5 papers
Top-philic heavy resonances in four-top final states and their EFT interpretation
Luc Darmé, Benjamin Fuks, Fabio Maltoni
With an expected rate of about one event per 100,000 top-quark pairs, four top-quark final states very rarely arise at the LHC. Though scarce, they offer a unique window onto top-q…
Invisible decays of axion-like particles: constraints and prospects
Luc Darmé, Federica Giacchino, Enrico Nardi +1
Axion-like particles (ALPs) can provide a portal to new states of a dark sector. We study the phenomenology of this portal when the ALP mainly decays invisibly, while its interacti…
Selective enhancement of the QCD axion couplings
Luc Darmé, Luca Di Luzio, Maurizio Giannotti +1
We present a mechanism wherein the QCD axion coupling to nucleons, photons, or electrons, can be enhanced selectively without increasing the axion mass. We focus in particular on t…
Signatures of dark Higgs boson in light fermionic dark matter scenarios
Luc Darmé, Soumya Rao, Leszek Roszkowski
Thermal dark matter scenarios based on light (sub-GeV) fermions typically require the presence of an extra dark sector containing both a massive dark photon along with a dark Higgs…
Cornering sgluons with four-top-quark events
Luc Darmé, Benjamin Fuks, Mark Goodsell
The existence of colour-octet scalar states, often dubbed sgluons, is predicted in many extensions of the Standard Model of particle physics, such as supersymmetric realisations fe…