A comprehensive overview of kaon decays is presented. The standard model predictions
are discussed in detail, covering both the underlying short-distance electroweak dynamics …

We present an overview of searches for violation of lepton flavor universality with a focus on
low energy precision probes using π, K, τ, and nuclear beta decays. We review the current …

Recently, discrepancies of up to 4 σ between the different determinations of the Cabibbo
angle were observed. In this context, we point out that this “Cabibbo-angle anomaly” can be …

Nuclear β decays as well as the decay of the neutron are well-established low-energy
probes of physics beyond the standard model (SM). In particular, with the axial-vector …

Investigation at a φ-factory can shed light on several debated issues in particle physics. We
discuss:(i) recent theoretical development and experimental progress in kaon physics …

In this article we perform a combined analysis of low energy precision constraints and LHC
searches for leptoquarks which couple to first generation fermions. Considering all ten …

The description of strong interaction physics of low-lying resonances is out of the valid range
of perturbative QCD. Chiral effective field theories (EFTs) have been developed to tackle the …

The most statistically significant hints for new physics in the flavor sector are discrepancies
between theory and experiment in B decays to lepton pairs (b→ s ℓ+ ℓ-) and a deficit in the …

We present the first calculation of coupled-channel meson-meson scattering in the isospin=
1, G-parity negative sector, with channels π η, KK¯ and π η′, in a first-principles approach …

A precision measurement of the ratio RK of the rates of kaon leptonic decays K±→ e±ν and
K±→ μ±ν with the full data sample collected by the NA62 experiment at CERN in 2007–2008 …