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  - GSI-2021-00670
M1  - arXiv:2009.00459
SP  - 179
PY  - 2020
N1  - This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0). Funded by SCOAP3
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  - V<sub>us</sub> -  and the top-row Cabibbo-Kobayashi-Maskawa matrix unitarity.
KW  - effect: electromagnetic (INSPIRE)
KW  - perturbation theory: chiral (INSPIRE)
KW  - meson: semileptonic decay (INSPIRE)
KW  - pi: semileptonic decay (INSPIRE)
KW  - CKM matrix: unitarity (INSPIRE)
KW  - lattice field theory (INSPIRE)
KW  - anomaly (INSPIRE)
KW  - Chiral Lagrangians (autogen)
KW  - Kaon Physics (autogen)
KW  - Lattice QCD (autogen)
KW  - Precision QED (autogen)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000590545400006
DO  - DOI:10.1007/JHEP10(2020)179
UR  - https://repository.gsi.de/record/238116
ER  -