A lattice QCD+QED strategy is outlined for calculating isospin-breaking effects in inclusive tau decays to support high-precision HVP contributions to muon g-2.
Weak transition matrix elements from finite-volume correlation functions
5 Pith papers cite this work. Polarity classification is still indexing.
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abstract
The two-body decay rate of a weakly decaying particle (such as the kaon) is shown to be proportional to the square of a well-defined transition matrix element in finite volume. Contrary to the physical amplitude, the latter can be extracted from finite-volume correlation functions in euclidean space without analytic continuation. The K -> pi pi transitions and other non-leptonic decays thus become accessible to established numerical techniques in lattice QCD.
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UNVERDICTED 5representative citing papers
Framework for exact and approximate kernel transformations between smeared spectral functions, including systematic error bounds computable from input data.
The paper proposes capturing all ΔI=1/2-enhanced isospin-breaking effects on ε' via QCD+QED lattice simulations limited to photons with energies 0.5-2.0 GeV, with a ChPT estimate placing the low-energy contribution at ~0.5%.
Lattice QCD on finer grids yields a_μ^LO-HVP = 715.1(3.4)×10^{-10}, producing a standard-model prediction for a_μ that differs from experiment by only 0.5 sigma.
The paper provides an overview of theoretical calculations for lepton anomalous magnetic moments arising from quantum corrections in the Standard Model.
citing papers explorer
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Isospin-breaking effects in inclusive hadronic $\tau$ data for the muon $(g-2)$ from first principles
A lattice QCD+QED strategy is outlined for calculating isospin-breaking effects in inclusive tau decays to support high-precision HVP contributions to muon g-2.
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Kernel transformations and bounds for smeared spectral functions
Framework for exact and approximate kernel transformations between smeared spectral functions, including systematic error bounds computable from input data.
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Isospin breaking corrections to a lattice QCD calculation of $\varepsilon'$
The paper proposes capturing all ΔI=1/2-enhanced isospin-breaking effects on ε' via QCD+QED lattice simulations limited to photons with energies 0.5-2.0 GeV, with a ChPT estimate placing the low-energy contribution at ~0.5%.
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Hybrid calculation of hadronic vacuum polarization in muon g-2 to 0.48\%
Lattice QCD on finer grids yields a_μ^LO-HVP = 715.1(3.4)×10^{-10}, producing a standard-model prediction for a_μ that differs from experiment by only 0.5 sigma.
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Lepton anomalous magnetic moments: Theory
The paper provides an overview of theoretical calculations for lepton anomalous magnetic moments arising from quantum corrections in the Standard Model.