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...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.展开更多
基金Supported by National Natural Science Foundation of China(11675082,11375128,11405046)Special Grant of the Xuzhou University of Technology(XKY2016211)
文摘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.
