Axion-like particles (ALPs) are compelling dark matter candidates, particularly in the "ultralight mass regime." In this talk, I will discuss the theoretical framework for ALP interactions with Standard Model fields, emphasising the renormalization group (RG) running and low-energy matching in quantum field theory. Many quantum sensor experiments are designed to probe very light ALPs, which...
Axion-Like Particles (ALPs), arising from spontaneous global symmetry breaking in many Standard Model extensions, provide a compelling avenue for probing new physics. We study ALP production in association with top quarks through several channels at the LHC and future colliders. We focus in particular on light ALPs that escape detection and appear as missing transverse energy. Using full Run 2...
Light scalar fields are ubiquitous in theoretical (astro)particle physics and cosmology. From the perspective of effective field theories, these scalars encounter hierarchy problems unless their masses are protected by a symmetry. Non-standard UV completions involving non-localizable fields may introduce correlations between short and long distances, thereby generating a UV/IR mixing that...
Gauge-fermion theories and their IR fate remain puzzling mysteries in QFT, even after decades of study. Beyond their theoretical interest, they could play a natural role in extensions of the SM, such as GUTs, dynamical symmetry breaking, and models of quark and lepton substructure. Yet our ignorance of these models severely hampers their potential application to realistic theories of nature....
The idea of introducing extra spacetime dimensions has long been viewed as a promising way to extend the Standard Model, offering new tools to address some of its limitations. One interesting example is provided by asymptotic Grand Unified Theories (aGUTs), where the gauge couplings of the Standard Model forces do not unify at a single high-energy scale but instead evolve toward a common fixed...
In this talk, we will discuss the feasibility of measuring the Higgs self couplings through triple Higgs production at future proton–proton colliders. In particular, our study will focus on the 6 b final state.
Moreover, we will explore the possibility of detecting extra scalars at the LHC as a result of an enhanced triple Higgs production cross section, with a particular emphasis on the Two...
Future Higgs Factories will offer a clean environment to study $e^-e^+\rightarrow q \bar{q}$
processes ($q=d,u,s,c,b$) at various centre-of-mass energies, from the Z-pole up to the TeV scale. In this contribution, we focus on the case of $e^-e^+\rightarrow s \bar{s}$
at $\sqrt{s}=250$ GeV, using full simulation and reconstruction within the ILD detector concept to evaluate differential...
