CP violation plays an important role in interpreting the matter-antimatter asymmetry in the Universe and searching for new physics beyond the Standard Model. So far CP violation has not been observed in the charm sector. Searching for CPV is one major goal of charm physics. We find new measurable effect of CP asymmetries in the non-leptonic charmed hadron decaying into neutral kaons in the Cabibbo-favored and doubly Cabibbo-suppressed processes. Compared to the CP asymmetries in the singly Cabibbo-suppressed processes, the advantages of this new effect include avoiding ambiguities from penguin contributions in theory, with only tree-level amplitudes available to be extracted from the data of branching fractions. Besides, such processes having larger branching fractions benefits for measurements in experiment. The values of such CP asymmetries are at the order of 10^{-3} and hence are accessible by the LHCb and Belle II experiments in the near future. Besides, the measurement and determination of time-dependent CP asymmetries at t=0 is a smoking gun of direct CP violation in charm decays and signal of new physics.

于福升，2008年畢業于上海大學物理系，2008年至2013年就讀于中國科學院高能物理研究所并獲理學博士學位，巴黎第十一大學聯合培養博士生，2013年至今為蘭州大學核科學與技術學院副教授。從事粒子物理理論方面的研究工作，包括重味物理相關的唯象學、精确檢驗粒子物理标準模型和尋找超出标準模型的新物理。提出因子化輔助的拓撲圖方法，是目前對D介子弱衰變過程理解得最有效的方法，預言的直接CP破壞值被LHCb實驗驗證，得到國際廣泛關注。到目前在國際主流期刊發表多篇學術論文，多次應邀在國際國内重要會議上做學術報告。論文被國際上著名的各大實驗組多次引用。