Luchang Jin

collaborators

5 papers

hep-lat2026

First Lattice QCD Determination of Lepton-Flavor-Universality Ratios in Light-Meson Leptonic Decays

Peter Boyle, Norman H. Christ, Xu Feng +4

The ratio of electronic to muonic leptonic decay widths, $R_{e / I^¼}$ , for the light mesons $I ¨ $ and $K$ , provides a clean test of lepton flavor universality (LFU) and a sensitive pr…

hep-lat2026

Lattice Calculation of Light Meson Radiative Leptonic Decays

Peter Boyle, Norman H. Christ, Xu Feng +4

In this work, we perform a lattice QCD calculation of the branching ratios and the form factors of radiative leptonic decays $P \to ℓ I^½_{ℓ} I^^{3}$ ( $P = I ¨ , K$ ) using $N_{f} = 2 + 1$ d…

hep-lat2026

Lattice Calculation of Short-Range Contributions to Neutrinoless Double-Beta Decay $I ¨ ^{-} \to I ¨ ^{+} ee$ at Physical Pion Mass

Peter Boyle, Felix Erben, Xu Feng +7

Neutrinoless double-beta ( $0 I^½ I^^{2} I^^{2}$ ) decays provide an excellent probe for determining whether neutrinos are Dirac or Majorana fermions. The short-range matrix elements associated…

hep-lat2026

Using lattice chiral effective theory to study pi-pi scattering

Cameron Cianci, Luchang Jin, Joshua Swaim

We use lattice field theory to study the finite-volume energy spectrum of the $I ¨ I ¨ $ system in $S U (2)$ chiral effective field theory (ChEFT) at leading order in the chiral expansio…

hep-lat2025

An exploratory calculation of $K_{L} \to I^¼^{+} I^¼^{-}$ decay from Lattice QCD at physical pion mass

Peter Boyle, En-Hung Chao, Norman Christ +3

We compute the complex, long-distance two-photon-exchange amplitude which contributes to the rare $K_{L} \to I^¼^{+} I^¼^{-}$ decay from lattice QCD. We use a $2 4^{3} \times 64$ ph…

First Lattice QCD Determination of Lepton-Flavor-Universality Ratios in Light-Meson Leptonic Decays

Lattice Calculation of Light Meson Radiative Leptonic Decays

Lattice Calculation of Short-Range Contributions to Neutrinoless Double-Beta Decay I¨−→I¨+ee at Physical Pion Mass

Using lattice chiral effective theory to study pi-pi scattering

An exploratory calculation of KL​→I^¼+I^¼− decay from Lattice QCD at physical pion mass

Lattice Calculation of Short-Range Contributions to Neutrinoless Double-Beta Decay $I ¨ ^{-} \to I ¨ ^{+} ee$ at Physical Pion Mass

An exploratory calculation of $K_{L} \to I^¼^{+} I^¼^{-}$ decay from Lattice QCD at physical pion mass