Scalars 2025: Higgs bosons and cosmology

Session

Plenary 14

Sep 25, 2025, 4:30 PM

0.06 (University of Warsaw, Faculty of Physics)

Conveners

Plenary 14

• Manuel Drees

54. On new physics contributions to $H \rightarrow l^+ l^- \gamma$

Michel Tytgat (Université Libre de Bruxelles)

9/25/25, 4:30 PM

Plenary

Motivated by a small (probably fading away) but intriguing excess observed in the decay mode $H \rightarrow l^+l^- \gamma$ reported by both the ATLAS and CMS collaborations, I explore the possibility that new physics contributes directly to the effective $H \rightarrow l^+l^- \gamma$ coupling rather than modifying the $Z$ peak. Concretely, I consider a dimension-8 operator that could arise...

90. Model building from the bottom up

Manuel Pérez-Victoria (University of Granada)

9/25/25, 5:00 PM

Plenary

I will discuss the systematic exploration of perturbative UV completions of effective theories with new heavy particles of spin 1.

57. Linking the KM3-230213A Neutrino Event to Dark Matter Decay and Gravitational Waves Signals

Pyungwon Ko (KIAS)

9/25/25, 5:30 PM

Plenary

The KM3NeT collaboration recently reported the detection of an ultra-high-energy neutrino event, dubbed KM3-230213A. This is the first observed neutrino event with energy of the order of O(100)PeV, the origin of which remains unclear. We interprete this high energy neutrino event as the Dirac fermion dark matter (DM) $\chi$ decay through the right-handed (RH) neutrino portal assuming the...

72. Complementary Probes of a Warped Dimension

Mariano Quiros (IFAE)

Plenary

A warped dimension is characterized by a strong first order phase transition from the Black Hole phase to the Thermal Warped Space phase, holographically dual to a deconfined/confined phase transition (similar to the QCD phase transition, but much stronger). In such phase transition the production and detection of Primordial Black Holes and a Stochastic Gravitational Waves Background in...