17 citations · 104 across the 24 of their papers we have counts for
25 papers · 1 filter
Conditions for boundedness from below of a -symmetric three-Higgs-doublet model
Darius Jurčiukonis, Luís Lavoura
We investigate the orbit space of the scalar potential of a -symmetric three-Higgs-doublet model. We find that, if the potential enjoys invariance, then its three-dimen…
Assessing boundedness from below in the -symmetric three-Higgs-doublet model: algorithm and machine learning
Darius Jurčiukonis, Luís Lavoura, André Milagre
The scalar potential of any particle-physics model must be bounded from below (BFB). We consider the extension of the Standard electroweak Model with three doublets of scal…
On the addition of an quadruplet of scalars to the Standard Model
Darius Jurčiukonis, Luís Lavoura
We consider the extension of the Standard electroweak Model through an quadruplet of scalars with hypercharge either or (with an additional reflection symmetry…
Machine Learning for Prediction of Unitarity and Bounded from Below Constraints
Darius Jurčiukonis
The machine learning (ML) techniques to predict unitarity (UNI) and bounded from below (BFB) constraints in multi-scalar models is employed. The effectiveness of this approach is d…
The oblique parameters from arbitrary new fermions
Francisco Albergaria, Darius Jurčiukonis, Luís Lavoura
We compute the six oblique parameters in a New Physics Model with an arbitrary number of new fermions, in arbitrary representations of , and m…
The vertex in a left-right model
Duarte Fontes, Darius Jurčiukonis, Luís Lavoura
We consider the one-loop corrections to the vertex in a -conserving left--right model (LRM), . a model with gauge group .…
The centers of discrete groups as stabilizers of Dark Matter
Darius Jurčiukonis, Luís Lavoura
The most usual option to stabilize Dark Matter (DM) is a symmetry. In general, though, DM may be stabilized by any with . We consider the way is a subgro…
Two-body lepton-flavour-violating decays in a 2HDM with soft family-lepton-number breaking
Darius Jurčiukonis, Luis Lavoura
We evaluate the decays , , and , where and are charged leptons with different flavo…
Fitting the vertex in the two-Higgs-doublet model and in the three-Higgs-doublet model
Darius Jurčiukonis, Luis Lavoura
We investigate the new contributions to the parameters and of the vertex in a multi-Higgs-doublet model (MHDM). We emphasize that those contributions gener…
Radiative seesaw corrections and charged-lepton decays in a model with soft flavour violation
E. H. Aeikens, P. M. Ferreira, W. Grimus +2
We consider the one-loop radiative corrections to the light-neutrino mass matrix and their consequences for the predicted branching ratios of the five lepton-flavour-violating deca…
Seesaw neutrinos with one right-handed singlet field and a second Higgs doublet
D. Jurčiukonis, T. Gajdosik, A. Juodagalvis
We study parameters of an extension of the Standard Model. The neutrino sector is enlarged by one right-handed singlet field, allowing for the seesaw mechanism type-I, and the Higg…
More models for lepton mixing with four constraints
D. Jurciukonis, L. Lavoura
We propose new lepton-mixing textures that may be enforced through well-defined symmetries in renormalizable models. Each of our textures has four sum rules for the neutrino mass o…
The three- and four-Higgs couplings in the general two-Higgs-doublet model
D. Jurciukonis, L. Lavoura
We apply the unitarity bounds and the bounded-from-below (BFB) bounds to the most general scalar potential of the two-Higgs-doublet model (2HDM). We do this in the Higgs basis, i.e…
Lepton mixing and the charged-lepton mass ratios
D. Jurciukonis, L. Lavoura
We construct a class of renormalizable models for lepton mixing that generate predictions given in terms of the charged-lepton mass ratios. We show that one of those models leads,…
Group-theoretical search for rows or columns of the lepton mixing matrix
D. Jurciukonis, L. Lavoura
We have used the SmallGroups library of groups, together with the computer algebra systems GAP and Mathematica, to search for groups with a three-dimensional irreducible representa…
Scotogenic model for co-bimaximal mixing
P. M. Ferreira, W. Grimus, D. Jurciukonis +1
We present a scotogenic model, i.e. a one-loop neutrino mass model with dark right-handed neutrino gauge singlets and one inert dark scalar gauge doublet , which has symmetries…
A minimal seesaw model with mu-tau symmetry
Darius Jurciukonis, Thomas Gajdosik, Andrius Juodagalvis
We analyse a flavour model for a lepton sector which is based on type I seesaw mechanism, a Z_2 symmetry for lepton flavours, a mu-tau interchange symmetry and a CP symmetry. This…
Flavour symmetries in a renormalizable SO(10) model
P. M. Ferreira, W. Grimus, D. Jurčiukonis +1
In the context of a renormalizable supersymmetric SO(10) Grand Unified Theory, we consider the fermion mass matrices generated by the Yukawa couplings to a $\mathbf{10} \oplus \mat…
Seesaw neutrino masses with a second Higgs doublet added
Darius Jurciukonis, Thomas Gajdosik, Andrius Juodagalvis
We study parameters of an extended standard model. The neutrino sector is enlarged by one or two right-handed singlet fields and the Higgs sector contains one additional doublet. O…
Light neutrino mass spectrum with one or two right-handed singlet fermions added
Darius Jurciukonis, Thomas Gajdosik, Andrius Juodagalvis
We analyse two cases of the minimal extension of the Standard Model when one or two right-handed fields are added to the three left-handed fields. A second Higgs doublet (two Higgs…
Progress in the parametrisation of the Neutrino sector
Thomas Gajdosik, Andrius Juodagalvis, Darius Jurčiukonis +1
Adding gauge singlets to the original Standard Model allows an explanation for the observed smallness of the neutrino masses using the seesaw mechanism. Following our plans present…
Neutrino mass spectrum from the seesaw extension
Darius Jurciukonis, Thomas Gajdosik, Andrius Juodagalvis +1
The smallness of the neutrino masses can be well understood within the seesaw mechanism. We analyse two cases of the minimal extension of the standard model when one or two right-h…
Parametrizing the Neutrino sector of the seesaw extension in tau decays
D. Jurciukonis, T. Gajdosik, A. Juodagalvis +1
The Standard Model includes neutrinos as massless particles, but neutrino oscillations showed that neutrinos are not massless. A simple extension of adding gauge singlet fermions t…
The Spectrum of the Baryon Masses in a Self-consistent SU(3) Quantum Skyrme Model
Darius Jurciukonis, Egidijus Norvaisas, Vidas Regelskis
The semiclassical SU(3) Skyrme model is traditionally considered as describing a rigid quantum rotator with the profile function being fixed by the classical solution of the corres…