项目名称: b介子强子衰变过程的高阶修正唯象研究
项目编号: No.11505148
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 数理科学和化学
项目作者: 樊莹莹
作者单位: 信阳师范学院
项目金额: 18万元
中文摘要: 重味b介子物理是精确检验标准模型、验证QCD理论、探索新物理的重要前沿研究领域,对b介子系统强子衰变过程的研究有重要的科学意义。近二十年来,b介子物理的理论与实验研究都是粒子物理的研究焦点。美国和日本的两家B介子工厂,LHC上的LHCb实验,以及即将投入运行的日本Super-KEKB工厂,为b介子物理的研究提供了强劲的实验推动。本项目将紧密结合国际上有关b介子物理的实验进展,重点考虑目前发现的实验测量结果与标准模型理论预言之间存在的一些偏离和部分反常现象,利用基于k_T因子化的pQCD因子化方法,在圈图层次深入理解相关衰变的QCD动力学及幂次修正效应。课题组计划对末态含有η 或η^'介子的b介子两体无粲衰变过程、末态含有粲介子的b介子两体粲衰变过程,以及b介子系统的三体强子衰变过程进行详细研究和分析,尽可能地比较不同因子化方法效应的异同,为标准模型精确检验和新物理探索提供有效的理论支持。
中文关键词: b介子;强子衰变;标准模型;高阶修正;唯象研究
英文摘要: Heavy flavor b meson physics is the very important area to test the Standard Model, to study the fruitful dynamics of QCD and to search for new physics, the studies on the hadronic decays of b mesons are therefore very important for the development of particle physics. Theoretical and experimental studies of b physics are always the center of attention in the frontier of particle physics in nearly two decades. The two B factories, the LHCb and the future Super-KEKB factory provide strong experiment promotion for the theoretical studies of b physics. The project will be closely with the international progress of b meson physics experiments, focusing on some deviation and anomalies exist between the results of theoretical predictions and experimental measurements, by using the pQCD factorization approach based on the k_T factorization theorem, and considering the effects of the next-to-leading order contributions, understanding the QCD dynamics and the power correction effects at the loop level. We plan to make a systematic phenomenological analysis on the b mesons two body hadronic decays that contain an η or η^'meson or contain the charmful mesons, and the three body hadronic decays of b mesons. To find possible solutions of these “abnormal”, to give reasonable explanations of the standard model for experimental measurement theory and to provide effective theoretical support for precision test the standard model and research for new physics.
英文关键词: b mesons;hadronic decays;Standard Model;high order correction;phenomenological studies