Author

Lukáš Gráf

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Preprint Sep 2026

Flavorful Lepton-Number-Violating SMEFT: Loop Mixing, $0\nu\beta\beta$ and Rare Meson Decays

We investigate how one-loop operator mixing reshapes the flavor sensitivity of lepton-number-violating dimension-7 SMEFT interactions. Using both bottom-up and top-down EFT approaches, we study the interplay of neutrinoless double beta decay ($0\nu\beta\beta$) and neutral current rare meson decays $K\to\pi\nu\nu$, and...

Lukáš Gráf, C. Hati, Ana Martín-Galán et al. · 0 citations

Preprint Sep 2026

Probing $\nu$SMEFT at Belle II with displaced dilepton vertices

The existence of right-handed (RH) neutrinos is strongly motivated by the observation of small neutrino masses and as a means to shed light on the origin of parity violation in the Standard Model (SM). Experimental searches for the corresponding mass eigenstates, referred to as heavy neutral leptons (HNLs), have been c...

P. Bolton, Fabian Esser, Lukáš Gráf et al. · 1 citation