H. Neufeld

An evaluation of | V us | and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays

We present a global analysis of leptonic and semileptonic kaon decay data, including all recent results published by the BNL-E865, KLOE, KTeV, ISTRA+ and NA48 experiments. This analysis, in conjunction with precise lattice calculations of the hadronic matrix elements now available, leads to a very precise determination of |Vus| and allows us to perform several stringent tests of the Standard Model.

Kaon Decays in the Standard Model

A comprehensive overview of kaon decays is presented. The Standard Model predictions are discussed in detail, covering both the underlying short-distance electroweak dynamics and the important interplay of QCD at long distances. Chiral perturbation theory provides a universal framework for treating leptonic, semileptonic and nonleptonic decays including rare and radiative modes. All allowed decay modes with branching ratios of at least 10^(-11) are analyzed. Some decays with even smaller rates are also included. Decays that are strictly forbidden in the Standard Model are not considered in this review. The present experimental status and the prospects for future improvements are reviewed.

Radiative corrections to \(K_{\ell 3}\) decays

Abstract. We present a complete calculation of the

Isospin violation and the magnetic moment of the muon

K_{\ell 3}

Radiative corrections to K(l3) decays

decays

Chiral perturbation theory with virtual photons and leptons

K^+ \to \pi^0 \ell^+ \nu_{\ell}

Radiative τ decay and the magnetic moment of the muon

and

Spontaneous {CP} Violation in Left-right Symmetric Gauge Theories

K^0 \to \pi^- \ell^+ \nu_\ell

The K(l3) scalar form factors in the standard model

to

Meson resonances, large Nc and chiral symmetry

\mathcal O(p^4, (m_d-m_u) p^2, e^2 p^2)