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Study of precise measurements of Higgs in linear collider

直线对撞机希格斯粒子精确测量研究

基本信息

批准号：
17540283
负责人：
ISHIKAWA Tadashi
金额：
$ 2.24万
依托单位：
High Energy Accelerator Research Organization
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

1. One of the most important goals of the International Linear Collider experiments is the detailed study of Higss particle. With the high-statistics data from devoted efforts by experimentalists, precise theoretical calculations are mandatory. We calculated the full electroweak radiative corrections for Higgs potential in the high energy region using the automated system (GRACE) for the perturbative computation. The calculated weak correction in Gμ scheme is small, less than 5% for > 600GeV. In order to confirm the results, we have made the comparison between ZHH channel and vμvμHH channel, and also the estimation of the weak correction by assuming the dominance of W W -> HH mechanism.2. We present the renormalization scheme used in and the characteristic features of GRACE/SUSY-loop, the package of the program for the automatic calculation of the minimal supersymmetric standard model processes including one-loop order corrections. The two-body and three-body decay widths of charginos in one-loop order evaluated by GRACE/SUSY-loop are shown.3. The control of the numerical precision of large-scale computations like those generated by the GRACE system for automatic Feynman diagram calculations has become an instrinsic part of those packages. We tested the 1-loop radiative correction to electron positron tau anti-tau production in electon positron collider, using quadruple and octuple precision arithmetic library where the number of lost-bits is made available.4. We developed the program which generated FORM sources for its symbolic manipulation. This enables us the efficient memory management that is essential for the handling of a tremendous number of Feynman diagrams, so that the performance is significantly improved.

1. 国际直线对撞机实验最重要的目标之一是对希格斯粒子的详细研究。由于实验人员付出了巨大的努力得到了高统计数据，因此必须进行精确的理论计算。我们使用自动系统（GRACE）进行微扰计算，计算了高能区希格斯势的全电弱辐射修正。Gμ格式下计算的弱校正很小，> 600GeV小于5%。为了验证结果，我们对ZHH通道和vμvμHH通道进行了比较，并在假设ww -> HH机制占主导地位的情况下，对弱校正进行了估计。本文介绍了包含单环阶修正的最小超对称标准模型过程自动计算程序包GRACE/SUSY-loop所采用的重整化方案及其特点。用GRACE/SUSY-loop计算了单环阶电荷的二体和三体衰变宽度。对大规模计算的数值精度控制，如由GRACE系统生成的自动费曼图计算，已经成为这些软件包的固有组成部分。在电子-正电子对撞机中，我们使用四元和八元精度算法库测试了对电子-正电子-反-tau产生的1环辐射校正。我们开发了一个程序来生成FORM的符号操作源。这使我们能够进行有效的内存管理，这对于处理大量的费曼图是必不可少的，因此性能得到了显着提高。

项目成果

期刊论文数量（19）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

素粒子反応計算の自動化

基本粒子反应计算的自动化

DOI：
发表时间：
2007
期刊：
日本物理学会誌 62
影响因子：
0
作者：
土谷暁人;寺尾治彦;栗原良将他
通讯作者：
栗原良将他

Electroweak corrections for the study of the Higgs potential at the LC

用于研究液晶希格斯势的电弱校正

DOI：
发表时间：
2006
期刊：
Proceedings of 2005 International Linear Coillider Workshop (To be appeared)
影响因子：
0
作者：
土谷暁人;寺尾治彦;栗原良将他;J.Fujimoto et al.;Y.Kurihara;J.Fujimoto et al.;栗原良将他;K.Kato et al.;J.Fujimoto et al.;J.Fujimoto et al.;J.Fujimoto et al.;K.Kato;J.Fujimoto et al.;J.Fujimoto et al.;J.Fujimoto et al.;J.Fujimoto et al.;Y.Kurihara et al.;K.Kato et al.;J.Fujimoto et al.;J.Fujimoto et al.;F.Boudiema et al.
通讯作者：
F.Boudiema et al.

Two-body and three-body decays of charginos in one-loop order in the MSSM

MSSM 中单环顺序的 charginos 的二体和三体衰变