Looking for new physics via semi-leptonic and leptonic rare decays of D and Ds  

作　　者：郭星导 郝喜庆 柯红卫 赵明刚 李学潜 

机构地区：[1]School of Physics and Math,Xuzhou University of Technology [2]Department of Physics,Nankai University [3]Physics Department,Henan Normal University [4]School of Science,Tianjin University

出　　处：《Chinese Physics C》2017年第9期59-69,共11页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11675082,11375128,11405046);Special Grant of the Xuzhou University of Technology(XKY2016211)

摘　　要：It is well recognized that looking for new physics at lower energy colliders is a path wnmn is complemen- tary to high energy machines such as the LHC. Using the large volume of data collected by BESIII, we may have a unique opportunity to tackle this. In this paper we calculate the branching ratios of the semi-leptonic processes D＋ → K＋e-e＋ and D＋ → K＋e-P-＋, and the leptonic processes D0→ e-e＋ and D0→ e-μ＋, in the frameworks of the U（1） model, 2HDM and unparticle model. It is found that both the U（1） model and 2HDM may influence the semi-leptonic decay rates, but only the U（1） model offers substantial contributions to the pure leptonic decays, and the resultant branching ratio of DO → e- μ＋ can be as large as 10-7 - 10-8. This might be observed at the future super τ-charm factory.It is well recognized that looking for new physics at lower energy colliders is a path wnmn is complemen- tary to high energy machines such as the LHC. Using the large volume of data collected by BESIII, we may have a unique opportunity to tackle this. In this paper we calculate the branching ratios of the semi-leptonic processes D＋ → K＋e-e＋ and D＋ → K＋e-P-＋, and the leptonic processes D0→ e-e＋ and D0→ e-μ＋, in the frameworks of the U（1） model, 2HDM and unparticle model. It is found that both the U（1） model and 2HDM may influence the semi-leptonic decay rates, but only the U（1） model offers substantial contributions to the pure leptonic decays, and the resultant branching ratio of DO → e- μ＋ can be as large as 10-7 - 10-8. This might be observed at the future super τ-charm factory.

关 键 词：rare decay D meson LFV 

分 类 号：O572.2[理学—粒子物理与原子核物理]