项目名称: B介子衰变中的超对称效应研究
项目编号: No.U1204113
项目类型: 联合基金项目
立项/批准年度: 2013
项目学科: 物理学II
项目作者: 徐元国
作者单位: 信阳师范学院
项目金额: 30万元
中文摘要: B介子衰变研究对粒子物理标准模型的精确检验和超出标准模型的新物理探寻有着非常重要的作用。随着欧洲大型强子对撞机LHC和美国费米实验室Tevatron Run II等实验上更多更精确的数据收集,为B物理的深入研究提供了前所未有的机会。超对称模型是满足弱电数据的新物理模型中最有希望的新物理模型之一。本项目将紧密结合国际上B介子衰变的实验进展,抓住实验结果和标准模型理论预言之间的一些新冲突,用QCD因子化方法和软共线有效理论等不同计算方法,在不同的超对称模型中寻找可能的解决方案。计算相关B介子衰变过程中的超对称贡献,分析超对称贡献对一些物理量的影响,并寻找一些对超对称效应比较敏感的过程,为实验上寻找超对称信号提供有效的分析和论证。针对一些对超对称贡献敏感的标志性过程,我们将比较几种超对称模型效应的异同,为区分不同的超对称模型提供理论参考。
中文关键词: 重味介子衰变;标准模型;新物理;超对称;
英文摘要: The B meson decays play very important roles in investigating the standard model of particle physics and search for new physics beyond it. With more accurate data collection at the Large Hadron Collider and Fermilab Tevatron Run II, the opportunity for furthering study of B physics never been more promising. Among those new physics models that survived electroweak data, one of the most respectable options is the supersymmetry. This project will work closely with the progress of the international B decay experiments, focus on the new conflicts between experimental results and the standard model predictions in B decays, and search for possible solutions in different supersymmetric models by using QCD factorization and soft collinear effective theory. We will caculte the supersymmetric contributions to ralevant B decays, analyse their effects on the observables, and explore the sensitive processes to supersymmetric effects, thus provide effective analyses and arguments for searching for supersymmetric signals in the experiment. For some special processes, we will compared the effects in several different supersymmetric models, and then provide valuable theortical references for distinguishing different supersymmetric models.
英文关键词: heavy flavour meson decays;the standard model;new physics;supersymmetriy;