ID 31863
file
title alternative
厳密なカストディアル対称性をもたないテクニカラー模型におけるオブリーク補正とノン-オブリーク補正
creator
Yoshikawa, Tadashi
NDC
Physics
abstract
We discuss whether there is a realistic Technicolor model under the constraints of Oblique and Non-oblique corrections from the precision measurements. To satisfy t he constraint of oblique correct ion. a one-family Technicolor model without exact custodial symmetry was proposed by Appelquist and Terning. We construct effective Lagrangian including technimesolls for the one-family Technicolor model without exact custodial symmetry. Tree level contributions to oblique correction parameters and S and U due to spin 1 technimesons are computed with the effective Lagrangian. An isospin breaking term which is associated with technilepton vector mesons gives a negative contribution to the electroweak radiative correction parameter S due to mixing between I = 0 and I = 1 vector mesons.

To satisfy the constraint of non-oblique correction. Zbb vertex correction the effects of diagonal extended technicolor interaction was studied by Wu. By means of the effective lagrangian approach, we discuss the effects of extended technicolor(ETC) gauge interaction to the oblique and non-oblique corrections. It is shown that the T parameter is unacceptably large whentlie Zbb vertex correction and S parameter are consistent with the experiments in the ETC model. Hence, some difficulty is still remained in the ETC mechanism.
SelfDOI
language
eng
nii type
Thesis or Dissertation
HU type
Doctoral Theses
DCMI type
text
format
application/pdf
text version
ETD
rights
Copyright(c) by Author
relation references
1 Effective Lagrangian for a Technicolor Model without Exact Custodial Symmetry, T. Yoshikawa, H. Takata and T. Morozuini, Prog. Theor. Phys. 92 (1994) 353.
2 The Vertex Corrections in Technicolor Model without Exact Custodial Symmetry, T. Yoshikawa, Mod. Phys. Lett. A10 (1995) 1601.
3 The Oblique corrections from The Diagonal ETC Interaction, T. Yoshikawa, Accepted for publication in Phys. Lett. B
relation references URL
http://dx.doi.org/10.1143/PTP.92.353
http://dx.doi.org/10.1142/S0217732395001721
http://dx.doi.org/10.1016/0370-2693(95)01513-2
grantid
甲第1434号
degreeGrantor
広島大学(Hiroshima University)
degreename Ja
博士(理学)
degreename En
Physical Science
degreelevel
doctoral
date of granted
1996-03-26
department
Graduate School of Science