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Abstract: Since the discovery of open charm hadrons, they have been an ideal lab to explore the electroweak and strong interactions. Up to now, the BESIII experiment has collected the world largest threshold open charm data samples of D0(+), Ds+ and Lambda_c+. Based on these samples, many important results have been achieved with much improved precision or for the first time. The precisely determined form factors of semileptonic decays, CKM matrix elements |Vcs(d)|, D(s) decay constants are important to calibrate the LQCD calculations and to test the unitarity of the CKM matrix. The parameter of CP violation and strong phase that help to determine the CKM angle of gamma/phi3 have been determined with the advantage of the quantum correlated production of D0D0bar pairs in psi(3770) decays. Overall measurements of the absolute branching fractions of Lambda_c+ decays with much improved precision have been a milestone in the Lambda_c+ field. Some other interesting results will also be covered in this talk.
摘要：
粲强子发现后，成为人们探讨强、电弱相互作用的一个理想窗口。时至今日，BESIII实验采集了世界上最大的近阈粲强子(D0(+)、Ds+和Lambdac+)数据。基于这些数据，BESIII已经取得了一些精度显著改进或首次测量的重要结果。精密测定的半轻衰变形状因子、CKM矩阵元|Vcs(d)|和D+(s)衰变常数对刻度格点QCD的计算、检验CKM矩阵的幺正性具有重要意义。通过D0D0-bar在psi(3770)->衰变中独特的量子关联机制测定的CP破坏参数及强相差有助于改进CKM角gamma/phi3的测量精度。使用近阈数据系统测量Lambda_c+衰变绝对分支比，成为Lambda_c+研究的一个里程碑。报告还包括其他一些重要结果。
About Speaker:
Hailong Ma, graduated from IHEP, CAS in 2006, worked as post doctor in CCAST from 2006 to 2008, worked in EPD of IHEP from 2008. From 2003, I have been working on the experimental studies of psi(3770) and charm physics at BESII and BESIII.
个人简介：
马海龙，2006年毕业于中国科学院高能物理研究所、获博士学位，2006-2008年于中国高等科学技术中心开展博士后研究，2008年入职高能所实验物理中心。2003年以来主要从事BESII和 BESIII上的psi(3770)和粲物理实验研究。