Conveners
Session 4
- Deog Ki Hong ()
Session 4
- Hyun Min Lee ()
The recently suggested Festina-Lente (FL) bound provides a lower bound on the masses of
U(1) charged particles in terms of the positive vacuum energy. Since the charged particle masses in the Standard Model (SM) are generated by the Higgs mechanism, the FL bound provides a testbed of consistent Higgs potentials in the current dark energy-dominated universe as well as during inflation. We...
If the strange quark were lighter, QCD phase transition could have been first order. This implies that QCD may have quantum critical points as the Higgs vev v_h is varied from its Standard Model value. We show that inflationary quantum evolution of v_h with the relaxion can drive our universe toward those critical points, realizing the weak scale close to the observed value while explaining...
Primordial black holes are gaining a renewed interest as a source of various phenomena in our early universe, and are regarded to be appealing probes for the curvature perturbation at small scales. These enhanced curvature perturbations also lead to second order gravitational waves, with many ranges of frequencies within reach of future observations. Here I analyze the curvature perturbation...
In the inflationary paradigm, reheating processes have potentially rich phenomenology. First, for observational side, this affects to predictions on cosmological observables. We study effects of reheating on inflationary predictions of models with general non-minimal coupling possessing asymptotically flat potential, including Higgs inflation. We consider wide range of non-minimal coupling in...
Higgs inflation has drawn attention due to the minimal possibility of the Standard Model Higgs playing the role of the inflation field. However, the large non minimal coupling with gravity leads to unitarity violation. In this talk, we consider a class of models dubbed sigma-models, UV completions to Higgs inflation arising from general higher curvature terms beyond Einstein gravity. We...
It is known that the Higgs inflation suffers from unitarity problem due to a large non-minimal coupling of Higgs field to Ricci scalar. Recently, it has been clear that introducing a Ricci square term (R2 term) in the Higgs inflation can solve this problem, and provide its UV completion. This model known as Higgs-R2 inflation perfectly agrees with the CMB observation of the Planck result. In...
We study the phenomenological signatures of the light charged Higgs in Type-I 2HDM. The previous studies rely on its production via the decay of top quark into a light charged Higgs boson and a bottom quark. Over random scanning, we obtain the viable parameter space and suggest more efficient production and decay channels.
We propose a model for the vector-like lepton to explain the small muon mass by a see-saw mechanism, based on lepton-specific two Higgs doublet models with a local $U(1)'$ symmetry. There is no bare muon mass for a nonzero $U(1)'$ charge of the leptophilic Higgs doublet, so the physical muon mass is generated due to the mixing between the vector-like lepton and the muon after the leptophilic...
