Past Pheno Research @ UdeA Jos David Ruiz-lvarez Research topic My - - PowerPoint PPT Presentation

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Past Pheno Research @ UdeA Jos David Ruiz-lvarez Research topic My - - PowerPoint PPT Presentation

Dec 08, 2022 167 likes •356 views

Past Pheno Research @ UdeA Jos David Ruiz-lvarez Research topic My main research topic: Study of Dark Matter (DM) observables for some (ad hoc) models BSM. Second research topics: Neutrino masses and mixings Calculation of

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Past Pheno Research @ UdeA

José David Ruiz-Álvarez

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Research topic

  • My main research topic:

– Study of Dark Matter (DM) observables for

some (ad hoc) models BSM.

  • Second research topics:

– Neutrino masses and mixings – Calculation of Higgs Branching ratios

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About models BSM for DM

  • Ad hoc:

– Singlet: SM + Scalar Singlet – IDM

(Inert Doublet Model): SM + Addtional Higgs doublet coupled only to SM Higgs.

– Radiative

Seesaw: IDM + 3*(Right Neutrino)

  • Theory motivated:

– 331

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Singlet Model

  • We studied DM physics with this model
  • DM candidate: New scalar singlet
  • Scalar singlet only couples to the Higgs
  • Two new free parameters: Higgs-Singlet

coupling and Singlet mass

  • In this model the Invisible Branching ratio
  • f Higgs can be enhanced.
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For example

arXiv:0810.4267

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IDM

  • DM Candidate: Neutral component of the

new scalar doublet

  • Free parameters: 3 masses (charged, odd

and even Higgses), self-interaction of new doublet, and Higgs-New doublet coupling.

  • Properties:

– Enhanced Higgs Invisible Branching ratio – Decay of Charged Higgs into SM Higgs

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For Example

arXiv: 1011.1411

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Research

  • We (Carlos Yaguna, Diego Restrepo and

myself) have studied the consecuences of taking into account the

  • ne

loop contributions to direct detection cross section.

  • Interesting:

– When there is no interaction between the

two doublets there is still a little direct detection cross section, due to electroweak one loop contributions

  • Some checks in progress in order to finish

the work.

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For example

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Radiative Seesaw

  • The DM candidate is the lightest right

neutrino

  • Dirac Right neutrino that gives mass to left

neutrino at loop level, “radiatively”.

  • A main issue of this model is that is able to

explain left neutrino masses, mixings and DM relic density and direct detection.

  • Has only been studied for DM physics in

highly degenerate regime for the additional neutral scalars.

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For example

ArXiv: hep-ph/0604114

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Research

  • We (Oscar Zapata, Diego Restrepo and

myself) are finishing a study were a full scan over the neutral scalar degeneracy is done, and cross-checked with neutrino

  • scillations parameters.
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SLIDE 13

331

  • SU(2) → SU(3)------> New electroweak

bosons.

  • New scalar doublet plus right neutrinos

plus exotic quarks

  • Advantages: Lot of problems explained

(neutrino masses, DM, anomalies, …)

  • Disadvantages:

Lot

  • f

new free parameters, quite disfavoured.

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Research

  • With Farinaldo Queiroz we have published
  • n PRD an article analyzing how the

model behaviour for DM physics, taking into account the recent Higgs discovery and his brnaching ratios.

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Computational tools

  • LanHep: Model implementation for several

packages.

  • MicrOMEGAs:

Calculation

  • f

DM

  • bservables and Higgs branchign ratios
  • CalcHep: Calculation of tree level decay

rates and cross sections

  • FeynArts+FormCalc+LoopTools: One loop

calculations

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Addtional activities

  • Several seminars on the usage of the

computaitonal tools listed below.

  • Several seminars on DM physics.
  • Several

activities

  • n

science “Vulgarization”. For example: Quarknet masterclass.

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Thanks!