TY  - JOUR
AU  - Seng, Chien-Yeah
AU  - Galviz, Daniel
AU  - Meißner, Ulf-G.
TI  - A new theory framework for the electroweak radiative corrections in Kl3 decays
JO  - Journal of high energy physics
VL  - 2020
IS  - 2
SN  - 1029-8479
CY  - [Trieste]
PB  - SISSA
M1  - FZJ-2021-00171
SP  - 69
PY  - 2020
AB  - We propose a new theory framework to study the electroweak radiative corrections in Kl3 decays by combining the classic current algebra approach with the modern effective field theory. Under this framework, the most important O(GFα) radiative corrections are described by a single tensor Tμν involving the time-ordered product between the charged weak current and the electromagnetic current, and all remaining pieces are calculable order-by-order in Chiral Perturbation Theory. We further point out a special advantage in the K0l3 channel that it suffers the least impact from the poorly-constrained low-energy constants. This finding may serve as a basis for a more precise extraction of the matrix element Vus in the future.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000615240800001
DO  - DOI:10.1007/JHEP02(2020)069
UR  - https://juser.fz-juelich.de/record/889266
ER  -