
We investigate the use of global demons, a `canonical dynamics', as an approach to simulating lattice regularized field theories. This deterministically chaotic dynamics is non-loc…