While axions (which are very well-motivated) heavily dominate the amount of work currently done regarding the strong CP problem, alternatives ought to be systematically investigated, in order to assess what the strong CP problem really entails (and potentially update our theoretical biases). In this context, I will talk about solutions that rely on spontaneously broken spacetime symmetries,...
We present the detection prospects of new Standard Model (SM)-neutral vector bosons ($Z_{\prime}$) that couple exclusively to leptons at the Future Circular Collider in the electron-positron stage (FCC-ee). We focus our search on $Z’$ production with a radiated photon, and show that FCC-ee can significantly extend the unprobed parameter space for this class of models in the kinematically...
The Standard Model of particle physics is a quantum field theory, based on quantum mechanics and special relativity. Therefore, it allows us to test fundamental properties of quantum mechanics. Top-quark pairs, which are generated at the LHC, are a unique high-energy system since their spin correlations can be measured. Thus, it is possible to study fundamental aspects of quantum mechanics...
Depending on the length of the talk and the preference of the session conveners, the presentation could either focus on the search for heavy stable charged particles at CMS (work performed at IPHC) or cover a broader panel of LLP searches at CMS, associated to different experimental signatures in the detector.
Deviations from the Standard Model have long been observed in semileptonic B-meson decays, notably $b→ s \ell \ell$ transitions, triggering speculations on potential New Physics effects in this sector. Following recent updates of $R_{K^{(*)}}$ and $BR(B_{(s)} → μμ)$, and the first measurement of $R_\phi$ by the LHCb collaboration, the sole remaining significant deviations from the SM in...
Under certain conditions, a first-order phase transition during early-universe symmetry breaking can generate observable signals in the stochastic gravitational-wave (GW) background. Since the Standard Model (SM) predicts a cross-over phase transition, detectable signals are expected to arise from beyond the SM frameworks, traditionally testable only at colliders. Motivated by this...
