权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Testing Supersymmetry at Energy-Frontier Colliders

在能源前沿对撞机上测试超对称性

基本信息

批准号：
10640243
负责人：
HIKASA Ken-ichi
金额：
$ 1.15万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640243/
关键词：
Supersymmetry collider physics Higgs boson radiative correction electron-positron collision proton-antiproton collision top quark high energy physics ゲージボソン軸射補正

项目摘要

1. We study three-body decays of charginos in supersymmetry and examine the dependence of the decay rates on the mass of scalar quarks and leptons. We find that a heavy sfermion can influence the rate drastically if the chargino is gaugino-like, even if the two-body decay channel to W is open. Study of the final state leptons and jets will be useful to extract the sfermion mass from the data.2. Supersymmetric relation between coupling constants receive corrections from soft-breaking sfermion masses and may be useful to obation information on very heavy sfermions. We study its effect in chargino pair production in eィイD1+ィエD1eィイD1-ィエD1 annihilation.3. We find that the decay of third-generation sfermions to final states containing a gauge or Higgs boson can have a substantial branching fration.4. Lepton number breaking top quark interaction can appear in R-parity breaking supersymmetric models. We calculate its effect in top pair production at the Tevatron and find that top polarization and forward-backward asymmetry are useful observables to improve the limit on the coupling.5. We study the distribution of lepton pairs in the decay of the second lightest neutralino at the LHC, as a means to determine the mass difference. We find that the distribution is very sensitive to the model parameters.

1.我们研究了超对称性下电荷态的三体衰变，并考察了衰变率对标夸克和轻子质量的依赖性。我们发现，一个沉重的sfermion可以影响率急剧如果chargino是gaugino样，即使两体衰变通道W是开放的。对末态轻子和喷注的研究将有助于从数据中提取sfermion质量.耦合常数之间的超对称关系接受软破缺sfermion质量的修正，可能对超重sfermion的观测信息有用。我们研究了它在e D1+ e D1 e D1-e D1湮灭过程中电荷对产生的影响.我们发现第三代sfermions衰变到包含规范或希格斯玻色子的末态可以有一个相当大的分支分数.在R宇称破缺超对称模型中可以出现轻子数破缺顶夸克相互作用。我们计算了它对兆电子伏特加速器顶部对产生的影响，发现顶部极化和前后不对称性是改善耦合限制的有用观测量。5.我们研究了LHC中第二轻中性伴子衰变中轻子对的分布，作为确定质量差的一种手段。我们发现，分布是非常敏感的模型参数。