$K_L\rightarrow\mu^+\mu^-$ from lattice QCD

decay amplitude, where QED is treated perturbatively in the continuum and infinite-volume.We provide preliminary numerical results on the quark-connected diagrams on one ensemble at physical pion mass from this method, with well-controlled systematic errors.The successful application of this method will allow the determination of the dispersive part of the aforementioned contribution from first-principles and enable a meaningful comparison between the Standard-Model prediction and experiment.

Note:

contribution to the 40th International Symposium on Lattice Field Theory, Lattice 2023, Fermi National Accelerator Laboratory; references added

pi: mass
dispersion
lattice field theory
numerical calculations
K0(L): decay
muon
quantum electrodynamics
two-photon

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KL→μ+μ−K_L\rightarrow\mu^+\mu^-KL​→μ+μ− from lattice QCD

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$K_L\rightarrow\mu^+\mu^-$ from lattice QCD