401 citations · 1.3k across the 41 of their papers we have counts for
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GOOFy -- a systematic approach
Bohdan Grzadkowski, Odd Magne Ogreid
We investigate in detail a new class (GOOFy) of transformations for bosonic and fermionic fields that leave the Lagrangian density unchanged. The transformations act upon complex s…
CP violation in H^\pm \to W^\pm Z: A physical approach for the 2HDM
Wafaa Khater, Odd Magne Ogreid, Per Osland +1
We investigate CP violation in the process H^\pm \to W^\pm Z within the framework of the two-Higgs-Doublet model (2HDM). Amplitudes are expressed transparently in terms of physical…
Imaginary scaling invariance of the one-loop effective potential
P. M. Ferreira, B. Grzadkowski, O. M. Ogreid
Recently, a hitherto unknown class of renormalization group stable relations between parameters of bosonic field theories have been identified and dubbed as the r0 or 'GOOFy' symme…
CP-violation in the Weinberg 3HDM potential
O. M. Ogreid, P. Osland, M. N. Rebelo
We explore the phenomenology of Weinberg's symmetric three-Higgs-doublet potential, allowing for spontaneous violation of CP due to complex vacuum expectation value…
New Symmetries of the Two-Higgs-Doublet Model
Pedro M. Ferreira, Bohdan Grzadkowski, Odd Magne Ogreid +1
The Two Higgs Doublet Model invariant under the gauge group SU(2)xU(1) is known to have six additional global discrete or continuous symmetries of its scalar sector. We have discov…
Complex -symmetric 3HDM
A. Kunčinas, O. M. Ogreid, P. Osland +1
CP violation plays a very important role in nature with implications both for Particle Physics and for Cosmology. Accounting for the observed matter anti-matter asymmetry of the Un…
Revisiting two dark matter candidates in -symmetric three-Higgs-doublet models
A. Kunčinas, O. M. Ogreid, P. Osland +1
Models with an extended scalar electroweak sector are well motivated. Such models could accommodate a dark matter candidate if there is an additional scalar representation with a v…
Light scalars in the Weinberg 3HDM potential with spontaneous CP violation
R. Plantey, O. M. Ogreid, P. Osland +2
The -symmetric 3HDM potential, sometimes called Weinberg's 3HDM potential, can accommodate both explicit and spontaneous CP violation as well as natu…
Softly broken symmetries in the 2HDM -- an invariant formulation
Pedro M. Ferreira, Bohdan Grzadkowski, Odd Magne Ogreid +1
Soft breaking of a symmetry requires an invariance of the dimension-4 part of the Lagrangian and non-trivial variation of the lower-dimensional part. However, in general, separatio…
Weinberg's 3HDM potential with spontaneous CP violation
R. Plantey, O. M. Ogreid, P. Osland +2
We study the potential of Weinberg's -symmetric three-Higgs-doublet model (3HDM). The potential is designed to accommodate CP violation in the scala…
Two dark matter candidates in three-Higgs-doublet models with symmetry
A. Kunčinas, O. M. Ogreid, P. Osland +1
Models with an extended scalar electroweak sector can have vanishing vacuum expectation values in a basis where an underlying symmetry is imposed. Such extensions are very well mot…
Dark matter in a CP-violating three-Higgs-doublet model with symmetry
A. Kunčinas, O. M. Ogreid, P. Osland +1
In spite of the success of the Standard Model of Particle Physics, there are some theoretical predictions which are not yet fully established experimentally as well as some experim…
Dark matter in three-Higgs-doublet models with symmetry
W. Khater, A. Kunčinas, O. M. Ogreid +2
Models with two or more scalar doublets with discrete or global symmetries can have vacua with vanishing vacuum expectation values in the bases where symmetries are imposed. If a s…
Symmetries of the 2HDM: an invariant formulation and consequences
P. M. Ferreira, B. Grzadkowski, O. M. Ogreid +1
Symmetries of the Two-Higgs-Doublet Model (2HDM) potential that can be extended to the whole Lagrangian, i.e. the CP-symmetries CP1, CP2, CP3 and the Higgs-family symmetries Z2, U(…
-inspired three-Higgs-doublet models: A class with a complex vacuum
A. Kuncinas, O. M. Ogreid, P. Osland +1
In this paper we analyse in detail an -symmetric three-Higgs-doublet model with a specific vacuum configuration. This analysis allows us to illustrate important features of mo…
Implications of symmetries in the scalar sector
Howard E. Haber, O. M. Ogreid, P. Osland +1
Symmetries play a very important rôle in Particle Physics. In extended scalar sectors, the existence of symmetries may permit the models to comply with the experimental constraints…
The CP-symmetries of the 2HDM
Bohdan Grzadkowski, Odd Magne Ogreid, Per Osland
We discuss the three different classes of CP-symmetries that can be realized in a two-Higgs-doublet model, CP1, CP2 and CP3. We express conditions for realizing these symmetries in…
Symmetries and Mass Degeneracies in the Scalar Sector
Howard E. Haber, O. M. Ogreid, P. Osland +1
We explore some aspects of models with two and three SU(2) scalar doublets that lead to mass degeneracies among some of the physical scalars. In Higgs sectors with two scalar doubl…
Heavy Higgs boson decays in the alignment limit of the 2HDM
Bohdan Grzadkowski, Howard E. Haber, Odd Magne Ogreid +1
The Standard Model (SM)-like couplings of the observed Higgs boson impose strong constraints on the structure of any extended Higgs sector. We consider the theoretical properties a…
CP violation in extended Higgs sectors
O. M. Ogreid, P. Osland, M. N. Rebelo
We discuss how one can identify CP violation (and conservation) in multi-Higgs-doublet potentials. After a brief review of CP violation in the 2HDM, we refer to the fact that for N…
Invariants and CP violation in the 2HDM
Odd Magne Ogreid
We discuss the importance of basis invariants in the general 2HDM and how these relates to masses and couplings. We also present a simple, yet powerful technique to translate param…
A Simple Method to detect spontaneous CP Violation in multi-Higgs models
O. M. Ogreid, P. Osland, M. N. Rebelo
For models with several Higgs doublets we present an alternative method to the one proposed by Branco, Gerard and Grimus, in 1984, to check whether or not CP is spontaneously viola…
Spontaneous CP violation in the 2HDM: physical conditions and the alignment limit
B. Grzadkowski, O. M. Ogreid, P. Osland
For the general Two-Higgs-Doublet model, we present conditions for having spontaneous CP violation, in terms of physical masses and couplings. These relations involve the charged-H…
CP Violation in the scalar sector
D. Emmanuel-Costa, O. M. Ogreid, P. Osland +1
Models with an extended scalar sector may in principle provide new sources of CP violation originating in the scalar potential. One of the simplest ways to implement this idea is t…