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9 papers · 2 filters
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…
Finite-volume effects in long-distance processes with massless leptonic propagators
Norman H. Christ, Xu Feng, Lu-Chang Jin +1
In Ref. [1], a method was proposed to calculate QED corrections to hadronic self energies from lattice QCD without power-law finite-volume errors. In this paper, we extend the meth…
Field sparsening for the construction of the correlation functions in lattice QCD
Yuan Li, Shi-Cheng Xia, Xu Feng +2
Two field-sparsening methods, namely the sparse-grid method and the random field selection method, are used in this paper for the construction of the 2-point and 3-point correlatio…
On the application of Effective Field Theory to finite-volume effects in
Christopher Aubin, Thomas Blum, Maarten Golterman +1
One of the more important systematic effects affecting lattice computations of the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon, $a_μ^{\rm…
Valence parton distribution of pion from lattice QCD: Approaching continuum
Xiang Gao, Luchang Jin, Christos Kallidonis +6
We present a high-statistics lattice QCD determination of the valence parton distribution function (PDF) of the pion, with a mass of 300 MeV, using two very fine lattice spacings o…
Finite-volume formalism in the transition: an application to the lattice QCD calculation of double beta decays
Xu Feng, Lu-Chang Jin, Zi-Yu Wang +1
We present the formalism for connecting a second-order electroweak transition amplitudes in the finite volume (with two hadrons in the initial and final…