75 citations · 246 across the 11 of their papers we have counts for
11 papers
Double inflation via non-minimally coupled spectator
Mio Kubota, Kin-ya Oda, Stanislav Rusak +1
We argue that double inflation may occur when a spectator field is non-minimally coupled to gravity. As a concrete example, we study a two-field inflationary model where the initia…
Towards a discovery of BSM physics from the Cabibbo angle anomaly
Chien-Yeah Seng
New developments in both the theories and experiments related to the extraction of the top-row Cabibbo-Kobayashi-Maskawa matrix elements and led to a series of ne…
Destabilization of the EW vacuum in non-minimally coupled inflation
Stanislav Rusak
Current cosmological data favour inflationary models non-minimally coupled to gravity. In this work we study the implications of the metastability of the electroweak vacuum in this…
Higgs-Inflaton Mixing and Vacuum Stability
Yohei Ema, Mindaugas Karciauskas, Oleg Lebedev +2
The quartic and trilinear Higgs field couplings to an additional real scalar are renormalizable, gauge and Lorentz invariant. Thus, on general grounds, one expects such couplings b…
Postinflationary vacuum instability and Higgs-inflaton couplings
Kari Enqvist, Mindaugas Karciauskas, Oleg Lebedev +2
The Higgs-inflaton coupling plays an important role in the Higgs field dynamics in the early Universe. Even a tiny coupling generated at loop level can have a dramatic effect on th…
Lattice Calculation of the Decay of Primordial Higgs Condensate
Kari Enqvist, Sami Nurmi, Stanislav Rusak +1
We study the resonant decay of the primordial Standard Model Higgs condensate after inflation into gauge bosons on the lattice. We find that the non-Abelian interactions be…
Non-Abelian dynamics in the resonant decay of the Higgs after inflation
Kari Enqvist, Sami Nurmi, Stanislav Rusak
We study the resonant decay of the Higgs condensate into weak gauge bosons after inflation and estimate the corrections arising from the non-Abelian self-interactions of the gauge…
Reheating dynamics affects non-perturbative decay of spectator fields
Kari Enqvist, Rose N. Lerner, Stanislav Rusak
The behaviour of oscillating scalar spectator fields after inflation depends on the thermal background produced by inflaton decay. Resonant decay of the spectator is often blocked…
Constraints on neutrino density and velocity isocurvature modes from WMAP-9 data
Matti Savelainen, Jussi Valiviita, Parampreet Walia +2
We use WMAP 9-year and other CMB data to constrain cosmological models where the primordial perturbations have both an adiabatic and a (possibly correlated) neutrino density (NDI),…
Modulated preheating and isocurvature perturbations
Kari Enqvist, Stanislav Rusak
We consider a model of preheating where the coupling of the inflaton to the preheat field is modulated by an additional scalar field which is light during inflation. We establish t…
Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
Jussi Valiviita, Matti Savelainen, Marianne Talvitie +2
We constrain cosmological models where the primordial perturbations have both an adiabatic and a (possibly correlated) cold dark matter (CDM) or baryon isocurvature component. We u…