Dynamics of nou-Iinear Sigma models and their application to the little Higgs models

非线性Sigma模型的动力学及其在小希格斯模型中的应用

• 批准号: 16540226
• 负责人: TANABASHI Masaharu
• 金额: $ 2.37万
• 依托单位: Nagoya University (2007)Tohoku University (2004-2006)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16540226/
• 关键词: beyond-the-standard-models; non-linear sigma models; electroweak precision measurements; chiral perturbation; deconstruction; Higgsless models; unitarity; カルッツァ・クライ; 輻射補正; 余剰次元; ヒッグスレス; ブロックスピン変換; 等価定理; 素粒子論; 対称性の破れ; ヒグス; ヒグスレス模型; 精密測定

It is widely believed that certain "physics beyond the standard modal" should exist above the TeV scale. These beyond the-standard models(BSM)include various Technicolor models and supeisymmetric model Among them, QCD-lice Technicolor models have been ruled out almost completely by precision measurements of W and Z bosons at LET and Tevatron. Also, we have never observed SUSY partner particles as predicted in SUSY models.Recently, new type of ESM, such as the lithe Higgs models and the deconstructed Higgsless models, has been proposed. There models ale based on the non-linear sigma models, and are thus non-renormalizable. It is therefore quite difficult to analyze these modals including their radiative corrections.In this study, from a viewpoint of chiral perturbation theory, we performed a comprehensive analysis on these BSM non-linear sigma models For Higgsless models, we lurid that 1) in any unitary theory, Higgsless models with localized fermion am disfavored by precision electroweak data, 2) it is possible to construct phenomenologically viable Higgsless models once we allow the fermion delocalization, 3) assuming ideal fermion delocalization" deviations in electroweak precision parameters axe minimized, 4) the current constraint on these “ideal fermion delocalization" Higgsless models comes from the measurement of the triple gauge boson vertices We also perfumed a systematic next order evaluation in the chiral perturbation analysis including the radiative corrections in these models.

人们普遍认为，某些“超越标准模态的物理学”应该存在于TeV尺度之上。这些超标准模型（BSM）包括各种Technicolor模型和超对称模型，其中QCD-lice Technicolor模型已被LET和Tevatron上W和Z玻色子的精确测量几乎完全排除。近年来，人们提出了新的ESM模型，如轻盈的Higgs模型和解构的Higgsless模型。这些模型是基于非线性sigma模型的，因此是不可重正化的。本文从手征微扰理论的角度出发，对BSM非线性σ模型进行了全面的分析。对于无Higgsless模型，我们发现：1）在任何幺正理论中，具有局域费米子的无Higgsless模型都不适合于精确的电弱数据，2）一旦我们允许费米子离域，就有可能构造唯象可行的无希格斯模型，3）假设理想费米子离域的电弱精确参数的偏差最小，（4）这些“理想费米子离域”的无Higgsless模型目前的约束来自于三重规范玻色子顶点的测量我们还对这些模型的手征微扰分析进行了系统的次阶估计，包括辐射修正。

项目成果

Ideal fermion delocalization in five dimensional gauge theories

五维规范理论中的理想费米子离域

• 发表时间: 2005
• 期刊: Physical Review 72
• 作者: R. S. Chivukula;E. H. Simmons;H;J. He;M. Kurachi;M. Tanabashi
• 通讯作者: M. Tanabashi

Generalized Weinberg sum rules in deconstructed QCD

• DOI: 10.1088/1126-6708/2004/06/004
• 发表时间: 2004-03
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: R. Chivukula;M. Kurachi;M. Tanabashi

Multi-gauge-boson vertices and chiral Lagrangian parameers in Higgsless models with ideal fermion delocalization

具有理想费米子离域的希格斯无模型中的多规范玻色子顶点和手性拉格朗日参数

• 发表时间: 2005
• 期刊: Phys.Rev D72, 075012
• 作者: R. S. Chivukula;E. H. Simmons;H. J. He;M. Kurachi;M. Tanabashi
• 通讯作者: M. Tanabashi

A Three site Higgsless model

• DOI: 10.1103/physrevd.74.075011
• 发表时间: 2006-07
• 期刊: Physical Review D
• 影响因子: 5
• 作者: R. Chivukula;Baradhwaj Coleppa;S. Chiara;E. Simmons;H. He;M. Kurachi;M. Tanabashi

Deconstruction and elastic {pi}{pi} scattering in Higgsless models

• DOI: 10.1103/physrevd.75.035005
• 发表时间: 2006-12
• 期刊: Physical Review D
• 影响因子: 5
• 作者: R. Chivukula;E. Simmons;H. He;M. Kurachi;M. Tanabashi