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Title: Electroweak symmetry breaking by vectorlike fermion condensation with small {ital S} and {ital T} parameters

Abstract

In order to build realistic models in which electroweak symmetry is dynamically broken we should explain the smallness of the Peskin-Takeuchi {ital S} and {ital T} parameters. In accordance with the decoupling theorem, these parameters must be suppressed by SU(2){sub {ital L}}{times}U(1){sub {ital Y}} invariant masses. From this fact we can expect that if fermions with large SU(2){sub {ital L}}{times}U(1){sub {ital Y}} invariant masses undergo condensation and break electroweak symmetry, the {ital S} and {ital T} parameters can be small. It is intersting that not only the {ital S} but also the {ital T} parameter can become small even if there exists a large isospin violation in fermion condensation. In this paper we examine the possibility that, by the strong four-Fermi interaction, massive vectorlike fields undergo condensation and break electroweak symmetry. The model becomes almost the same as the standard model at a low energy scale and predicts a heavy Higgs boson. Moreover, we discuss a model in which the four-Fermi interaction can be induced by massive gauge boson exchange. In this model, the masses of ordinary matter fermions (quark and lepton) are enhanced.

Authors:
 [1]
  1. Department of Physics, Tohoku University, Sendai 980 (Japan)
Publication Date:
OSTI Identifier:
76540
Resource Type:
Journal Article
Journal Name:
Physical Review, D
Additional Journal Information:
Journal Volume: 52; Journal Issue: 3; Other Information: PBD: 1 Aug 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; WEAK INTERACTIONS; SYMMETRY BREAKING; ELECTROMAGNETIC INTERACTIONS; FERMIONS; CONDENSATES; SU-2 GROUPS; U-1 GROUPS; MASS; ISOSPIN; HIGGS BOSONS

Citation Formats

Maekawa, N. Electroweak symmetry breaking by vectorlike fermion condensation with small {ital S} and {ital T} parameters. United States: N. p., 1995. Web. doi:10.1103/PhysRevD.52.1684.
Maekawa, N. Electroweak symmetry breaking by vectorlike fermion condensation with small {ital S} and {ital T} parameters. United States. doi:10.1103/PhysRevD.52.1684.
Maekawa, N. Tue . "Electroweak symmetry breaking by vectorlike fermion condensation with small {ital S} and {ital T} parameters". United States. doi:10.1103/PhysRevD.52.1684.
@article{osti_76540,
title = {Electroweak symmetry breaking by vectorlike fermion condensation with small {ital S} and {ital T} parameters},
author = {Maekawa, N},
abstractNote = {In order to build realistic models in which electroweak symmetry is dynamically broken we should explain the smallness of the Peskin-Takeuchi {ital S} and {ital T} parameters. In accordance with the decoupling theorem, these parameters must be suppressed by SU(2){sub {ital L}}{times}U(1){sub {ital Y}} invariant masses. From this fact we can expect that if fermions with large SU(2){sub {ital L}}{times}U(1){sub {ital Y}} invariant masses undergo condensation and break electroweak symmetry, the {ital S} and {ital T} parameters can be small. It is intersting that not only the {ital S} but also the {ital T} parameter can become small even if there exists a large isospin violation in fermion condensation. In this paper we examine the possibility that, by the strong four-Fermi interaction, massive vectorlike fields undergo condensation and break electroweak symmetry. The model becomes almost the same as the standard model at a low energy scale and predicts a heavy Higgs boson. Moreover, we discuss a model in which the four-Fermi interaction can be induced by massive gauge boson exchange. In this model, the masses of ordinary matter fermions (quark and lepton) are enhanced.},
doi = {10.1103/PhysRevD.52.1684},
journal = {Physical Review, D},
number = 3,
volume = 52,
place = {United States},
year = {1995},
month = {8}
}