LIO International Conference 2025 on "New Approaches to Naturalness"

Session

Cosmological Selection of Vacuum

May 20, 2025, 5:25 PM

Dirac/RdC-Amphithéâtre (IP2I)

Conveners

Cosmological Selection of Vacuum

• Aldo Deandrea (IP2I - Université Lyon 1)

Cosmological Selection of Vacuum

• Giacomo Cacciapaglia (LPTHE)

Cosmological Selection of Vacuum

• Giacomo Cacciapaglia (LPTHE)

37. A cosmological solution to the doublet-triplet splitting problem

Pablo Sesma (IPhT Saclay)

5/20/25, 5:25 PM

Cosmological Selection of Vacuum

41. The Relaxion: An update

Geraldine Servant (CERN)

5/20/25, 5:55 PM

Cosmological Selection of Vacuum

In this talk, I re-visit the original relaxion model by Graham-Kaplan-Rajendran in the regime where the relaxion is subject to large fluctuations during its dynamics. I discuss the modified stopping conditions for such dynamics of the relaxion and the new parameter space. Interestingly, in a significant region of the parameter space, the relaxion can naturally account for the observed dark...

38. A Critical Look at the Higgs

Maximilian Detering (King's College London)

5/21/25, 9:00 AM

Cosmological Selection of Vacuum

Self-organised criticality, realised through cosmological dynamics in the early universe, is an alternative paradigm for addressing the electroweak hierarchy problem. In this scenario, an unnaturally light Higgs boson is the result of dynamics driving the electroweak vacuum towards a near-critical metastable point where the Higgs mass is bounded from above by the vacuum instability scale. To...

40. A Multiverse Outside of the Swampland

Gabriele Rigo (IPhT, Saclay)

5/21/25, 9:30 AM

Cosmological Selection of Vacuum

39. The Higgs mass metastability bound

Thomas Steingasser

5/21/25, 10:30 AM

Cosmological Selection of Vacuum