Heinz Rupertsberger

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

Abstract. We present a complete calculation of the

Radiative corrections to K(l3) decays

K_{\ell 3}

Chiral perturbation theory with virtual photons and leptons

decays

The electromagnetic interaction in chiral perturbation theory

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

Isospin breaking in chiral perturbation theory and the decaysη →πℓν andτ →ηπν

and

Decay. eta. r arrow. pi. l. nu. reexamined

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

Strings, monopoles, and meson states

to

Decay eta --> pi l nu reexamined.

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

Semiclassical functional methods for arbitrary Hamiltonians

in chiral perturbation theory with virtual photons and leptons. We introduce the concept of generalized form factors and kinematical densities in the presence of electromagnetism, and propose a possible treatment of the real photon emission in

Hamiltonian formulation of monopole theories with strings

K^+_{\ell 3}