TL;DR
This paper reports preliminary results from BESIII on charm meson decays and FCNC processes, aiming to validate theoretical models and improve CKM matrix element measurements using high-precision charm data.
Contribution
It provides new experimental measurements of charm decays and FCNC processes, enhancing the validation of Lattice QCD and precision of CKM element determinations.
Findings
Preliminary measurements of leptonic and semileptonic charm decays.
First results on the FCNC process $D^0 ightarrow \gamma \gamma$.
High-precision charm data for CKM validation.
Abstract
About 2.9 fb data set had been collected with the BESIII detector at the BEPCII collider. Taking advantages of data near open-charm threshold, we present preliminary results on leptonic and semileptonic charm-meson decays, as well as result on the FCNC process from BESIII experiment. High precision charm data will enable us to validate Lattice QCD calculations at the few percent level. These can then be used to make precise measurements of CKM elements, and , which are useful to improve the accuracy of test of the CKM unitary.
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