Physical spectrum of conformalSU<mml:mn/>(N)<mml:mn/>gauge theories

1998/06/18 by Thomas Appelquist, T. Appelquist, Francesco Sannino +1 · 9 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.59.067702

published as Phys.Rev.D59:067702,1999 · 9 pages, LaTeX

arxiv created 1998/06/18 · openalex publication_date 1999/02/19 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We investigate the physical spectrum of vector-like SU(N) gauge theories with infrared coupling close to but above the critical value for a conformal phase transition. We use dispersion relations, the momentum dependence of the dynamical fermion mass and resonance saturation. We argue that the second spectral function sum rule is substantially affected by the continuum contribution, allowing for a reduction of the axial-vector--vector mass splitting with respect to QCD-like theories. Possible consequences for technicolor theories are described.

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