Gauge invariance of fermion masses in extended-technicolor theories

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.R646· OSTI ID:5907822

Appelquist, T ^[1]; Mahanta, U ^[2]; Nash, D ^[3]; Wijewardhana, L C.R. ^[4]

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1. Center for Theoretical Physics and Department of Physics, Yale University, New Haven, Connecticut 06520 (USA)
2. Department of Physics, Purdue University, West Lafayette, Indiana 47907 (USA)
3. Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (USA)
4. Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221 (USA)

It has recently been argued that, in technicolor theories, large quark and lepton masses can arise if the extended-technicolor (ETC) interactions play an important direct role in chiral-symmetry breaking. This happens when the ETC coupling is sufficiently close to a critical value. The analysis that led to these conclusions was based on the study of the renormalization-group-improved ladder Dyson-Schwinger equation. In this paper we investigate the gauge invariance of this ETC-driven fermion-mass enhancement. We show that the critical curve in the ETC, technicolor coupling plane, separating the symmetric and symmetry-breaking phases, is gauge invariant. We then show that the same is true for fermion-mass enhancement.

• DOE Contract Number: AC02-76ER03075; FG02-84ER40153; AC02-76ER01428
• OSTI ID: 5907822
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 43:3; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645300 -- High Energy Physics-- Particle Invariance Principles & Symmetries
645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
COLOR MODEL
COMPOSITE MODELS
COUPLING
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FUNCTIONS
GAUGE INVARIANCE
HIGGS MODEL
INVARIANCE PRINCIPLES
LADDER APPROXIMATION
LEPTONS
MASS
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
PROPAGATOR
QUARK MODEL
QUARKS
RENORMALIZATION
SELF-ENERGY
STANDARD MODEL
SYMMETRY
SYMMETRY BREAKING
UNIFIED GAUGE MODELS
WAVE FUNCTIONS