Thomas Appelquist

Lattice study of the conformal window in QCD-like theories

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.

Universal extra dimensions and the Higgs boson mass

We study the combined constraints on the compactification scale

Lattice study of conformal behavior in SU(3) Yang-Mills theories

1/R

Electroweak chiral Lagrangian and new precision measurements

and the Higgs boson mass

The Physical spectrum of conformal SU(N) gauge theories

{m}_{H}

Proton Stability in Six Dimensions

in the standard model with one or two universal extra dimensions. Focusing on precision measurements and employing the Peskin-Takeuchi S and T parameters, we analyze the allowed region in the

Zero Temperature Chiral Phase Transition in SU(N) Gauge Theories.

{(m}_{H},1/R)

A new constraint on strongly coupled field theories

parameter space consistent with current experiments. For this purpose, we calculate complete one-loop KK mode contributions to S, T, and U, and also estimate the contributions from physics above the cutoff of the higher-dimensional standard model. A compactification scale

Universal extra dimensions and the muon magnetic moment

1/R

Fermion masses and mixing in extended technicolor models

as low as 250 GeV and significantly extended regions of