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Isospin-violating contributions to ∈′/∈
Abstract The known isospin-breaking contributions to the K → ππ amplitudes are reanalyzed, taking into account our current understanding of the quark masses and the relevant non-perturbative inputs.
Determination of the QCD coupling from ALEPH τ decay data
We present a comprehensive study of the determination of the strong coupling from τ decay, using the most recent release of the experimental ALEPH data. We critically review all theoretical
Updated determination of chiral couplings and vacuum condensates from hadronic $\tau$ decay data
We analyze the lowest spectral moments of the left-right two-point correlation function, using all known short-distance constraints and the recently updated ALEPH V-A spectral function from tau
Short-distance HLbL contributions to the muon anomalous magnetic moment beyond perturbation theory
The hadronic light-by-light contribution to the muon anomalous magnetic moment depends on an integration over three off-shell momenta squared ( Q i 2 $$ {Q}_i^2 $$ ) of the correlator of four
The two-loop perturbative correction to the (g − 2)μ HLbL at short distances
The short-distance behaviour of the hadronic light-by-light (HLbL) contribution to (g − 2)μ has recently been studied by means of an operator product expansion in a background electromagnetic field.
Evaluating the progress of deep learning for visual relational concepts
It will be hypothesised that iterative processing of the input, together with shifting attention between the iterations will be needed to efficiently and reliably solve real world relational concept learning.
Theoretical status of ε ′/ε
We briefly overview the historical controversy around Standard Model predictions of $\varepsilon'/\varepsilon$ and clarify the underlying physics. A full update of this important observable is