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- Robert G. Edwards, George T. Fleming, +6 authors Wolfram Schroers
- 2005

(LHPC Collaboration) Thomas Jefferson National Accelerator Facility, Newport News, VA 23606 Sloane Physics Laboratory, Yale University, New Haven, CT 06520 Department of Physics and Astronomy, Vrije Universiteit, 1081 HV Amsterdam, NL Current affiliation: Institut für Theoretische Physik, TU München, D-85747 Garching, Germany Center for Theoretical Physics,… (More)

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)

- Thomas Appelquist, Ronald Babich, +11 authors Pavlos Vranas
- Physical review letters
- 2011

We describe a lattice simulation of the masses and decay constants of the lowest-lying vector and axial resonances, and the electroweak S parameter, in an SU(3) gauge theory with N(f)=2 and 6 fermions in the fundamental representation. The spectrum becomes more parity doubled and the S parameter per electroweak doublet decreases when N(f) is increased from… (More)

- Thomas Appelquist, Adam Avakian, +11 authors Pavlos Vranas
- Physical review letters
- 2010

We study the chiral properties of an SU(3) gauge theory with N{f} massless Dirac fermions in the fundamental representation when N{f} is increased from 2 to 6. For N{f}=2, our lattice simulations lead to a value of psi psi/F{3}, where F is the Nambu-Goldstone-boson decay constant and psi psi is the chiral condensate, which agrees with the measured QCD… (More)

- Thomas Appelquist, Richard C. Brower, +14 authors Joseph Wasem
- 2013

T. Appelquist,1 R. C. Brower,2 M. I. Buchoff,3 M. Cheng,4 S. D. Cohen,4 G. T. Fleming,1 J. Kiskis,5 M. F. Lin,1 E. T. Neil,6 J. C. Osborn,7 C. Rebbi,2 D. Schaich,8 C. Schroeder,3 S. Syritsyn,9 G. Voronov,1 P. Vranas,3 and J. Wasem3 (Lattice Strong Dynamics (LSD) Collaboration) 1Department of Physics, Sloane Laboratory, Yale University, New Haven,… (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.

- Subhasish Basak, Ikuro Sato, +7 authors Adam Lichtl
- 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)

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)

Ronald Babich∗ , a Richard Brower,ab Michael Clark,b George Fleming,c James Osborn,d and Claudio Rebbiab aDepartment of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA bCenter for Computational Science, Boston University, 3 Cummington Street, Boston, MA 02215, USA cDepartment of Physics, Yale University, New Haven, CT 06520, USA… (More)

To calculate the matrix elements relevant to CP violation in Kaon decays it is important to use a lattice formulation which preserves (some) chiral symmetry. In the case of BK , B (3/2) 7 , and B (3/2) 8 , the absence of chiral symmetry leads to mixing with wrong chirality operators, which in turn leads to large discretization errors. The problem is far… (More)