Weak interactions of kaons from lattice QCD

11th International Conference on Hyperons, Charm and Beauty Hadrons

Christ, Norman H^1,1 ; UKQCD Collaboration^1

Physics Department, Columbia University, New York

NY

10027, United States^1

关键词: Bounded uncertainty;    Complex amplitude;    Computer resources;    CP-violating parameters;    First principles;    Rare kaon decay;    The standard model;    Weak interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/556/1/012005/pdf
DOI  :  10.1088/1742-6596/556/1/012005

来源: IOP

【 摘 要 】

The methods of lattice QCD and available computer resources are now sufficient that predictions for many of the Standard Model properties of kaons can be made from first principles with accurately bounded uncertainties. We discuss two relatively new areas where lattice methods are having or will soon have a large impact: calculation of the two complex amplitudes A0and A2describing the decay of the kaon into two-pions with I 0 and 2 and calculation of long-distance contributions to second-order electro-weak processes including the KL-KSmass difference ΔMK, the CP-violating parameter ΕKand certain rare kaon decays.