RT Dissertation/Thesis
T1 Portals to New Physics: tracing the hints of Long-Lived Particles at the LHCb and CODEX-b experiments
A1 Rodríguez Fernández, Emilio Xosé
K1 LHCb
K1 CODEX-b
K1 LLPs
K1 Multimuons
AB This thesis contributes to the search for Long-Lived Particles beyond the Standard Model in the LHCb and CODEX-b experiments. It presents an analysis of the rare Bmeson decays into multi-muon final states predicted by non-minimal Composite Higgs models. Experimental data from LHCb corresponding to Run 2 are used to set limits in both the prompt and displaced regimes for Bs and Bu decay chains, with several reconstruction techniques explored to maximize the sensitivity reach. The work also describes contributions to the early development of the future CODEX-b detector, including the installation of the CODEX-beta demonstrator during Run 3 and the creation of a fast-simulation framework.
YR 2025
FD 2025
LK https://hdl.handle.net/10347/45445
UL https://hdl.handle.net/10347/45445
LA eng
DS Minerva
RD 28 abr 2026