C. Sachrajda

collaborators

6 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

Complete lattice QCD calculation of $K^{-} \to ℓ^{-} I^ˉ ½_{ℓ} ℓ^{^{'} +} ℓ^{^{'} -}$ form factors

R. Di Palma, R. Frezzotti, G. Gagliardi +6

We present the first complete lattice QCD calculation of the four structure-dependent form factors governing the rare charged kaon decay $K^- \to \ell^- \barÎ½_\ell \ell'^+ \ell'^-…

hep-ph2026

Rare kaon decays $K^{-} \to ℓ^{-} I^ˉ ½_{ℓ} ℓ^{' +} ℓ^{' -}$ : Standard Model predictions from lattice QCD

R. Di Palma, R. Frezzotti, G. Gagliardi +6

Weak decays of charged kaons with an additional lepton-antilepton pair, $K^{-} \to ℓ^{-} I^ˉ ½_{ℓ} ℓ^{' +} ℓ^{' -}$ ( $K_{ℓ 2 ℓ^{'}}$ ), are suppressed at order $O(G_{F}^{2}Î±_…

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

Theoretical framework for lattice QCD computations of $B \to K ℓ^{+} ℓ^{-}$ and $B ˉ_{s} \to ℓ^{+} ℓ^{-} I^^{3}$ decays rates, including contributions from charming penguin diagrams

R. Frezzotti, G. Gagliardi, V. Lubicz +6

We develop a strategy for computing the $B \to K ℓ^{+} ℓ^{-}$ and $B ˉ_{s} \to I^^{3} ℓ^{+} ℓ^{-}$ decay amplitudes using lattice QCD (where $ℓ^{\pm}$ are charged leptons). We focus on…

hep-lat2025

Kaon radiative leptonic decay rates from lattice QCD simulations at the physical point

R. Di Palma, R. Frezzotti, G. Gagliardi +6

We present a lattice QCD calculation of the radiative leptonic decay rates of the kaon, improving upon our previous work, arXiv:2006.05358. Our analysis uses gauge ensembles genera…

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

Complete lattice QCD calculation of K−→ℓ−I^ˉ½ℓ​ℓ′+ℓ′− form factors

Rare kaon decays K−→ℓ−I^ˉ½ℓ​ℓ′+ℓ′−: Standard Model predictions from lattice QCD

Lattice Calculation of Light Meson Radiative Leptonic Decays

Theoretical framework for lattice QCD computations of B→Kℓ+ℓ− and Bˉs​→ℓ+ℓ−I^3 decays rates, including contributions from charming penguin diagrams

Kaon radiative leptonic decay rates from lattice QCD simulations at the physical point

Complete lattice QCD calculation of $K^{-} \to ℓ^{-} I^ˉ ½_{ℓ} ℓ^{^{'} +} ℓ^{^{'} -}$ form factors

Rare kaon decays $K^{-} \to ℓ^{-} I^ˉ ½_{ℓ} ℓ^{' +} ℓ^{' -}$ : Standard Model predictions from lattice QCD

Theoretical framework for lattice QCD computations of $B \to K ℓ^{+} ℓ^{-}$ and $B ˉ_{s} \to ℓ^{+} ℓ^{-} I^^{3}$ decays rates, including contributions from charming penguin diagrams