VAST 2026: From Vacuum Stability to Gravitational Waves

Session

Electroweak Vacuum Stability

Oct 21, 2026, 5:00 PM

Real Jardín Botánico, CSIC.

9. Linking Neutrino Masses, Dark Matter, and Higgs Criticality via Gauged $U ( 1 )_{B − L}$

Eduardo Peinado (Instituto de Física de la Universidad Nacional Autónoma de México)

10/21/26, 5:00 PM

$U(1)_{B-L}$ gauged extensions of the Standard Model provide a simple and phenomenological rich framework for neutrino mass generation. However, dark matter and the stability of the Higgs potential are often addressed as separate issues. In this talk, we discuss a model in which these three aspects are linked. The model contains two sterile pseudo-Dirac fermion pairs in the visible sector and...

27. Constraining the real singlet extension of the SM

Moritz Bosse (TU Dortmund)

10/21/26, 5:20 PM

It is widely appreciated that the electroweak vacuum of Standard Model
resides in a region of metastability. We discuss how absolute stability is
achieved in extensions by a real scalar singlet. Using the renormalisation
group running of couplings, we identify the parameter region for stability
up to the Planck scale, mediated by the Higgs-portal interaction.
Higgs-singlet mixing connects...

20. Higgs Vacuum Stability, Reheating, and Gravitational Waves

Giorgio Laverda (JGU Mainz)

10/21/26, 5:40 PM

The Higgs non-minimal coupling to background curvature is well known to stabilise Higgs fluctuations during inflation, thus alleviating the vacuum-stability problem. However, during a post-inflationary phase of kination, the same coupling can generate a large tachyonic effective mass, dramatically worsening the stability of the Higgs vacuum. In this talk, I will show how this tachyonic...