English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

To elucidate the composition of dark matter (DM) is one of the most importantopen questions in particle and astroparticle phenomenology. Within theframework of minimal supersymmetric extensions of the standard model offundamental particles, the `mu-from-nu supersymmetric standard model',$\mu\nu$SSM, solves the $\mu$-problem and reproduces neutrino data, only addingcouplings involving right-handed neutrinos. In this context, the supersymmetricpartner of the graviton, known as gravitino, becomes a natural DM candidate.Working in the mentioned model, in this thesis we have analyzed the detectionof gamma-ray signals arising from decaying gravitino DM considering experimentssuch as $\textit{Fermi}$-LAT. For this purpose all gravitino decays have beentaken into account, complementing previous works. The possibility of anupcoming new generation of gamma-ray detectors has motivated the inclusion ofaxino, the supersymmetric partner of the axion, as a DM candidate. In thisthesis, axino DM has been analyzed in the context of the $\mu\nu$SSM for thefirst time. Finally, scenarios with multicomponent DM have been studied,focusing on gravitinos and axinos coexisting as DM constituents. This novelscenario includes two very different cases with distinctive features: axinolighter than gravitino and vice versa. Considering the sensitivity of futureMeV-GeV gamma-ray telescopes, axino and gravitino prospects of detection wereanalyzed in the mixed scenarios mentioned previously. In some parameter spaceregions, both candidates can produce a signal, therefore a double-line featurearises as a smoking gun that would uncover the DM composition.

Fenomenolog\'ia de modelos supersim\'etricos: part\'iculas y materia oscura