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4 papers
Is our vacuum global in a 331 model with three triplets?
Kristjan Kannike, Niko Koivunen, Aleksei Kubarski
We consider a 331 model, based on , with three triplets with a softly broken symmetry. The resulting scalar potential is commonly used in phe…
How deep is the dip and how tall are the wiggles in inflationary power spectra?
Vadim Briaud, Alexandros Karam, Niko Koivunen +3
We study linear scalar perturbations in single-field models of inflation featuring a non-attractor phase. These models lead to a peak in the curvature power spectrum that may resul…
Dark matter in the scale-invariant 3-3-1-1 model
Alex G. Dias, Kristjan Kannike, Niko Koivunen +3
We propose a scale-invariant model with the 3-3-1-1 gauge symmetry that features universal seesaw for all fermion masses. The discrete remnant of the gauge group, the matter parity…
On the family discrimination in 331-model
Katri Huitu, Niko Koivunen, Timo Kärkkäinen +1
In the so-called 331-models the gauge anomalies cancel only if there are three generations of fermions. This requires one of the quark generations to be in a different representati…