Rodrigo Capucha

$t \bar{t}$ production as a window to invisible new physics

Rodrigo Capucha, João Lopes, João Bravo Martins, António Onofre et autres

We present a phenomenological study where we probe the sensitivity to invisible dark matter (DM) mediators produced in association with a $t\bar{t}$ pair at the Large Hadron Collider (LHC). Building on previous work focused on scalar mediators, we extend the analysis to …

RelExt: A new dark matter tool for the exploration of dark matter models

Rodrigo Capucha, Karim Elyaouti, Johann Plotnikov, Rui Santos

RelExt: A New Dark Matter Tool for the Exploration of Dark Matter Models

Rodrigo Capucha, Karim Elyaouti, Margarete Mühlleitner, Johann Plotnikov et autres

We present the C++ program RelExt for Standard Model (SM) extensions that feature a Dark Matter (DM) candidate. The tool allows to efficiently scan the parameter spaces of these models to find parameter combinations that lead to relic density values which are …

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V -associated production and vector boson fusion as an LHC signature of C P violation

Rodrigo Capucha, Álvaro Lozano-Onrubia, Luca Merlo, José Miguel No et autres

We investigate the role of vector boson fusion (VBF) and associated production with an electroweak boson ( V -AP) of beyond-the-Standard-Model Higgs bosons at the LHC in probing C P violation in extended Higgs sectors. Resonant production of a new Higgs boson …

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V-Associated Production & Vector Boson Fusion as an LHC Signature of CP Violation

Rodrigo Capucha, Álvaro Lozano-Onrubia, Luca Merlo, José Miguel No et autres

We investigate the role of vector boson fusion (VBF) and associated production with an electroweak boson (V-AP) of beyond-the-Standard-Model Higgses at the LHC in probing CP violation in extended Higgs sectors. Resonant production of a new Higgs boson through V-AP/VBF subsequently decaying …

Relext: A New Dark Matter Tool for the Exploration of Dark Matter Models

Johann Plotnikov, Rodrigo Capucha, Karim Elyaouti, Rui Santos

Freeze-in as a complementary process to freeze-out

Rodrigo Capucha, Karim Elyaouti, Margarete Mühlleitner, Johann Plotnikov et autres

A bstract There are many extensions of the Standard Model with a dark matter (DM) candidate obtained via the freeze-out mechanism. It can happen that after all experimental and theoretical constraints are taken into account, all parameter points have a relic density …

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Freeze-in as a Complementary Process to Freeze-Out

Rodrigo Capucha, Karim Elyaouti, Margarete Mühlleitner, Johann Plotnikov et autres

There are many extensions of the Standard Model with a dark matter (DM) candidate obtained via the freeze-out mechanism. It can happen that after all experimental and theoretical constraints are taken into account, all parameter points have a relic density below the …

Search for an invisible scalar in $$ t\overline{t} $$ final states at the LHC

Duarte Azevedo, Rodrigo Capucha, Pedro Dalla Vecchia Chaves, João Bravo Martins et autres

Abstract We use the current $$ t\overline{t} $$ t t ¯ experimental analysis to look for Dark Matter (DM) particles hidden in the final state. We present a phenomenological study where we successfully perform the reconstruction of a $$ t\overline{t} $$ t …

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Search for an invisible scalar in $t \bar{t}$ final states at the LHC

Duarte Azevedo, Rodrigo Capucha, Pedro Dalla Vecchia Chaves, João Bravo Martins et autres

We use the current $t\bar t$ experimental analysis to look for Dark Matter (DM) particles hidden in the final state. We present a phenomenological study where we successfully perform the reconstruction of a $t\bar{t}$ system in the presence of a scalar mediator …

Impact of electroweak group representation in models for B and g−2 anomalies from dark loops

Rodrigo Capucha, Da Huang, Tomás Lopes, Rui Santos

We discuss two models that are part of a class providing a common explanation for lepton flavor universality violation in $b\ensuremath{\rightarrow}s{l}^{+}{l}^{\ensuremath{-}}$ decays, the dark matter (DM) problem and the muon ($g\ensuremath{-}2$) anomaly. The $B$ meson decays and the muon ($g\ensuremath{-}2$) anomalies are …

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CP-violation, asymmetries and interferences in $$ t\overline{t}\phi $$

Duarte Azevedo, Rodrigo Capucha, António Onofre, Rui Santos

A bstract In this paper, we use the associated production of top-quark pairs ( $$ t\overline{t} $$ t t ¯ ) with a generic scalar boson ( ϕ ) at the LHC ( pp → $$ t\overline{t}\phi $$ t t ¯ ϕ …

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