TY  - JOUR
AU  - Seng, Chien-Yeah
AU  - Feng, Xu
AU  - Gorchtein, Mikhail
AU  - Jin, Lu-Chang
AU  - Meißner, Ulf-G.
TI  - New method for calculating electromagnetic effects in semileptonic beta-decays of mesons
JO  - Journal of high energy physics
VL  - 2020
IS  - 10
SN  - 1029-8479
CY  - [Trieste]
PB  - SISSA
M1  - FZJ-2021-00147
SP  - 179
PY  - 2020
AB  - We construct several classes of hadronic matrix elements and relate them to the low-energy constants in Chiral Perturbation Theory that describe the electromagnetic effects in the semileptonic beta decay of the pion and the kaon. We propose to calculate them using lattice QCD, and argue that such a calculation will make an immediate impact to a number of interesting topics at the precision frontier, including the outstanding anomalies in |Vus| and the top-row Cabibbo-Kobayashi-Maskawa matrix unitarity.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000590545400006
DO  - DOI:10.1007/JHEP10(2020)179
UR  - https://juser.fz-juelich.de/record/889242
ER  -