Recent results, status and prospects for the BESIII experiment

4th Symposium on Prospects in the Physics of Discrete Symmetries

Garzia, Isabella^1

INFN-Sezione di Ferrara, via Saragat 1, Ferrara

44122, Italy^1

关键词: Average values;    Branching fractions;    Center-of-mass energies;    Charmonium spectroscopy;    External input;    Phase difference;    Precise measurements;    Status and prospect;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/631/1/012043/pdf
DOI  :  10.1088/1742-6596/631/1/012043

来源: IOP

【 摘 要 】

We report the measurement of the asymmetry ACPof the branching fractions of D0→ K-π+in the CP-odd and CP-even eigenstates using a data sample of 2.92 fb-1collected with the BESIII detector at the center-of-mass energy √s = 3.773 GeV. With the measured ACP, the strong phase difference δKπbetween the doubly Cabibbo-suppressed process D0→ K-π+and the Cabibbo-favored process D0→ K-π+is extracted. Using world- average values of external parameters, we obtain the most precise measurement of δKπto date: cos δKπ= 1.02 ± 0.11 ± 0.06 ± 0.01. The first and second uncertainties are statistical and systematic, respectively, while the third arises from external input. Based on the same data sample a preliminary results of the parameter yCPin D0D0oscillation is obtained. Finally, a summary of the recent results from charmonium spectroscopy is reported. The high statistics accumulated at the Y(4260) and Y(4360) energies help us to understand the nature and the proprieties of the XYZ states.