76 citations · 212 across the 18 of their papers we have counts for
6 papers · 1 filter
Two-Meson Form Factors in Unitarized Chiral Perturbation Theory
Yu-Ji Shi, Chien-Yeah Seng, Feng-Kun Guo +3
We present a comprehensive analysis of form factors for two light pseudoscalar mesons induced by scalar, vector, and tensor quark operators. The theoretical framework is based on a…
New method for calculating electromagnetic effects in semileptonic beta-decays of mesons
Chien-Yeah Seng, Xu Feng, Mikhail Gorchtein +2
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…
Weak charge and weak radius of C
Oleksandr Koshchii, Jens Erler, Mikhail Gorchtein +5
We present a feasibility study of a simultaneous sub-percent extraction of the weak charge and the weak radius of the C nucleus using parity-violating electron scattering,…
First-principles calculation of electroweak box diagrams from lattice QCD
Xu Feng, Mikhail Gorchtein, Lu-Chang Jin +2
We present the first realistic lattice QCD calculation of the -box diagrams relevant for beta decays. The nonperturbative low-momentum integral of the loop is calculated u…
Joint lattice QCD - dispersion theory analysis confirms the quark-mixing top-row unitarity deficit
Chien-Yeah Seng, Xu Feng, Mikhail Gorchtein +1
Recently, the first ever lattice computation of the -box radiative correction to the rate of the semileptonic pion decay allowed for a reduction of the theory uncertainty of th…
Contraction Diagram Analysis in Pion-Kaon Scattering
Chaitra Kalmahalli Guruswamy, Ulf-G. Meißner, Chien-Yeah Seng
We study the contributions from the connected and disconnected contraction diagrams to the pion-kaon scattering amplitude within the framework of SU partially-quenched chira…