PKU HEP Seminar and Workshop (北京大学高能物理组)
Calculation of the mass difference between the long- and short-lived K mesons for physical quark masses with lattice QCD
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Asia/Shanghai
B105 (CHEP)
B105
CHEP
West Building, School of Physics, PKU
Description
The two neutral kaon states in nature, the $K_L$ (long-lived) and $K_S$ (short-lived) mesons, are the two time-evolution eigenstates of the $K^0 - \overline{K^0}$ mixing system. The prediction of their mass difference $\Delta m_K$ based on the Standard Model is an important goal of lattice QCD. In this talk, I will present the details about evaluating kaon mixing process with lattice QCD and preliminary results from a calculation of $\Delta m_K$ performed on an ensemble of $64^3 \times 128$ gauge configurations with inverse lattice spacing of 2.36 GeV and physical quark masses. Further discussion of the methods employed and the resulting systematic errors will be given.