ID 31863
本文ファイル
別タイトル
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
著者
吉川 直志
NDC
物理学
抄録(英)
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
言語
英語
NII資源タイプ
学位論文
広大資料タイプ
学位論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
ETD
権利情報
Copyright(c) by Author
関連情報(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
関連情報URL(references)
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
学位記番号
甲第1434号
授与大学
広島大学(Hiroshima University)
学位名
博士(理学)
学位名の英名
Physical Science
学位の種類の英名
doctoral
学位授与年月日
1996-03-26
部局名
理学研究科