Zoltan Fodor

Nearly conformal gauge theories in finite volume

Abstract We report new results on nearly conformal gauge theories with fermions in the fundamental representation of the SU ( 3 ) color gauge group as the number of fermion flavors is varied in the N f = 4 – 16 range. To unambiguously identify the chirally broken phase below the conformal window we apply a comprehensive lattice tool set in finite volumes which includes the test of Goldstone pion dynamics, the spectrum of the fermion Dirac operator, and eigenvalue distributions of random matrix theory. We also discuss the theory inside the conformal window and present our first results on the running of the renormalized gauge coupling and the renormalization group beta function. The importance of understanding finite volume zero momentum gauge field dynamics inside the conformal window is illustrated. Staggered lattice fermions are used throughout the calculations.

Fate of the conformal fixed point with twelve massless fermions and SU(3) gauge group

We report new results on the conformal properties of an important strongly coupled gauge theory, a building block of composite Higgs models beyond the Standard Model. With twelve massless fermions in the fundamental representation of the SU(3) color gauge group, an infrared fixed point (IRFP) of the

QPACE - a QCD parallel computer based on Cell processors

\ensuremath{\beta}

Coherent center domains from local Polyakov loops

-function was recently reported in the theory [A. Cheng, A. Hasenfratz, Y. Liu, G. Petropoulos, and D. Schaich, J. High Energy Phys. 05 (2014) 137] with uncertainty in the location of the critical gauge coupling inside the narrow

Electroweak interactions and dark baryons in the sextet BSM model with a composite Higgs particle

[6.0l{g}_{*}^{2}l6.4]

QCD on the Cell Broadband Engine

interval and widely accepted since as the strongest evidence for a conformal fixed point and scale invariance in the theory with model-building implications. Using the exact same renormalization scheme as the previous study, we show that no fixed point of the

QCD thermodynamics with Wilson fermions

\ensuremath{\beta}

Status of the QPACE Project

-function exists in the reported interval. Our findings eliminate the only seemingly credible evidence for conformal fixed point and scale invariance in the

Lattice Methods in Gauge Theories beyond the Standard Model

{N}_{f}=12

QCD finite T transition Comparison between Wilson and staggered results

model whose infrared properties remain unresolved. The implications of the recently completed 5-loop QCD