Electron mass singularities in semileptonic kaon decays

  title={Electron mass singularities in semileptonic kaon decays},
  author={Chien Yeah Seng and William Joseph Marciano and Ulf-G. Meissner},
  journal={Physical Review D},
We show that recent improvements in the O ( α ) long-distance quantum electrodynamics (QED) corrections to the radiative inclusive K e 3 decay rate using the Sirlin representation are free from infrared divergences and collinear electron mass singularities in the limit m e → 0, as predicted by the Kinoshita-Lee-Nauenberg theorem. We also verify that in massless QED with the simultaneous dimensional regularization of QED photon infrared divergences and electron mass singularities leads to the… 

Figures from this paper




  • 172
  • 2021


  • Lett. B 820, 136522
  • 2021

Radiative Corrections to Semileptonic Beta Decays: Progress and Challenges

We review some recent progress in the theory of electroweak radiative corrections in semileptonic decay processes. The resurrection of the so-called Sirlin’s representation based on current algebra

and a at

The xishacorene natural products are structurally unique apolar diterpenoids that feature a bicyclo[3.3.1] framework. These secondary metabolites likely arise from the well-studied, structurally

The CKM unitarity problem: a trace of new physics at the TeV scale?

After the recent high precision determinations of $$V_{us}$$ V us and $$V_{ud}$$ V ud , the first row of the CKM matrix shows more than $$4\sigma $$ 4 σ deviation from unitarity. Two possible

Dispersive analysis of $$\eta \rightarrow 3 \pi $$η→3π

The dispersive analysis of the decay $$\eta \rightarrow 3\pi $$η→3π is reviewed and thoroughly updated with the aim of determining the quark mass ratio