Rare meson decays are among the most sensitive probes of both heavy and light new
physics. Among them, new physics searches using kaons benefit from their small total decay …

Decays of the neutral and long-lived η and η′ mesons provide a unique, flavor-conserving
laboratory to test low-energy Quantum Chromodynamics and search for new physics …

Belle II has reported the first evidence for B+→ K+ ν ν¯ with a branching ratio 2.7 σ higher
than the standard model expectation. We explain this and the MiniBooNE and muon …

We consider a simple extension of the Standard Model (SM) by a complex scalar doublet
and a singlet along with three sterile neutrinos. The sterile neutrinos mix with the SM …

A bstract A new measurement of the muon anomalous magnetic moment, g μ− 2, has been
reported by the Fermilab Muon g-2 collaboration and shows a 4. 2 σ departure from the most …

A bstract We comprehensively study all viable new-physics scenarios that resolve the muon
(g− 2) μ anomaly with only Standard Model singlet particles coupled to muons via …

A recent update from MiniBooNE has strengthened the observed 4.8σ excess of e-like
events. Motivated by this and other notable deviations from standard model predictions …

We show that one of the simplest extensions of the Standard Model, the addition of a second
Higgs doublet, when combined with a dark sector singlet scalar, allows us to i) explain the …

We calculate contributions to the anomalous magnetic moment of the muon from heavy
neutral and charged Higgs bosons and new leptons in two-Higgs-doublet models extended …

A bstract The two kaon factories, KOTO and NA62, are at the cutting edge of the intensity
frontier, with an unprecedented numbers of long lived and charged Kaons,∼ 10 13, being …