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Résumé |
In this seminar, we investigate the potential for probing cosmological phase transitions using the Large
Hadron Collider (LHC) and the Laser Interferometer Space Antenna (LISA) in the upcoming decades. The
LHC is expected to remain in operation until 2025, before undergoing a high-luminosity upgrade and
operating until 2039. Additionally, LISA, set for launch in the mid-2030s, offers sensitivity to primordial
stochastic Gravitational Wave (GW) backgrounds, generated during a First-Order Phase Transition (FOPT) in
the early universe.
Economical additions of the Standard Model (SM), such as Higgs doublet extensions, are capable of
accommodating a first-order electroweak (EW) phase transition, while predicting new particles at the EW
scale that may be detectable at the LHC. We demonstrate that the LHC plays a crucial role in shaping the
prospects for detecting GW signals from such scenarios. Furthermore, even if new physics resides at higher
energy scales inaccessible to the LHC, we can use LISA to probe models incorporating extra B-L gauge
forces, explaining dark matter as primordial black holes and accommodating leptogenesis and neutrino
masses. |
