重味物理中CP破坏和极化等现象的研究

项目名称： 重味物理中CP破坏和极化等现象的研究

项目编号： No.11505098

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： 李润辉

作者单位： 内蒙古大学

项目金额： 18万元

中文摘要： 长期以来，重味物理是标准模型检验和新物理寻找的主力军。后Higgs时代，新物理的迟迟未现使得在重味物理的精细测量中寻找其蛛丝马迹更加重要。根据实验趋势并结合以往研究工作我们提出以下研究内容：.1. 对CP破坏，尤其是可能会导致较大CP破坏的机制进行研究，定量探讨其可能造成CP破坏的大小和实验上被观察到的可能性；.2. 对B介子衰变中极化现象的数据进行考察，分机制对极化的贡献情况进行研究，力图合理解释B介子衰变中的极化数据；.3. 对B介子到张量粒子的衰变进行研究。对尚未被考察过的衰变道进行研究，并在这一类衰变中寻找能够为解决现有物理问题提供线索和补充知识的方案；.4. 对较重B介子(重子)的稀有衰变和辐射衰变进行研究，提供标准模型的理论数值，探讨新物理的存在空间。.迎合BESIII，将以上研究从B介子衰变推广到D介子衰变。.我们的项目结合前沿和实验趋势，具有重要意义。

中文关键词： 重味物理；B介子稀有衰变；CP破坏；味改变中性流；极化

英文摘要： Heavy flavor physics plays a crucial role in the testing of the Standard Model and probing of the new physics for a very long time. After the discovery of the Higgs particle, the precise measurement in the heavy flavor physics means much more because of the absence of the new physics signal. Basing on the development of the experiments and our finished research, we present the following proposals:.1. We will investigate a mechanism which might cause relatively large CP violation in B meson decays. The quantity of the CP violation and its potential of being observed will be studied..2. The contributions of different polarized states in B meson decays will be studied respectively according to the different mechanisms. combined the ratios of these mechanisms in the amplitudes, the polarization data of B decays is hoped to be explained reasonably..3. The B meson to tensor meson decays will be studied. On one hand, the uncovered channels in the earlier literature will be investigated, on the other, some decays will be studied carefully in order to offer some complementary information to the solutions of certain physical problems..4. The rare and radiative decays of the heavy B mesons or baryons will be researched in purpose of presenting the Standard Model predictions and exploring the new physics space..Considering the running of BESIII, we will try to expand the above studies to the D meson decays..Our project bases on the theoretical and experimental development. It will bring in meaningful studies for heavy flavor physics.

英文关键词： Heavy Flavor Physics;Rare decays of B mesons;CP Violation;Flavor Changing Neutral Current;Polarization