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- Subhasish Basak, Ikuro Sato, Stephen Wallace, Robert Edwards, David Richards, Thomas Jefferson +4 others
- 2006

The effects of Gaussian quark-field smearing and analytic stout-link smearing on the correlations of gauge-invariant extended baryon operators are studied. Gaussian quark-field smearing substantially reduces contributions from the short wavelength modes of the theory, while stout-link smearing significantly reduces the noise from the stochastic evaluations.… (More)

- Thomas Appelquist, George T Fleming, Ethan T Neil
- Physical review letters
- 2008

We study the extent of the conformal window for an SU(3) gauge theory with N{f} Dirac fermions in the fundamental representation. We present lattice evidence for 12<or=N{f}<or=16 that the infrared behavior is governed by a fixed point, while confinement and chiral symmetry breaking are present for N{f}<or=8.

The dynamical N = 1, SU(2) Super Yang-Mills theory is studied on the lattice using a new lattice fermion regulator, domain wall fermions. This formulation even at non-zero lattice spacing does not require fine-tuning, has improved chiral properties and can produce topological zero-mode phenomena. Numerical simulations of the full theory on lattices with the… (More)

- Dong Chen, Ping Chen, Norman H. Christ, Robert G. Edwards, George Fleming, Alan Gara +13 others
- SC
- 1997

We discuss the work of the QCDSP collaboration to build an inexpensive Teraflop scale massively parallel computer suitable for computations in Quantum Chromodynamics (QCD). The computer is a collection of nodes connected in a four dimensional toroidial grid with nearest neighbor bit serial communications. A node is composed of a Texas Instruments Digital… (More)

Dynamical electroweak symmetry breaking (DEWSB) has been a viable option for the completion of the standard model for over thirty years. Precision electroweak studies indicate that the new strong interactions that break EW symmetry cannot be a scaled-up copy of QCD. Building viable models of DEWSB is difficult without a detailed understanding of such… (More)

We discuss the calculation of disconnected diagrams needed for determining the strange quark content of the nucleon on the lattice. We present results for the strange scalar form factor and the related parameter f T s , which enters into the cross-section for the scattering of dark matter off nuclei in supersymmetric extensions of the standard model. In… (More)

- A Poole, R C Brown, G T Fleming
- Environmental health perspectives
- 1983

The cell transforming ability of asbestos dusts was investigated using C3H10T1/2 murine fibroblasts. In a series of experiments, crocidolite and amosite caused no increase in the number of transformed colonies over that seen in cultures from untreated cells. The dusts were, however, capable of augmenting the oncogenic effect of benzo(a)pyrene. This… (More)

We present results from simulations of two flavor QCD thermodynamics at N t = 4 with domain wall fermions. In contrast to other lattice fermion formulations, domain wall fermions preserve the full SU L (N f) ⊗ SU R (N f) symmetry of the continuum at finite lattice spacing (up to terms exponentially small in an extra parameter). Just above the phase… (More)

- Robert G. Edwards, Thomas Jefferson, George T. Fleming, Philipp Hägler, John W. Negele, Kostas Orginos +4 others

Generalized parton distributions encompass a wealth of information concerning the three-dimensional quark and gluon structure of the nucleon, and thus provide an ideal focus for the study of hadron structure using lattice QCD. The special limits corresponding to form factors and parton distributions are well explored experimentally, providing clear tests of… (More)

- Subhasish Basak, Robert G. Edwards, Thomas Jefferson, G. T. Fleming, Keisuke Jimmy Juge, Adam Lichti +9 others
- 2015

Energies for excited isospin I 1 2 and I 3 2 states that include the nucleon and families of baryons are computed using quenched, anisotropic lattices. Baryon interpolating field operators that are used include nonlocal operators that provide G 2 irreducible representations of the octahedral group. The decomposition of spin 5 2 or higher spin states is… (More)