$K\toππ$ from electroweak penguins in $N_f=2$ domain-wall QCD
Year: 2005
Type: preprint
Abstract: We present the calculation of $K\toππ$ matrix elements of electroweak penguin operators {\it i.e.} $Q_7$ and $Q_8$. In the numerical simulation, we use the gauge configurations generated by the combination of $N_f=2$ domain-wall fermions and DBW2 gauge action. From $K\toπ$ and $K\to 0$ matrix elements on the lattice, we construct $K\toππ$ matrix elements at next-to-leading order in the chiral expansion by using recent analytic results. Renormalization factor of these matrix elements are obtained by the non-perturbative renormalization technique in RI/MOM scheme. Brief discussion based on our results are made as well as a comparison with previous works.
Source: arXiv (Cornell University)
Author: Noaki, Jun
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4394639720