Does the three site Higgsless model survive the electroweak precision tests at loop?

Journal Article · Mon Sep 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.055020· OSTI ID:21250769

Abe, Tomohiro; Tanabashi, Masaharu ^[1]; Matsuzaki, Shinya ^[2]

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1. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
2. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599 (United States)

We complete the list of one-loop renormalization group equations and matching conditions relevant for the computation of the electroweak precision parameters S and T in the three site Higgsless model. We obtain one-loop formulas for S and T expressed in terms of physical observables such as the Kaluza-Klein (KK) gauge boson mass M{sub W{sup '}}, the KK fermion mass M, and the KK gauge boson (W{sup '}) couplings with light quarks and leptons g{sub W{sup '}}{sub ff}. It is shown that these physical observables, M{sub W{sup '}}, M, and g{sub W{sup '}}{sub ff} are severely constrained by the electroweak precision data. Unlike the tree level analysis on the ideally delocalized fermion, we find that perfect fermiophobity of W{sup '} is ruled out by the precision data. We also study the cutoff dependence of our analysis. Although the model is nonrenormalizable, the dependence on the cutoff parameter {lambda} is shown to be nonsignificant.

• OSTI ID: 21250769
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CALCULATION METHODS
COUPLING
D QUARKS
EQUATIONS
FERMIONS
HIGGS MODEL
KALUZA-KLEIN THEORY
LEPTONS
MASS
RENORMALIZATION
U QUARKS
WEINBERG-SALAM GAUGE MODEL