2.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- V. Konotop2 profiles96 · h 53
- Rui Santos55 · h 38
- P. Ferreira3 profiles39 · h 27
- M. M. Telo da Gama2 profiles33 · h 25
- Y. Kartashov28 · h 54
- D. Zezyulin26 · h 23
- N. Araújo2 profiles22 · h 21
- M. Mühlleitner16 · h 52
- J. M. Tavares14 · h 23
- L. Torner13 · h 65
- M. Tasinkevych2 profiles13 · h 28
- J. P. Silva2 profiles12 · h 30
- University of LisbonPT321 papers
- Instituto Politécnico de LisboaPT99 papers
- Institute of Photonic SciencesES24 papers
- Universidade Federal do CearáBR23 papers
- University of MinhoPT22 papers
- Universitat Politècnica de CatalunyaES21 papers
- ETH ZurichCH20 papers
- Institute of SpectroscopyRU19 papers
- Instituto Superior TécnicoPT19 papers
- Centre National de la Recherche ScientifiqueFR17 papers
- Karlsruhe Institute of TechnologyDE17 papers
- University of AveiroPT16 papers
94 papers · 1 filter
Lepton Flavor Specific Extended Higgs Model
B. L. Gonçalves, Matthew Knauss, Marc Sher
In extended Higgs models, a discrete symmetry is needed in the quark sector to avoid tree-level flavor-changing neutral currents. However, this is not necessary the case in the lep…
Collider phenomenology of new neutral scalars in a flavoured multi-Higgs model
Pedro M. Ferreira, João Gonçalves, António P. Morais +3
In this work, we propose and explore for the first time a new collider signature of heavy neutral scalars typically found in many distinct classes of multi-Higgs models. This signa…
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…
Impact of electroweak group representation in models for and anomalies from Dark Loops
Rodrigo Capucha, Da Huang, Tomás Lopes +1
We discuss two models which are part of a class providing a common explanation for lepton flavor universality violation in decays, the dark matter (DM) problem a…
Direct detection of pseudo-Nambu-Goldstone dark matter in a two Higgs doublet plus singlet extension of the SM
Thomas Biekötter, Pedro Gabriel, María Olalla Olea-Romacho +1
We calculate the leading radiative corrections to the dark-matter-nucleon scattering in the pseudo-Nambu-Goldstone dark matter model augmented with a second Higgs doublet (S2HDM).…
P-even, CP-violating Signals in Scalar-Mediated Processes
Howard E. Haber, Venus Keus, Rui Santos
Most studies of Higgs sector CP violation focus on the detection of CP-violating neutral Higgs-fermion Yukawa couplings, which yield P-odd, CP-violating phenomena. There is some li…
Electroweak Corrections to Dark Matter Direct Detection in the Dark Singlet Phase of the N2HDM
Seraina Glaus, Margarete Mühlleitner, Jonas Müller +2
Direct detection experiments are the only way to obtain indisputable evidence of the existence of dark matter (DM) in the form of a particle. These experiments have been used to pr…
One-loop Corrections to the Higgs Boson Invisible Decay in a Complex Singlet Extension of the SM
Felix Egle, Margarete Mühlleitner, Rui Santos +1
The search for dark matter (DM) at colliders is founded on the idea of looking for something invisible. There are searches based on production and decay processes where DM may reve…
Benchmarking Di-Higgs Production in Various Extended Higgs Sector Models
Hamza Abouabid, Abdesslam Arhrib, Duarte Azevedo +4
We present a comprehensive study on Higgs pair production in various archetypical extended Higgs sectors such as the real and the complex 2-Higgs-Doublet Model, the 2-Higgs-Doublet…
The hidden side of scalar-triplet models with spontaneous CP violation
P. M. Ferreira, B. L. Gonçalves, F. R. Joaquim
Scalar triplet extensions of the Standard Model provide an interesting playground for the explanation of neutrino mass suppression through the type-II seesaw mechanism. Propelled b…
Impact of SM parameters and of the vacua of the Higgs potential in gravitational waves detection
Felipe F. Freitas, Gabriel Lourenço, António P. Morais +5
In this work we discuss two different phases of a complex singlet extension of the Standard Model (SM) together with an extension that also includes new fermion fields, in particul…
Ultralight bosons for strong gravity applications from simple Standard Model extensions
Felipe F. Freitas, Carlos A. R. Herdeiro, António P. Morais +5
We construct families, and concrete examples, of simple extensions of the Standard Model that can yield ultralight {real or} complex vectors or scalars with potential astrophysical…
A three Higgs doublet model with symmetry-suppressed flavour changing neutral currents
Dipankar Das, P. M. Ferreira, António P. Morais +3
We construct a three-Higgs doublet model with a flavour non-universal symmetry. That symmetry induces suppressed flavour-changing interactions media…
One-loop Corrections to the Higgs Boson Invisible Decay in the Dark Doublet Phase of the N2HDM
Duarte Azevedo, Pedro Gabriel, Margarete Muhlleitner +2
The Higgs invisible decay width may soon become a powerful tool to probe extensions of the Standard Model with dark matter candidates at the Large Hadron Collider. In this work, we…
in the 2HDM and slightly beyond -- an updated view
P. M. Ferreira, B. L. Gonçalves, F. R. Joaquim +1
The recent measurement of the muon anomaly continues to defy a Standard Model explanation, but can be accommodated within the framework of two Higgs doublet models. If one…
Light Higgs searches in production at the LHC
Duarte Azevedo, Rodrigo Capucha, Emanuel Gouveia +2
In this paper we propose a new reconstruction method to explore the low mass region in the associated production of top-quark pairs () with a generic scalar boson () a…
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(…
CP Violating Coupling in the Standard Model and Beyond
Da Huang, António P. Morais, Rui Santos
Inspired by the recent development in determining the property of the observed Higgs boson, we explore the -violating (CPV) cou…
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…
Electroweak Corrections in a Pseudo-Nambu Goldstone Dark Matter Model Revisited
Seraina Glaus, Margarete Mühlleitner, Jonas Müller +3
Having so far only indirect evidence for the existence of Dark Matter a plethora of experiments aims at direct detection of Dark Matter through the scattering of Dark Matter partic…
Anomalies in Decays and Muon from Dark Loops
Da Huang, António P. Morais, Rui Santos
We explore a class of models which can provide a common origin for the recently observed evidence for lepton flavor universality violation in decays, the dark ma…
Scalar mass dependence of angular variables in production
Duarte Azevedo, Rodrigo Capucha, António Onofre +1
In this paper we explore CP discrimination in the associated production of top-quark pairs () with a generic scalar boson () at the LHC. We probe the CP-sensitivity of…
Suppression of the Higgs Dimuon Decay
P. M. Ferreira, Marc Sher
It is often stated that elimination of tree-level flavor-changing neutral currents in multi-Higgs models requires that all fermions of a given charge to couple to the same Higgs bo…
Stability of neutral minima against charge breaking in the Higgs triplet model
P. M. Ferreira, B. L. Gonçalves
We analyse the possibility of charge breaking minima developing in the Higgs triplet model, and under what conditions they are deeper than charge-preserving ones. Analytical expres…