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 …

A bstract Axions and axion-like particles (ALPs) are well-motivated low-energy relics of high-
energy extensions of the Standard Model (SM). We investigate the phenomenology of an …

A bstract Searches for dark photons provide serendipitous discovery potential for other types
of vector particles. We develop a framework for recasting dark photon searches to obtain …

A bstract Dark matter interacting via the exchange of a light pseudoscalar can induce
observable signals in indirect detection experiments and experience large self-interactions …

A bstract We show that the relaxion generically stops its rolling at a point that breaks CP
leading to relaxion-Higgs mixing. This opens the door to a variety of observational probes …

A bstract We present a comprehensive analysis of low-energy signals of hypothetical scalar
leptoquark interactions in lepton and kaon transitions. We derive the most general effective …

Abstract The Standard Model (SM) does not contain by definition any new physics (NP)
contributions to any observable but contains four CKM parameters which are not predicted …

We derive improved stellar luminosity limits on a generic light CP-even scalar field S mixing
with the Standard Model (SM) Higgs boson from the supernova SN1987A, the Sun, red …

A bstract We analyse for the first time the CP violating ratio ε′/ε in K→ ππ decays in
leptoquark (LQ) models. Assuming a mass gap to the electroweak (EW) scale, the main …

A bstract The kaon sector is characterised by several processes which are under active
investigation across different experiments. In this work, we present the global picture that …