TC2模型下新物理效应对衰变的影响  

New Physics Contributions to Decay in TC2 Model

作　　者：赵炳炎[1] 王辉升[2] 

机构地区：[1]玉林师范学院物理与信息科学系,广西玉林537000 [2]安徽工程科技学院应用数理系,安徽芜湖241000

出　　处：《河北北方学院学报（自然科学版）》2008年第1期16-20,共5页Journal of Hebei North University:Natural Science Edition

摘　　要：分别在标准模型和TC2模型下,对两体非轻衰变B→πK过程作了分析和计算,并考虑了湮灭贡献的影响.发现TC2模型下的新物理贡献对企鹅图修正非常明显,对衰变分支比的影响可以达到120%.通过与目前各大B工厂的实验数据的平均值进行对比,发现标准模型下的理论分支比普遍偏低,而TC2模型产生的新物理效应可以大大提高对衰变分支比,使其与实验结果更好的符合.随着各B工厂更多实验数据的不断发布,相信不久的将来,当新物理效应被探测到时,该理论结果能够为更好的区分各种模型提供理论参考.By calculating and analyzing the non-leptonic decay in SM and TC2 models, we find that the significant New Physics contribution rate in TC2 model to penguin-dominated decays reaches 120%. By comparing with the average value of latest data from some B factories, we find the theoretical branching ratios in SM are too small, but the New Physics effects in TC2 model greatly enhance the branching ratios to improve the consistency of the theoretical predictions with the experimental data. With more experimental data published from B factories, this theoretical phenomenon can provide the reference for selecting New Physics models in the near future.

关 键 词：顶色辅助的人工色模型(TC2模型) B介子 衰变分支比 

分 类 号：O572.25[理学—粒子物理与原子核物理]